| Upper limb |
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| Front of right upper extremity. |
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| Back of right upper extremity. |
| Latin |
membrum superius |
| Gray's |
subject #289 1325 |
| System |
Musculoskeletal |
| MeSH |
Extremity Upper Extremity |
The upper limb or upper extremity is the region in an animal extending from the deltoid region to the hand, including the arm, axilla and shoulder.[1]
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Contents
- 1 Definition
- 2 Human anatomy
- 2.1 Musculoskeletal system
- 2.1.1 Shoulder girdle
- 2.1.2 Shoulder joint
- 2.1.3 Arm
- 2.1.4 Forearm
- 2.1.5 Wrist
- 2.1.6 Hand
- 2.2 Neurovascular system
- 3 Evolutionary variation
- 4 See also
- 5 Notes
- 6 References
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Definition
In formal usage, the term "arm" only refers to the structures from the shoulder to the elbow, explicitly excluding the forearm, and thus "upper limb" and "arm" are not synonymous.[2] However, in casual usage, the terms are often used interchangeably. The term "upper arm" is redundant in anatomy, but in informal usage is used to distinguish between the two terms.
Human anatomy
The muscles of the upper limb can be classified by origin, topography, function, or innervation. While a grouping by innervation reveals embryological and phylogenetic origins, the functional-topographical classification below reflects the similarity in action between muscles (with the exception of the shoulder girdle, where muscles with similar action can vary considerably in their location and orientation.[3]
Musculoskeletal system
Shoulder girdle
Bones of the shoulder girdle
Main article: Shoulder girdle
The shoulder girdle[4] or pectoral girdle[5], composed of the clavicle and the scapula, connects the upper limb to the axial skeleton through the sternoclavicular joint (the only joint in the upper limb that directly articulates with the trunk), a ball and socket joint supported by the subclavius muscle which acts as a dynamic ligament. While this muscle prevents dislocation in the joint, strong forces tend to break the clavicle instead. The acromioclavicular joint, the joint between the acromion process on the scapula and the clavicle, is similarly strengthened by strong ligaments, especially the coracoclavicular ligament which prevents excessive lateral and medial movements. Between them these two joints allow a wide range of movements for the shoulder girdle, much because of the lack of a bone-to-bone contact between the scapula and the thoracic cage. The pelvic girdle is, in contrast, firmly fixed to the axial skeleton, which increases stability and load-bearing capabilities. [5]
The mobility of the shoulder girdle is supported by a large number of muscles. The most important of these are muscular sheets rather than fusiform or strap-shaped muscles and they thus never act in isolation but with some fibres acting in coordination with fibres in other muscles.[5]
- Muscles
- of shoulder girdle excluding the glenohumeral joint[3]
- Migrated from head
- Trapezius, sternocleidomastoideus, omohyoideus
- Posterior
- Rhomboideus major, rhomboideus minor, levator scapulae
- Anterior
- Subclavius, pectoralis minor, serratus anterior
Shoulder joint
Shoulder joint with ligaments
The glenohumeral joint (colloquially called the shoulder joint) is the highly mobile ball and socket joint between the glenoid cavity of the scapula and the head of the humerus. Lacking the passive stabilisation offered by ligaments in other joints, the glenohumeral joint is actively stabilised by the rotator cuff, a group of short muscles stretching from the scapula to the humerus. Little inferior support is available to the joint and dislocation of the shoulder almost exclusively occurs in this direction. [6]
The large muscles acting at this joint perform multiple actions and seemingly simple movements are often the result of composite antagonist and protagonist actions from several muscles. For example, pectoralis major is the most important arm flexor and latissimus dorsi the most important extensor at the glenohumeral joint, but, acting together, these two muscles cancel each other's action leaving only their combined medial rotation component. On the other hand, to achieve pure flexion at the joint the deltoid and supraspinatus must cancel the adduction component and the teres minor and infraspinatus the medial rotation component of pectoralis major. Similarly, abduction (moving the arm away from the body) is performed by different muscles at different stages. The first 10° is performed entirely by the supraspinatus, but beyond that fibres of the much stronger pectoralis major are in position to take over the work. Furthermore, to achieve the full 180° range of abduction the arm must be rotated medially and the scapula most be rotate about itself to direct the glenoid cavity upward. [6]
- Muscles
- of shoulder joint proper[3]
- Posterior
- Supraspinatus, infraspinatus, teres minor, subscapularis, deltoideus, latissimus dorsi, teres major
- Anterior
- Pectoralis major, coracobrachialis
Arm
Superficial muscles of the arm
Main article: Arm
The arm proper (brachium), sometimes called the upper arm,[4] the region between the shoulder and the elbow, is composed of the humerus with the elbow joint at its distal end.
