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Bassett Collection of Stereoscopic Images of Human Anatomy

Volar aspect of right hand

Volar and dorsal interosseous muscles

Image #105-1

KEYWORDS: Hand and fingers, Vasculature.

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Volar aspect of right hand
Volar and dorsal interosseous muscles
The adductor pollicis muscle has been removed. The volar interosseous fascia and transverse capsular ligaments have been cut away to display the interosseous muscles. The first dorsal interosseous muscle has been detached from its origin on the first metacarpal bone. An independent, small muscle (8) remains attached to the first metacarpal. This corresponds in origin and insertion with the regular volar interosseous muscles.
1 . Lumbrical muscle I
2 . Head of metacarpal II
3 . Metacarpophalangeal joint capsule
4 . Articular branches of deep branch of ulnar nerve
5 . Dorsal interosseus muscle II
6 . Anterior interosseous muscle I
7 . Dorsal interosseous muscle I
8 . Muscle with origin and insertion corresponding to that of other anterior interossei
9 . Metacarpal I
10 . Princeps pollicis artery
11 . Radial artery
12 . Area of insertion of flexor carpi radialis muscle
13 . Metacarpotrapezial joint capsule
14 . Transverse carpal ligament (cut)
15 . Upper pointer: Area of origin of flexor pollicis brevis muscle (deep head) Lower pointer: Origin of adductor pollicis muscle (oblique head)
16 . Hamulus of hamate bone
17 . Deep branch of ulnar nerve (branches to interosseous muscles visible but not labeled)
18 . Deep palmar arch
19 . Deep anterior branch ulnar artery (cut off)
20 . Anterior metacarpal artery
21 . Dorsal interosseous muscle III
22 . Anterior interosseous muscle II
23 . Dorsal interosseous muscle IV
24 . Left pointer: Anterior interosseous muscle III Right pointer: Articular branch of deep branch of ulnar nerve
25 . Anterior accessory ligament