Muscles of the Palm

Question 1

Flexor Sheaths

Answer 1

Location: Around the thends of the flexor digitorum superficialis muscle
Function: Fibrous

Question 2

Flexor Retinaculum

Answer 2

Location: Extending across the wrist
Function: Strong band of connective tissue
Forming the carpal tunnel, contains the tendons of the long flexors to the digits as well as the median nerve

Question 3

Carpal Tunnel Syndrome

Answer 3

The flexor retinaculum amy be cut and resealed to relive the pain, where the median nerve is compressed by swelling in this location

Question 4

Ulnar Artery and Ulnar Nerve

Answer 4

Location: Crossing over the retinaculu on te medial side
Ulnar artery, forming an important anastomosis with the radial artery on the lateral side
Function:

Question 5

THenar Eminence

Answer 5

Location: Located at the base of the thumb
Function:

Question 6

Hypothenar Eminence

Answer 6

Location: Located at the base of the little finger
Function: Each formed by three categories of muscle

Question 7

3 categories of the eminence muscles

Answer 7

Flexor, Abductor, Opponens

Question 8

Flexor Pollicis Brevis

Answer 8

Closes to the midline of the hand
Location: Flexor muscles represented in the thumb. Attaches to the proximal phalanx
Function: Flex the metacarpo-phalangeal joint of the digt

Question 9

Flexor Digiti Minimi

Answer 9

Location: Flexor muscle to the little finger. Attaches to the proximal phalanx
Function: Flex the metacarpo-phalangeal joint of the digit

Question 10

Abductor pollicis Longus and Brevis

Answer 10

Abductor muscles of the thumb
Location: Along the lateral edges of the hand
Function: move the thumb laterally

Question 11

Abductor Digiti Minimi

Answer 11

Location: Along the lateral edges of the hand
Function: Moves the little finger medially

Question 12

Opponens Pollicis

Answer 12

Location: Located btwn the flexor and abductor muscles
Function: Act to flex and rotate the thumb so that it meets the little finger
Allows the thumb to touch, index, long and ring fingers

Question 13

Opponens Digiti Minimi

Answer 13

Location: Located btwn the flexor and abductor muscles
Function: Act to flex and rotae the thumb and little finger so the tips may meet each other.

Question 14

Adductor Pollicis

Answer 14

Location: Muscles attaches to the base of the proximal phalanx
Function: Assists in oppostion of the thumb, composed of an oblique and a transverse head.
Acts to move the thumb toward the palm.

Question 15

Flexor Carpi Radialis and Carpi Ulnaris

Answer 15

Location: Extend no further than the base of the metacarpal bones, and do no pass further into the palm

Question 16

Lumbrical Muscles

Answer 16

There four,
Location: Located deep to the thenar and hypothenar muscles
Arise from the tendons of the flexor digitorum produndus muscle, and insert into the tendons of the extensor digitorum and interossei muscles
Function: Worm like structures, act in waving, flexing the metacarpo-phalangeal joints and extending the interphalangeal joints

Question 17

Dorsal Interossei muscles

Answer 17

4 muscles
Location: Located deep to the thenar and hypothenar muscles. Insert onto the proximal phalanges
Function: abduct the medial digits (Not the thumb)

Question 18

First Dorsal Interosseous muscle

Answer 18

Bluging away from the metacarpal bones of the thumb and index finger, insert on the lateral side of the index finger proximal phalanx.