The elbow joint is a complex of three joints — the humeroradial, humeroulnar, and superior radioulnar joints — the former two allowing flexion and extension whilst the latter, together with its inferior namesake, allows supination and pronation at the wrist. Triceps is the major extensor and brachialis and biceps the major flexors. Biceps is, however, the major supinator and while performing this action it ceases to be an effective flexor at the elbow. [7]
- Muscles
- of the arm[3]
- Posterior
- Triceps brachii, anconeus
- Anterior
- Brachialis, biceps brachii
Forearm
Ventral superficial muscles of the forearm
Main article: Forearm
The forearm (antebrachium),[4] composed of the radius and ulna; the latter is the main distal part of the elbow joint, while the former composes the main proximal part of the wrist joint.
Most of the large number of muscles in the forearm are divided into the wrist, hand, and finger extensors on the dorsal side (back of hand) and the ditto flexors in the superficial layers on the ventral side (side of palm). These muscles are attached to either the lateral or medial epicondyle of the humerus. They thus act on the elbow, but, because their origins are located close to the centre of rotation of the elbow, they mainly act distally at the wrist and hand. Exceptions to this simple division are brachioradialis — a strong elbow flexor — and palmaris longus — a weak wrist flexor which mainly acts to tense the palmar aponeurosis. The deeper flexor muscles are extrinsic hand muscles; strong flexors at the finger joints used to produce the important power grip of the hand, whilst forced extension is less useful and the corresponding extensor thus are much weaker. [8]
Biceps is the major supinator (drive a screw in with the right arm) and pronator teres and pronator quadratus the major pronators (unscrewing) — the latter two role the radius around the ulna (hence the name of the first bone) and the former reverses this action assisted by supinator. Because biceps is much stronger than its opponents, supination is a stronger action than pronation (hence the direction of screws). [8]
- Muscles
- of the forearm[3]
- Posterior
- (Superficial) extensor digitorum, extensor digiti minimi, extensor carpi ulnaris, (deep) supinator, abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus, extensor indicis
- Anterior
- (Superficial) pronator teres, flexor digitorum superficialis, flexor carpi radialis, flexor carpi ulnaris, palmaris longus, (deep) flexor digitorum profundus, flexor pollicis longus, pronator quadratus
- Radial
- Brachioradialis, extensor carpi radialis longus, extensor carpi radialis brevis
Wrist
Main article: Wrist
The wrist (carpus),[4] composed of the carpal bones, articulates at the wrist joint (or radiocarpal joint) proximally and the carpometacarpal joint distally. The wrist can be divided into two components separated by the midcarpal joints. The small movements of the eight carpal bones during composite movements at the wrist are complex to describe, but flexion mainly occurs in the midcarpal joint whilst extension mainly occurs in the radiocarpal joint; the latter joint also providing most of adduction and abduction at the wrist. [9]
How muscles act on the wrist is complex to describe. The five muscles acting on the wrist directly — flexor carpi radialis, flexor carpi ulnaris, extensor carpi radialis, extensor carpi ulnaris, and palmaris longus — are accompanied by the tendons of the extrinsic hand muscles (i.e. the muscles acting on the fingers). Thus, every movement at the wrist is the work of a group of muscles; because the four primary wrist muscles (FCR, FCU, ECR, and ECU) are attached to the four corners of the wrist, they also produce a secondary movement (i.e. ulnar or radial deviation). To produce pure flexion or extension at the wrist, these muscle therefore must act in pairs to cancel out each others secondary action. On the other hand, finger movements without the corresponding wrist movements require the wrist muscles to cancel out the contribution from the extrinsic hand muscles at the wrist. [9]
Hand
Main article: Hand
The hand (manus),[4] the metacarpals (in the hand proper) and the phalanges of the fingers, form the metacarpophalangeal joints (MCP, including the knuckles) and interphalangeal joints (IP).
