Thenar Muscles Of Hand Flashcards
What are the thenar muscles? (3)
Opponens pollicis, abductor pollicis brevis, flexor pollicis brevis
Origin of opponens pollicis
Tubercle of trapezium + associated flexor retinaculum
Insertion of opponens pollicis
Lateral margin of 1st metacarpal
Action of opponens pollicis
Opposes the thumb
Innervation of opponens pollicis
Median nerve
Origin of abductor pollicis brevis
Tubercle of scaphoid and trapezium
Insertion of abductor pollicis brevis
Lateral side of proximal phalanx of thumb
Action of abductor pollicis brevis
Abducts the thumb
Innervation of abductor pollicis brevis
Median nerve
Origin of flexor pollicis brevis
Tubercle of trapezium
Insertion of flexor pollicis brevis
Base of proximal phalanx of thumb
Action of flexor pollicis brevis
Flexes MCPJ of thumb
Innervation of flexor pollicis brevis
Median nerve, deep head by ulnar nerve