Anatomy of the Hand Flashcards
Give six movements of the thumb
Abduction Adduction Extension Flexion Opposition Reposition
List the major groups of muscles in the hand
Interossei muscles
Lumbricals
Thenar muscles
Hypothenar muscles
Which muscles of the hand are innervated by the median nerve?
Lateral two lumbricals
Thenar muscles
What are the three thenar muscles?
Flexor pollicis brevis
Abductor pollicis brevis
Opponens pollicis
What are the three hypothenar muscles?
Flexor digiti minimi brevis
Abductor digiti minimi
Opponens digiti minimi
Which muscle in the hand has an oblique part and a transverse part?
Adductor pollicis (check this)
What are the actions of the lumbricals?
Flexion of the MCP joints, extension of the IP joints
What are the actions of the interossei muscles?
Dorsal interossei abduct the fingers at the MCP joint
Palmar interossei adduct the fingers at the MCP joint
List the carpal bones
Scaphoid Trapezium Trapezioid Capitate Hamate Triquetrum Pisiform Lunate
What type of joint is the wrist joint?
Ellipsoid synovial joint
What forms the deep border of the carpal tunnel?
Carpal arch:
- tubercle of the scaphoid
- crest of the trapezium
- pisiform
- hook of the hamate
What forms the superficial border of the carpal tunnel?
Flexor retinaculum
Which structures pass through the carpal tunnel?
Flexor pollicis longus tendon
4 flexor digitorum profundus tendons
4 flexor digitorum superficialis tendons
Median nerve