Of the joints between the carpus and metacarpus, the carpometacarpal joints, only the saddle-shaped joint of the thumb offers a high degree of mobility while the opposite is true for the metacarpophalangeal joints. The joints of the fingers are simple hinge joints. [9]
The primary role of the hand itself is grasping and manipulation; tasks for which the hand has been adapted to two main grips — power grip and precision grip. In a power grip an object is held against the palm and in a precision grip an object is held with the fingers, both grips are performed by intrinsic and extrinsic hand muscles together. Most importantly, the relatively strong thenar muscles of the thumb and the thumb's flexible first joint allow the special opposition movement that brings the distal thumb pad in direct contact with the distal pads of the other four digits. Opposition is a complex combination of thumb flexion and abduction that also requires the thumb to be rotated 90° about its own axis. Without this complex movement, humans would not be able to perform a precision grip. [10]
In addition, the central group of intrinsic hand muscles give important contributions to human dexterity. The palmar and dorsal interossei adduct and abduct at the MCP joints and are important in pinching. The lumbricals, attached to the tendons of the flexor digitorum profundus (FDP) and extensor digitorum communis (FDC), flex the MCP joints while extending the IP joints and allow a smooth transfer of forces between these two muscles while extending and flexing the fingers. [10]
- Muscles
- of the hand[3]
- Metacarpal
- Lumbricals, dorsal interossei, palmar introssei
- Thenar
- Abductor pollicis brevis, adductor pollicis, flexor pollicis brevis, opponens pollicis
- Hypothenar
- Abductor digiti minimi, flexor digiti minimi, opponens digiti minimi, palmaris brevis
Neurovascular system
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This section requires expansion. (July 2011) |
Innervation
Branches of brachial plexus
The motor and sensory supply of the upper limb is provided by the brachial plexus which is formed by the ventral rami of spinal nerves C5-T1. In the posterior triangle of the neck these rami form three trunks from which fibers enter the axilla region (armpit) to innervate the muscles of the anterior and posterior compartments of the limb. In the axilla, cords are formed to split into branches, including the five terminal branches listed below. [11] The muscles of the upper limb are innervated segmentally proximal to distal so that the proximal muscles are innervated by higher segments (C5–C6) and the distal muscles are innervated by lower segments (C8–T1). [12]
Motor innervation of upper limb by the five terminal nerves of the brachial plexus:[12]
- The musculocutaneous nerve innervates all the muscles of the anterior compartment of the arm.
- The median nerve innervates all the muscles of the anterior compartment of the forearm except flexor carpi ulnaris and the ulnar part of the flexor digitorum profundus. It also innervates the three thenar muscles and the first and second lumbricals.
- The ulnar nerve innervates the muscles of the forearm and hand not innervated by the median nerve.
- The axillary nerve innervates the deltoid and teres minor.
- The radial nerve innervates the posterior muscles of the arm and forearm
Collateral branches of the brachial plexus:[12]
- The dorsal scapular nerve innervates rhomboid major and minor.
- The long thoracic nerve innervates serratus anterior.
