短母指外転筋
WordNet
- a muscle that draws a body part away from the median line (同)abductor_muscle
- pull away from the body; "this muscle abducts"
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Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/10/01 09:59:06」(JST)
[Wiki en表示]
| Abductor pollicis brevis muscle |
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Abductor pollicis brevis visible at center right.
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| Details |
| Latin |
musculus abductor pollicis brevis |
| Origin |
Transverse carpal ligament, the scaphoid and trapezium[1] |
| Insertion |
Radial base of proximal phalanx of thumb and the thumb extensors[1] |
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Artery
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Superficial palmar arch |
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Nerve
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Recurrent branch of the median nerve |
| Actions |
Abduction of the thumb by acting across the carpometacarpal joint and the metacarpophalangeal joint. It also assists in opposition and extension of the thumb. |
| Antagonist |
Adductor pollicis muscle |
| Identifiers |
| Gray's |
p.461 |
Dorlands
/Elsevier |
m_22/12548307 |
| TA |
A04.6.02.054 |
| FMA |
37373 |
| Anatomical terms of muscle |
The abductor pollicis brevis is a muscle in the hand that functions as an abductor of the thumb.
Contents
- 1 Structure
- 2 Innervation
- 3 Actions
- 4 Additional images
- 5 References
- 6 External links
Structure
The abductor pollicis brevis is a flat, thin muscle located just under the skin. It is a thenar muscle, and therefore contributes to the bulk of the palm's thenar eminence.
It originates from the flexor retinaculum of the hand, the tubercle of the scaphoid bone, and additionally sometimes from the tubercle of the trapezium.
Running lateralward and downward, it is inserted by a thin, flat tendon into the lateral side of the base of the first phalanx of the thumb and the capsule of the metacarpophalangeal joint.
Innervation
The abductor pollicis brevis is innervated by the recurrent branch of the median nerve. C8/T1
Actions
Abduction of the thumb is defined as the movement of the thumb anteriorly, a direction perpendicular to the palm. The abductor pollicis brevis does this by acting across both the carpometacarpal joint and the metacarpophalangeal joint.
It also assists in opposition and extension of the thumb.
Additional images
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Nerves of the left upper extremity
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Abductor pollicis brevis muscle
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Abductor pollicis brevis muscle
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Abductor pollicis brevis muscle
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Abductor pollicis brevis muscle
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Abductor pollicis brevis muscle
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Abductor pollicis brevis muscle
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Abductor pollicis brevis muscle
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Abductor pollicis brevis muscle
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Abductor pollicis brevis muscle
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Abductor pollicis brevis muscle
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Muscles of hand. Cross section.
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References
This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
- ^ a b Eatonhand - Abductor Pollicis Brevis
External links
- 772145152 at GPnotebook
- PTCentral
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Muscles of the human arms
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| Shoulder |
- deltoid
- rotator cuff
- supraspinatus
- infraspinatus
- teres minor
- subscapularis
- teres major
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| fascia: |
- deltoid fascia
- supraspinous fascia
- infraspinous fascia
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Arm
(compartments) |
| anterior |
- coracobrachialis
- biceps
- brachialis
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| posterior |
- triceps brachii
- anconeus
- articularis cubiti
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| fascia |
- axillary sheath
- axillary fascia
- brachial fascia
- intermuscular septa
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| other |
- spaces
- quadrangular space
- triangular space
- triangular interval
