Muscular Pt.2 wrist/hand Muscles

Question 1

Define wrist flexion:

Answer 1

the bending of the palm toward the antebrachium

Question 2

Define Wrist extension:

Answer 2

bringing the Dorsum of the hand toward the antebrachium

Question 3

Flexor Carpi Radialis:

Answer 3

origin: medial epicondyl of humerus

Insertion: base on metacarpals

Action: wrist flexion

Question 4

Flexor Digitorum Superficialis:

Answer 4

Origin: medial epicondyl of humerus

Insertion: middle phalanges

Actin: flexes wrist & digits/fingers

Question 5

Flexor Pollicis Longus:

Answer 5

Origin: radius
Insertion: distal phalange of thumb

Action: flexes thumb

Question 6

Flexor Retinaculum:

Answer 6

Band of CT on anterior wrist

Anchors flexor tendons during contraction

Question 7

Carpal Tunnel:

Answer 7

Space b/w carpal wrist bones & flexor reticulumn

Function: passageway for flexor tendons & on nerves

Question 8

Carpal Tunnel Syndrome:

Answer 8

the swelling & pressure on nerves from repetitive motion, pregnancy,diabetes, arthritis

causes numbness & weakness

Question 9

Extensor Carpi Radialis:

Answer 9

Origin: distal humerus

Insertion: base of metacarpals

Action: wrist extension

Question 10

Extensor Digitorum:

Answer 10

Origin: distal humerus

Insertion: dorsal phalanges

Action: extends wrist & digits/fingers

Question 11

Extensor Pollicus Longus & Brevis:

Answer 11

Origin: radius & ulna

Insertion: distal phalange of thumb

Action: extends the thumb