- The suprascapular nerve innervates supraspinatus and infraspinatus
- The lateral pectoral nerve innervates pectoralis major
- The medial pectoral nerve innervates pectoralis major and minor
- The upper subscapular nerve innervates subscapularis
- The thoracodorsal nerve innervates latissimus dorsi
- The lower subscapular nerve innervates subscapularis and teres major
- The medial brachial cutaneous nerve innervates the skin of medial arm
- The medial antebrachial cutaneous nerve innervates the skin of medial forearm
Evolutionary variation
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This section relies largely or entirely upon a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources. (July 2011) |
Upper/front limbs of (top) salamander, sea turtle, crocodile, bird, (bottom) bat, whale, mole, and human
The skeletons of all mammals are based on a common pentadactyl ("five-fingered") template but optimised for different functions. While many mammals can perform other tasks using their forelimbs, their primary use in most terrestrial mammals is one of three main modes of locomotion: unguligrade (hoof walkers), digitigrade (toe walkers), and plantigrade (sole walkers). Generally, the forelimbs are optimised for speed and stamina, but in some mammals some of the locomotion optimisation have been sacrificed for other functions, such as digging and grasping. [13]
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Chimpanzees maintain some of the dexterity brachiating gibbons lack
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In primates, the upper limbs provide a wide range of movement which increases manual dexterity. The limbs of chimpanzees, compared to those of humans, reveal their different lifestyle. The chimpanzee primary uses two modes of locomotion: knuckle-walking, a style of quadrupedalism in which the body weight is supported on the knuckles (or more properly on the middle phalanges of the fingers), and brachiation (swinging from branch to branch), a style of bipedalism in which flexed fingers are used to grasp branches above the head. To meet the requirements of these styles of locomotion, the chimpanzee's finger phalanges are longer and have more robust insertion areas for the flexor tendons while the metacarpals have transverse ridges to limit dorsiflexion (stretching the fingers towards the back of the hand). The thumb is small enough to facilitate brachiation while maintaining some of the dexterity offered by an opposable thumb. In contrast, virtually all locomotion functionality has been lost in humans while predominant brachiators, such as the gibbons, have very reduced thumbs and inflexible wrists. [13]
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A Bush Pig, an ungulate with remaining non-weight-bearing digits, and the skeleton of the extinct Malagasy Hippopotamus
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In ungulates the forelimbs are optimised to maximize speed and stamina to the extent that the limbs serve almost no other purpose. In contrast to the skeleton of human limbs, the proximal bones of ungulates are short and the distal bones long to provide length of stride; proximally, large and short muscles provide rapidity of step. The odd-toed ungulates, such as the horse, use a single third toe for weight-bearing and have significantly reduced metacarpals. Even-toed ungulates, such as the giraffe, uses both their third and fourth toes but a single completely fused phalanx bone for weight-bearing. Ungulates whose habitat does not require fast running on hard terrain, for example the hippopotamus, have maintained four digits. [13]
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A grooming Lynx and a two-toed sloth "at home"
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In species in the order carnivora, some of which are insectivores rather than carnivores, the cats are some of the most highly evolved predators designed for speed, power, and acceleration rather than stamina. Compared to ungulates, their limbs are shorter, more muscular in the distal segments, and maintain five metacarpals and digit bones; providing a greater range of movements, a more varied function and agility (e.g. climbing, swatting, and grooming). Some insectivorous species in this order have paws specialised for specific functions. The sloth bear uses their digits and large claws to tear logs open rather than kill prey. Other insectivorous species, such as the giant and red pandas, have developed large sesamoid bones in their paws that serve as an extra "thumb" while others, such as the meerkat, uses their limbs primary for digging and have vestigial first digits. [13]
The arboreal two-toed sloth, a South American mammal in the order pilosa, have limbs so highly adapted to hanging in branches that it is unable to walk on the ground where it has to drag its own body using the large curved claws on its foredigits. [13]
See also
- Human skeletal changes due to bipedalism
Notes
- ^ "Upper Extremity". MeSH. http://www.nlm.nih.gov/cgi/mesh/2011/MB_cgi?mode=&term=Upper+Extremity&field=entry#TreeA01.378.800. Retrieved June 2011.
