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Anatomy > Arm & Forearm Muscles > Flashcards

Arm & Forearm Muscles Flashcards

1
Q

Biceps brachii

A

Supinates forearm
When supinate, Flexes forearm
Resists dislocation of shoulder (short head)

Musculocutaneous nerve

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2
Q

Coracobrachialis

A

Flexes & ADducts arm at shoulder joint
Resists dislocation of shoulder joint

Musculocutaneous nerve

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3
Q

Brachialis

A

Flexes forearm at elbow joint

Musculocutaneous joint
Radial nerve (sometimes lateral portions)
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4
Q

Triceps brachii

A

Extends forearm at elbow joint (main)
Resists dislocation of shoulder joint (long head)

Radial nerve

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5
Q

Anconeus

A

Assists triceps in extension of forearm
Stabilizes elbow joint
ABducts ulna during protonation

Radial nerve

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6
Q

Match layers (Superficial, Intermediate, Deep) with anterior forearm muscles?

Protonator teres
Flexor carpi radialis
Flexor digitorum superficialis
Flexor digitorum profundus
Protonator quaratus
Flexor pollicis longus
Palmaris longus
Flexor carpia ulnaris
A

Protonator teres - Superficial layer
Flexor carpi radialis - Superficial layer
Flexor digitorum superficialis - Intermediate layer
Flexor digitorum profundus - Deep layer
Protonator quaratus - Deep layer
Flexor pollicis longus - Deep layer
Palmaris longus - Superficial layer
Flexor carpia ulnaris - Superficial layer

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7
Q

Pronator teres

A

Pronates and flexes forearm at elbow

Median nerve

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8
Q

Flexor carpi radialis

A

Flexes and ABducts hand at wrist

Median nerve

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8
Q

Palmaris longus

A

Flexes hand at wrist
Tenses palmar aponeurosis

Median nerve

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9
Q

Flexor carpi ulnaris

A

Flexes and ADducts hand at wrist

Ulnar nerve

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10
Q

Flexor digitorum superficialis

A

Flexes middle phalanges at proximal interphalangeal joint
Flexes proximal phalanges at metacarpophalangeal joints

Median nerve

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11
Q

Flexor digitorum profundus

A

Flexes distal phalanges at interphalangeal joints (power grip)

Median and ulnar nerves

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12
Q

Flexor pollicis longus

A

Flexes thumb

Median nerve via anterior interosseous nerve

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13
Q

Pronator quadratus

A

Pronates forearm
Deep fibers bind radius and ulna together

Median nerve via anterior interosseous nerve

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14
Q

Brachioradialis

A

Flexes forearm when it is pronated

Radial nerve

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15
Q

Extensor carpi radialis longus

A

Extend and ABduct hand at wrist

Radial nerve

16
Q

Extensor carpi radialis brevis

A

Extend and ABduct hand at wrist

Deep branch of radial nerve

17
Q

Extensor digitorum

A

Extends medial 4 fingers at metacarpophalangeal joints and somewhat at interphalangeal joints

Posterior interroseus (deep branch radial nerve)

18
Q

Entensor digiti minimi

A

Extends 5th finger (pinky) at metacarpophalangeal joint and secondarily at interphalangeal joints

Posterior interroseus nerve (deep branch Radial nerve)

19
Q

Extensor carpi ulnaris

A

Extends and ADducts hand at wrist

Posterior interroseus (deep branch radial)

20
Q

Which are the superficial extensors and which are deep?

Brachioradialis
Extensor carpi radialis brevis
Extensor digitorum
Suppinator
Extensor carpi radialis 
Extensor indicus
Extensor digiti minimi
Extensor carpia ulnaris
Extensor pollicis longus
Abductor pollicis longus
Extensor pollicis brevis
A 
Brachioradialis - Superficial
Extensor carpi radialis brevis - Superficial
Extensor digitorum - Superficial 
Suppinator - Deep
Extensor carpi radialis - Superficial
Extensor indicus - Deep
Extensor digiti minimi - Superficial
Extensor carpia ulnaris - Superficial
Extensor pollicis longus - Deep
Abductor pollicis longus - Deep
Extensor pollicis brevis - Deep
21
Q

Supinator

A

Supinates forearm (bringing radius back to anatomical position)

Deep branch of radial nerve

22
Q

Extensor indicis

A

Independent extension of 2nd finger
Aids in extension of wrist

Posterior interroseus (Deep branch Radial)

23
Q

Abductor pollicis longus

A

Abducts thumb
Extends thumb at carpometacarpal joint

Posterior interosseus (deep branch radial)

24
Q

Extensor pollicis brevis

A

Extends proximal phalynx of thumb at metacarpophalangeal joint and carpometacarpal joint

Posterior interroseus

25
Q

Extensor pollicis longus

A

Extends distal phalynx of thumb at interphalangeal joint, metacarpophalangeal joint and carpometacarpal joint

Posterior interroseus

26
Q

Injury to which nerve causes wrist drop?

a. Musculocutaneous
b. Ulnar
c. Median
d. Radial

A

d. Radial

Anatomy (14 decks)

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