Muscles of the Palm Flashcards Preview

Anatomy Exam 3 > Muscles of the Palm > Flashcards

Flashcards in Muscles of the Palm Deck (18)
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1

Flexor Sheaths

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

2

Flexor Retinaculum

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

3

Carpal Tunnel Syndrome

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

4

Ulnar Artery and Ulnar Nerve

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

5

THenar Eminence

Location: Located at the base of the thumb
Function:

6

Hypothenar Eminence

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

7

3 categories of the eminence muscles

Flexor, Abductor, Opponens

8

Flexor Pollicis Brevis

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

9

Flexor Digiti Minimi

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

10

Abductor pollicis Longus and Brevis

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

11

Abductor Digiti Minimi

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

12

Opponens Pollicis

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

13

Opponens Digiti Minimi

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.

14

Adductor Pollicis

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.

15

Flexor Carpi Radialis and Carpi Ulnaris

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

16

Lumbrical Muscles

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

17

Dorsal Interossei muscles

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

18

First Dorsal Interosseous muscle

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