- ^ "Arm". MeSH. http://www.nlm.nih.gov/cgi/mesh/2011/MB_cgi?mode=&term=ARM. Retrieved June 2011.
- ^ a b c d e f Ross & Lamperti 2006, p. 256
- ^ a b c d e Ross & Lamperti 2006, p. 208
- ^ a b c Sellers 2002, pp. 1–3
- ^ a b Sellers 2002, pp. 3–5
- ^ Sellers 2002, p. 5
- ^ a b Sellers 2002, pp. 6–7
- ^ a b c Sellers 2002, pp. 8–9
- ^ a b Sellers 2002, pp. 10–11
- ^ Seiden 2002, p. 243
- ^ a b c Seiden 2002, pp. 233–36
- ^ a b c d e Gough-Palmer, Maclachlan & Routh 2008, pp. 502–510
References
- Gough-Palmer, Antony L; Maclachlan, Jody; Routh, Andrew (March 2008). "Paws for Thought: Comparative Radiologic Anatomy of the Mammalian Forelimb". RadioGraphics (28): 501–510. doi:10.1148/rg.282075061. PMID 18349453. http://radiographics.rsna.org/content/28/2/501.full.pdf.
- Ross, Lawrence M; Lamperti, Edward D, eds. (2006). Thieme Atlas of Anatomy: General Anatomy and Musculoskeletal System. Thieme. ISBN 1-58890-419-9.
- Sellers, Bill (2002). "Functional Anatomy of the Upper Limb". http://mac-huwis.lut.ac.uk/~wis/lectures/. Retrieved June 2011.
- Seiden, David (2002). USMLE Step 1 Anatomy Notes. Kaplan Medical.
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Human regional anatomy (TA A01.1)
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| Head |
- Forehead (Sinciput)
- Ear
- Jaw
- Face (Cheek
- Eye
- Nose
- Mouth
- Chin)
- Occiput
- Scalp
- Temple
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| Neck |
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| Trunk |
- Chest (Breast)
- Abdomen (Navel)
- Back
- Pelvis (Sex organs)
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| Limbs |
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Upper limb
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- Shoulder
- Axilla
- Arm
- Elbow
- Forearm
- Wrist
- Hand
- Finger
- Thumb
- Index
- Middle
- Ring
- Little
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Lower limb/
(see also leg)
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- Hip
- Buttocks
- Thigh
- Knee
- Calf
- Crus
- Ankle
- Heel
- Foot
- Toe
- Hallux
- Long
- Third
- Fourth
- Fifth
- Sole
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General anatomy: systems and organs, regional anatomy, planes and lines, superficial axial anatomy, superficial anatomy of limbs
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Bones of upper limbs (TA A02.4, GA 2.200–230)
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| Pectoral girdle, clavicle |
- conoid tubercle
- trapezoid line
- costal tuberosity
- subclavian groove
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| Scapula |
- fossae (subscapular, supraspinatous, infraspinatous)
- scapular notch
- glenoid cavity
- tubercles (infraglenoid, supraglenoid)
- spine of scapula
- acromion
- coracoid process
- borders (superior, lateral/axillary, medial/vertebral)
- angles (superior, inferior, lateral)
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| Humerus |
- upper extremity: necks (anatomical, surgical)
- tubercles (greater, lesser)
- intertubercular sulcus
- body: radial sulcus
- deltoid tuberosity
- lower extremity: capitulum
- trochlea
- epicondyles (lateral, medial)
- supracondylar ridges (lateral, medial)
- fossae (radial, coronoid, olecranon)
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| Forearm |
- radius: upper extremity (head, tuberosity)
- body
- lower extremity (ulnar notch, styloid process)
- ulna: upper extremity (tuberosity, olecranon, coronoid process, radial notch, trochlear notch)
- body
- lower extremity (head, styloid process)
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| Hand |
- carpus: scaphoid
- lunate
- triquetral
- pisiform
- trapezium
- trapezoid
- capitate
- hamate (hamulus)
- metacarpus: 1st metacarpal
- 2nd
- 3rd
- 4th
- 5th
- phalanges of the hand: proximal
- intermediate
- distal
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anat(c/f/k/f, u, t/p, l)/phys/devp/cell
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noco/cong/tumr, sysi/epon, injr
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Joints and ligaments of upper limbs (TA A03.5, GA 3.313)
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| Shoulder |
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Sternoclavicular
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- Anterior sternoclavicular
- Posterior sternoclavicular
- Interclavicular
- Costoclavicular
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Acromioclavicular
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- Syndesmoses: Coracoacromial
- Superior transverse scapular
- Inferior transverse of scapula
Synovial: Acromioclavicular
- Coracoclavicular (trapezoid
- conoid)
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Glenohumeral
