Thenar Flashcards
What muscles make up the thenar muscles?
Flexor pollucis brevis
Opponens pollucis
Abductor pollucis brevis
Which nerve innervates the thenar muscles?
Median nerve
What is the origin of flexor pollucis brevis?
Trapezium tubercle
What is the insertion of flexor pollucis brevis?
Base thumb proximal phalanx
What is the action of flexor pollucis brevis?
Flex MCPJ thumb
What is the innervation of flexor pollucis brevis?
Median nerve
What is the origin of opponens pollucis?
Trapezium tubercle
What is the insertion of opponens pollucis?
Lateral metacarpal
What is the action of opponens pollucis?
Oppose thumb
- medial rotation
- flex metacarpal
What is the innervation of opponens pollucis?
Median nerve
What is the origin of abductor pollucis brevis?
Trapezium + scaphoid tubercles
What is the insertion of abductor pollucis brevis?
Lateral proximal phalanx of thumb
What is the action of abductor pollucis brevis?
Abduct thumb
What is the innervation of abductor pollucis brevis?
Median nerve
