The Anterior Compartment of the Forearm Flashcards

1
Q
A
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1
Q

the muscles of the anterior compartment of the forearm facilitate which movements?

A
  • flexion of the wrist and digits
  • pronation of the forearm at the radio-ulnar joint
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2
Q
A
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3
Q

which superficial flexor forearm muscle is absent in about 20% of people?

A

palmaris longus

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4
Q
A
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5
Q

what is the action of the pronator teres?

A

pronation

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6
Q

apart from flexing the wrist, wich superficial muscle is involved in adduction (ulnar deviation) of the wrist joint?

A

flexor carpi ulnaris

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7
Q

apart from flexing the wrist, which superficial muscle is involved in abduction (radial deviation) of the wrist joint?

A

flexor carpi radialis

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8
Q

Three superficial muscles of the anterior compartment of the forearm are supplied by the blank nerve (C5-T1) with the blank nerve (C8-T1) supplying the flexor carpi ulnaris muscle.

A

Three superficial muscles are supplied by median nerve (C5-T1) with the ulnar nerve (C8-T1) suppling the flexor carpi ulnaris muscle.

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9
Q

what is the anatomical location of the flexor digitorum superficialis (FDS)?

A
  • lies immediately deep to the superficial group of flexors in the forearm and is seen as the only muscle on the intermediate group of the forearm.
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10
Q

the flexor digitorum superficialis has an extensive origin in the forearm, and passes distally down the arm giving rise to how many tendons?

A

4 tendons

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11
Q

to which digits (fingers) are the tendons of the flexor digitorum superficialis (FDS) attached?

A

2-5 digits (no thumb)

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12
Q

on which phalanx are the 4 tendons of the flexor digitorum superficialis (FDS) inserted?

A

middle phalanges of digits 2-5

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13
Q

the flexor digitorum superficialis (FDS) flexes which joints?

A
  • wrist joint
  • metacaropophalangeal joints
  • proximal interphalangeal joints
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14
Q

can the flexor digitorum superficialis (FDS) act on the distal interphalangeal joint?

A

no (FDP) acts on distal

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15
Q

what nerve innervates the flexor digitorum superficialis (FDS)?

A

median nerve C5-T1

16
Q

what is the main action of the brachioradialis muscle?

A

flexion of the elbow

17
Q

which nerve innervates the brachioradialis muscle?

A

radial nerve

18
Q

which muscle is the exception to the rule that all flexors lie in the anterior compartments of the forearm, and that the radial nerve only innervates extensor muscles?

A

brachioradialis

19
Q

label the 3 deep muscles of the anterior forearm

A
20
Q
A
21
Q

all the flexor muscles acting on the wrist and the fingers originate from?

A

medial epicondyle of humerus

22
Q

all of the extensor muscles acting on the wrist and fingers originate from?

A

the lateral epicondyle of the humerus

23
Q

describe the flexor digitorum profundus (FDP)

A

Flexor Digitorum Profundus (FDP)
FDP is a long, thick muscle that lies deeply in the front of the forearm. It also lies more superficially on the medial border and back of the forearm.

24
Q

what is the main action of the FDP on the wrist and finger joints?

A
  • flexion of wrist
  • flexion of finger joints (metacarpophalangeal, distal interphalangeal)
25
Q

what is the nerve supply of the FDP?

A

dual nerve supply:
- medial half supplied by the ulnar nerve
- lateral half is supplied by the median nerve

26
Q

waht does pollicis mean?

A

thumb

27
Q

what does brevis mean?

A

short

28
Q

what does profundus mean?

A

deep

29
Q

what does quadratus mean?

A

square/rectangular

30
Q

The flexor pollicis longus (FPL) is the long flexor of the thumb. Which nerve innervates this muscle?

A

median nerve

31
Q

what is the origin and insertion of the pronator quadratus?

A

Lies deeply in the distal part of the forearm, taking origin from the front of the ulna, and passing across to be inserted into the radius.

32
Q

what is the innervation of the pronator quadratus?

A

median nerve

33
Q

what is the action of the pronator quadratus?

A

Pronator Quadratus works in synergy with the pronator teres muscle and form a powerful pair of pronators at both the proximal and distal radioulnar joints.