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- Capsule
- Coracohumeral
- Glenohumeral (superior, middle, and inferior)
- Transverse humeral
- Glenoid labrum
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| Elbow |
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Humeroradial
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Humeroulnar
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Proximal radioulnar
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- Anular
- Oblique cord
- Quadrate
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| Forearm |
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Distal radioulnar
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- Palmar radioulnar
- Dorsal radioulnar
- Interosseous membrane of forearm
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| Hand |
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Wrist/radiocarpal
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- Dorsal radiocarpal/Palmar radiocarpal
- Dorsal ulnocarpal/Palmar ulnocarpal
- Ulnar collateral/Radial collateral
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- Radiate carpal
- Dorsal intercarpal
- Palmar intercarpal
- Interosseous intercarpal
- Scapholunate
- Pisiform joint (Pisohamate
- Pisometacarpal)
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Carpometacarpal
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- Dorsal carpometacarpal
- Palmar carpometacarpal
- thumb: Radial collateral
- Ulnar collateral
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Intermetacarpal
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- Deep transverse metacarpal
- Superficial transverse metacarpal
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Metacarpophalangeal
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Interphalangeal
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Other
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- Carpal tunnel
- Ulnar canal
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noco(arth/defr/back/soft)/cong, sysi/epon, injr
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List of muscles of upper limbs (TA A04.6, GA 4.432)
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| Shoulder |
deltoid · rotator cuff (supraspinatus, infraspinatus, teres minor, subscapularis) · teres major
fascia: deltoid fascia · supraspinous fascia · infraspinous fascia
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Arm
(compartments) |
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anterior
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coracobrachialis · biceps brachii · brachialis
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posterior
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triceps brachii · anconeus · articularis cubiti
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fascia
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axillary sheath · axillary fascia · brachial fascia · intermuscular septa (lateral, medial)
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other
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spaces (quadrangular space, triangular space, triangular interval)
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| Forearm |
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anterior
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superficial: pronator teres · palmaris longus · flexor carpi radialis · flexor carpi ulnaris · flexor digitorum superficialis
deep: pronator quadratus · flexor digitorum profundus · flexor pollicis longus
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posterior
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superficial: mobile wad (brachioradialis, extensor carpi radialis longus and brevis) · extensor digitorum · extensor digiti minimi · extensor carpi ulnaris
deep: supinator · anatomical snuff box (abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus) · extensor indicis
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fascia
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bicipital aponeurosis · common tendons (extensor, flexor) · antebrachial fascia
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other
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cubital tunnel
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| Hand |
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lateral volar
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thenar (opponens pollicis, flexor pollicis brevis, abductor pollicis brevis) · adductor pollicis
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medial volar
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hypothenar (opponens digiti minimi, flexor digiti minimi brevis, abductor digiti minimi) · palmaris brevis
