中手指節関節
WordNet
- the act of joining things in such a way that motion is possible
- the shape or manner in which things come together and a connection is made (同)join, joint, juncture, junction
- expressing in coherent verbal form; "the articulation of my feelings"; "I gave voice to my feelings" (同)voice
- the aspect of pronunciation that involves bringing articulatory organs together so as to shape the sounds of speech
PrepTutorEJDIC
- 〈U〉調音(分節して発音された音) / 〈U〉有節発音;発音の明りょう度 / 〈C〉関節,(植物の)節
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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/02/12 12:16:39」(JST)
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| Metacarpophalangeal joint |
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Metacarpophalangeal articulation and articulations of digit. Volar aspect.
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Metacarpophalangeal articulation and articulations of digit. Ulnar aspect.
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| Details |
| Latin |
articulationes metacarpophalangeae |
| Identifiers |
| Gray's |
p.332 |
| MeSH |
A02.835.583.345.512 |
Dorlands
/Elsevier |
a_64/12161410 |
| TA |
A03.5.11.501 |
| FMA |
71364 |
| Anatomical terminology |
The metacarpophalangeal joints (MCP) refer to the joints between the metacarpal bones and the phalanges of the fingers. That means the MCP joint is the knuckle between the hand and the finger. These are of the condyloid kind, formed by the reception of the rounded heads of the metacarpal bones into shallow cavities on the proximal ends of the first phalanges, with the exception of that of the thumb, which is a ginglymus.
Contents
- 1 Structure
- 1.1 Ligaments
- 1.2 Dorsal surfaces
- 1.3 In other animals
- 2 Function
- 3 Clinical significance
- 4 References
- 5 External links
Structure
Ligaments
See also: Palmar plate
Each joint has:
- palmar ligaments of metacarpophalangeal articulations
- collateral ligaments of metacarpophalangeal articulations
Dorsal surfaces
The dorsal surfaces of these joints are covered by the expansions of the Extensor tendons, together with some loose areolar tissue which connects the deep surfaces of the tendons to the bones.
In other animals
In many quadrupeds, particularly horses and other larger animals, the metacarpophalangeal joint is referred to as the "fetlock." This term is translated literally as "foot-lock." In fact, although the term fetlock does not specifically apply to other species' metacarpophalangeal joints (for instance, humans), the "second" or "mid-finger" knuckle of the human hand does anatomically correspond to the fetlock on larger quadrupeds. For lack of a better term, the shortened name may seem more practical.
Function
The movements which occur in these joints are flexion, extension, adduction, abduction, and circumduction; the movements of abduction and adduction are very limited, and cannot be performed while the fingers form a fist.[1]
The muscles of flexion and extension are as follows:
| Location |
Flexion |
Extension |
| fingers |
Flexor digitorum superficialis and profundus, lumbricales, and interossei, assisted in the case of the little finger by the flexor digiti minimi brevis |
extensor digitorum communis, extensor indicis proprius, and extensor digiti minimi muscle |
| thumb |
flexor pollicis longus and brevis |
extensor pollicis longus and brevis |
Clinical significance
Arthritis of the MCP is a distinguishing feature of Rheumatoid Arthritis, as opposed to the distal interphalangeal joint in osteoarthritis.
References
This article incorporates text from a public domain edition of Gray's Anatomy.
- ^ Gray's Anatomy (1918), see infobox
External links
- Hand kinesiology at the University of Kansas Medical Center
- EatonHand joi-047
- Metacarpophalangeal+joint at eMedicine Dictionary
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Joints and ligaments of the human arm
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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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| Description |
- Anatomy
- head and neck
- cranial
- arms
- torso and pelvis
- legs
- Physiology
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| Disease |
- Arthritis
- acquired
- back
- childhood
- soft tissue
- Congenital
- Injury
- Symptoms and signs
- Examination
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| Treatment |
- Procedures
- Drugs
- rheumatoid arthritis
- gout
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English Journal
- Toward a realistic optoelectronic-based kinematic model of the hand: representing the transverse metacarpal arch reduces accessory rotations of the metacarpophalangeal joints.
- Cocchiarella DM1, Kociolek AM1, Tse CT1, Keir PJ1.
- Computer methods in biomechanics and biomedical engineering.Comput Methods Biomech Biomed Engin.2016 May;19(6):639-47. doi: 10.1080/10255842.2015.1055733. Epub 2015 Jul 9.
- A kinematic model representing the versatility of the human hand is needed to evaluate biomechanical function and predict injury risk in the workplace. We improved upon an existing optoelectronic-based kinematic hand model with grouped metacarpals by defining segmented metacarpals and adding the tra
- PMID 26158485
- Extrinsic versus intrinsic hand muscle dominance in finger flexion.
- Al-Sukaini A1, Singh HP1, Dias JJ2.
- The Journal of hand surgery, European volume.J Hand Surg Eur Vol.2016 May;41(4):392-9. doi: 10.1177/1753193415619774. Epub 2016 Jan 7.
- This study aims to identify the patterns of dominance of extrinsic or intrinsic muscles in finger flexion during initiation of finger curl and mid-finger flexion. We recorded 82 hands of healthy individuals (18-74 years) while flexing their fingers and tracked the finger joint angles of the little
- PMID 26744509
- How the lumbrical muscle contributes to placing the fingertip in space: a three dimensional cadaveric study to assess fingertip trajectory and metacarpophalangeal joint balancing.
- Kamata Y1, Nakamura T2, Tada M3, Sueda S4, Pai DK5, Toyama Y1.
- The Journal of hand surgery, European volume.J Hand Surg Eur Vol.2016 May;41(4):386-91. doi: 10.1177/1753193415597113. Epub 2015 Jul 30.
- Three-dimensional fingertip trajectory was examined under different force levels of the lumbrical muscle to clarify the function of the lumbrical muscle in free index finger motion. The metacarpophalangeal joint balancing effect of the lumbrical muscle in the thumb-up position was also examined. The
- PMID 26228700
Related Links
- Definition of articulationes metacarpophalangeae in the Medical Dictionary. articulationes metacarpophalangeae explanation. Information about articulationes metacarpophalangeae in Free online English dictionary. What is forum ...
- Articulationes metacarpophalangeae information including symptoms, causes, diseases, symptoms, treatments, and other medical and health issues. ... Search Specialists by State and City
Related Pictures
★リンクテーブル★
[★]
- 英
- metacarpophalangeal joint
- ラ
- articulationes metacarpophalangeae
- 同
- MCP関節 MCP joint、MP関節 MP Joint (K)
[★]
- 接合すること、接合部、関節。はっきり発音すること、アーティキュレーション
- 明確に表現すること。分節化。調音、言語音
- 関連づけ