Muscles of the Hand + Fingers Flashcards
Where do muscles of the hand + fingers exist?
entirely within the forearm, making them EXTRINSIC muscles of the hand.
What crosses the wrist?
Tendons inside synovial tendon sheaths
What muscles flex the fingers and thumb? (2)
Flexor pollicus longus + Flexor digitorum profundus (deep anterior)
What muscles move the thumb? (3)
Extensor pollicis longus, Abductor pollicis longus + Extensor pollicis brevis (deep posterior)
What muscles flex the fingers and thumb? (3)
Flexor digitorum superficialis, Flexor pollicus longus + Flexor digitorum profundis (middle anterior)
What muscles extend the fingers? (2)
Extensor digitorum, Extensor digiti minimi (middle posterior)
What is the Extensor retinaculum?
A wide band of connective tissue inside a tendon sheath. It stabilizes tendons of extensor muscles from the posterior surface of the wrist.
What is the Flexor retinaculum?
A wide band of connective tissue inside a tendon sheath. It stabilizes tendons of flexor muscles from the anterior surface of the wrist.
What are the Intrinsic muscles of the hand / their function?
Muscles that move he metacarpals and phalanges [orginate and insert there as well]
How many intrinsic muscles of the thumb are there? How many can you name?
Adductor Pollicis, Flexor Pollicis Brevis, Opponens pollicis, Abductor pollicis brevis
How many muscles of the hand are there on the palmar side? How many can you name?
Lubricals, Palmar Interosseus, First dorsal Interosseus, Abductor digiti minimi, Flexor digiti minimi brevis, Opponens digiti minimi, Palmaris brevis.
How many muscles of the hand are there on the posterior side? How many can you name?
2.
First dorsal interosseus, Abductor digiti minimi.