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intermediate
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lumbrical · interossei (dorsal, palmar)
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fascia
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posterior: extensor retinaculum · extensor expansion
anterior: flexor retinaculum · palmar aponeurosis
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anat (h/n, u, t/d, a/p, l)/phys/devp/hist
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noco(m, s, c)/cong(d)/tumr, sysi/epon, injr
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List of arteries of upper limbs (TA A12.2.09, GA 6.575)
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| Axillary |
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Shoulder
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- scapular anastomosis
- 1st part superior thoracic
- 2nd part thoracoacromial
- deltoid branch
- lateral thoracic
- 3rd part subscapular
- circumflex scapular
- thoracodorsal
- anterior humeral circumflex
- posterior humeral circumflex
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Brachial
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Before split
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- profunda brachii
- radial collateral
- medial collateral
- ulnar collateral
- superior
- inferior
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Radial
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- forearm: radial recurrent
- wrist/carpus: dorsal carpal branch
- palmar carpal branch
- hand: superficial palmar branch
- princeps pollicis
- Radialis indices artery
- radial of index finger
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Ulnar
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- forearm: ulnar recurrent
- anterior
- posterior
- common interosseous
- anterior
- posterior
- recurrent
- wrist/carpus: dorsal carpal branch
- palmar carpal branch
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Arches
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- dorsal carpal arch: dorsal metacarpal
- dorsal digital
- superficial palmar arch: common palmar digital
- proper palmar digital
- deep palmar arch: palmar metacarpal
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anat(a:h/u/t/a/l,v:h/u/t/a/l)/phys/devp/cell/prot
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noco/syva/cong/lyvd/tumr, sysi/epon, injr
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proc, drug(C2s+n/3/4/5/7/8/9)
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Veins of upper limbs (TA A12.3.08, GA 7.660)
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| General |
Subscapular · Axillary · Circumflex scapular
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| Superficial |
arm: Cephalic (Accessory cephalic) · Median cubital · Basilic · Median antebrachial
hand/forearm: Dorsal network (Intercapitular, Dorsal metacarpal) · Superficial palmar arch (Palmar digital)
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| Deep |
arm: Radial · Ulnar · Brachial
hand/forearm: Deep palmar arch (Palmar metacarpal)
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|
|
anat(a:h/u/t/a/l,v:h/u/t/a/l)/phys/devp/cell/prot
|
noco/syva/cong/lyvd/tumr, sysi/epon, injr
|
proc, drug(C2s+n/3/4/5/7/8/9)
|
|
|
|
|
Lymphatics of upper limbs (TA A13.3.01, GA 8.699)
|
|
| Axillary |
- brachial
- pectoral axillary
- subscapular axillary
- central
- apical
subclavian trunk
|
|
| Other |
- supratrochlear
- deltopectoral
|
|
|
|
anat(h, u, t, a, l)/phys/devp
|
|
|
|
|
|
|
Nerves of upper limbs (primarily): the brachial plexus (C5–T1) (TA A14.2.03, GA 9.930)
|
|
| Supraclavicular |
- root (dorsal scapular, long thoracic)
- upper trunk (suprascapular, to the subclavius)
|
|
| Infraclavicular |
|
lateral cord
|
- musculocutaneous (lateral cutaneous of forearm)
- median/lateral root: anterior interosseous
- palmar
- recurrent
- common palmar digital (proper palmar digital)
|
|
|
medial cord
|
- cutaneous: medial cutaneous of forearm
- medial cutaneous of arm
- ulnar: muscular
- palmar
- dorsal (dorsal digital nerves)
- superficial (common palmar digital, proper palmar digital)
- deep
- median/medial root: see above
|
|
|
posterior cord
|
- subscapular (upper, lower)
- thoracodorsal
- axillary (superior lateral cutaneous of arm)
- radial: muscular
- cutaneous (posterior of arm, inferior lateral of arm, posterior of forearm)
- superficial (dorsal digital nerves)
- deep (posterior interosseous)
|
|
|
| Other |
- cutaneous innervation of the upper limbs
|
|
|
|
anat(h/r/t/c/b/l/s/a)/phys(r)/devp/prot/nttr/nttm/ntrp
|
noco/auto/cong/tumr, sysi/epon, injr
|
|
|
|
|
