Volar aspect of right hand

Superficial structures of palm, close-up view

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Image #101-3

Volar aspect of right hand

Superficial structures of palm, close-up view

The specimen is the same as shown in 101-1. Details of the origin of the palmaris brevis muscle are shown. This muscle arises from transverse fibres which lie deep to the longitudinal fibres of the palmar aponeurosis.

1. Palmar aponeurosis (fibrous septa which extended between dermis and palmar aponeurosis remain as ridges on the aponeurosis)
2. Proper palmar digital nerves of median nerve
3. Transverse fascicle of palmar aponeurosis
4. Proper palmar digital nerve of median nerve (to thumb)
5. Proper palmar digital artery (to thumb)
6. Anastomotic loop between branches of radial and median nerves
7. Terminal branch of superficial branch of radial nerve
8. Pacinian corpuscles
9. Abductor pollicis brevis muscle (covered by thenar fascia)
10. Palmar cutaneous branch of median nerve
11. Transverse fascicle of palmar aponeurosis (area of origin of palmaris brevis muscle)
12. Palmaris brevis muscle
13. Cutaneous branches of of ulnar nerve
14. Superficial fascia
15. Flexor digiti minimi muscle (covered by hypothenar fascia)
16. Proper palmar digital nerves of ulnar nerve
17. Ligament of digital sheath V