Muscles of the Hand Flashcards
Posterior interosseous artery
Anterior interosseous artery
Blood of Extensor Indicis
Innervation of Extensor Indicis
Posterior interosseous nerve (C7-8)
What type of muscle is abductor pollics brevis?
Thenar/Intrinsic Muscle
What type of muscle is flexor pollicis brevis?
Thenar/Intrinsic Muscle
What type of muscle is the opponens pollicis?
Thenar/Intrinsic Muscle
What is the common innervation of thenar muscles?
Recurrent branch of median nerve (C8, T1)
What type of muscle is Dorsal Interossei?
Interossei Muscle
What type of muscle is Palmar Interossei?
Interossei Muscle
What is the innervation of Radial Lumbrical Muscles?
Median Nerve
What is the innervation of the Ulnar Lumbrical Muscles?
Ulnar Nerve
Function of the Lumbrical muscles?
Flex MCP Joints of digits 2-5 Extend IP joints of digits 2-5
Flexor retinaculum Palmar Aponeurosis
Origin of Palmaris Brevis
Skin on medial side of palm
Insertion of Palmaris Brevis
Tenses skin on palm
Action of Palmaris Brevis
Posterior surface of distal 1/3 of ulna and interosseous membrane
Origin of Extensor Indicis
Extensor expansion of second finger (index)
Insertion of Extensor Indicis
- Independent extension of 2nd finger - Helps with wrist extension
Action of Extensor Indicis