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| Forearm |
| anterior |
| superficial: |
- pronator teres
- palmaris longus
- flexor carpi radialis
- flexor carpi ulnaris
- flexor digitorum superficialis
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| deep: |
- pronator quadratus
- flexor digitorum profundus
- flexor pollicis longus
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| posterior |
| superficial: |
- mobile wad
- brachioradialis
- extensor carpi radialis longus and brevis
- extensor digitorum
- extensor digiti minimi
- extensor carpi ulnaris
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| deep: |
- supinator
- anatomical snuff box
- abductor pollicis longus
- extensor pollicis brevis
- extensor pollicis longus
- extensor indicis
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| fascia |
- bicipital aponeurosis
- common tendons
- antebrachial fascia
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| other |
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| Hand |
| lateral volar |
- thenar
- opponens pollicis
- flexor pollicis brevis
- abductor pollicis brevis
- adductor pollicis
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| medial volar |
- hypothenar
- opponens digiti minimi
- flexor digiti minimi brevis
- abductor digiti minimi
- palmaris brevis
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| intermediate |
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| fascia |
| posterior: |
- extensor retinaculum
- extensor expansion
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| anterior: |
- flexor retinaculum
- palmar aponeurosis
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Index of muscle
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| Description |
- Anatomy
- head
- neck
- arms
- chest and back
- diaphragm
- abdomen
- genital area
- legs
- Muscle tissue
- Physiology
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| Disease |
- Myopathy
- Soft tissue
- Connective tissue
- Congenital
- abdomen
- muscular dystrophy
- Neoplasms and cancer
- Injury
- Symptoms and signs
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| Treatment |
- Procedures
- Drugs
- anti-inflammatory
- muscle relaxants
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UpToDate Contents
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English Journal
- A comparison of the excitability of motor axons innervating the APB and ADM muscles.
- Murray JE, Jankelowitz SK.SourceDepartment of Neurology, Royal Prince Alfred Hospital, Sydney, Australia.
- Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology.Clin Neurophysiol.2011 Nov;122(11):2290-3. Epub 2011 May 10.
- OBJECTIVE: Threshold tracking allows the non-invasive assessment of axonal excitability. This study aimed to determine whether axonal excitability of the motor axons of the median nerve (to APB) and ulnar nerve (to ADM) to the small muscles of the hands is sufficiently similar to be interchangeable;
- PMID 21561804
- Abnormal facilitatory mechanisms in motor cortex of migraine with aura.
- Brighina F, Cosentino G, Vigneri S, Talamanca S, Palermo A, Giglia G, Fierro B.SourceDipartimento di Biomedicina Sperimentale e Neuroscienze Cliniche (BioNeC), University of Palermo, Via Gaetano La Loggia, 1, 90129 Palermo, Italy.
- European journal of pain (London, England).Eur J Pain.2011 Oct;15(9):928-35. Epub 2011 May 6.
- Experimental evidence suggests impairment of inhibitory intracortical circuits in migraine, while not much is known about activity of facilitatory intracortical circuits. In the present work we evaluated the effects of high frequency-repetitive transcranial magnetic stimulation (hf-rTMS) on the acti
- PMID 21530338
Japanese Journal
- 特発性手根管症候群重症例における短母指外転筋機能の一期的再建は必要か?
- 浜中 一輝,奥津 一郎,田邊 恒成,吉田 綾
- 日本手の外科学会雑誌 = The Journal of Japanese Society for Surgery of the Hand 26(3), 147-151, 2010-05-17
- NAID 10026286829
- 脳波・筋電図の臨床 糖尿病患者でみた虫様筋/骨間筋法と通常の短母指外転筋/小指外転筋法による運動遠位潜時の比較
Related Links
- Abductor Pollicis Brevis Abductor Pollicis Longus Adductor Pollicis Anconeus Biceps Brachii Brachialis Brachioradialis Coracobrachialis Deltoid Extensor Carpi Radialis Brevis Extensor Carpi Radialis Longus Extensor Carpi Ulnaris ...
- The abductor pollicis brevis muscle is located in the hand between the wrist and the base of the thumb. It originates from the flexor retinaculum and the tubercles of the scaphoid and trapezium bones. It inserts in the outer side of the ...
★リンクテーブル★
[★]
- 英
- abductor pollicis brevis (K), APB, abductor pollicis brevis muscle
- 関
- 母指球筋、上肢の筋、手の筋、長母指外転筋
起始
停止
神経
機能
[★]
短い
- 関
- brief、short
[★]
外転筋
- 関
- abductor muscle