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MBBS Anatomy > Muscle Function - Upper Limb > Flashcards

Muscle Function - Upper Limb Flashcards

1
Q

What is the function of the trapezius?

A

Rotates scapula to elevate arm; also elevates , depresses and retracts scapula; extends and rotates head

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2
Q

What is the function of the levator scapulae?

A

Elevates scapula

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3
Q

What is the function of the rhomboids?

A

Elevates and retracts scapula

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4
Q

What is the function of the deltoid?

A

Powerful abduction of the arm beyond 15 degrees

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5
Q

What is the function of the Latissimus dorsi?

A

Powerful addiction, medial rotation and extension of arm

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6
Q

What is the function of the pectoralis major?

A

Powerful adduction, flexion, extension and medial rotation of the arm

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7
Q

What is the function of the pectoralis minor?

A

Rotates and protracted scapula

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8
Q

What is the function of the subclavius?

A

Depresses clavicle and stabilises joint

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9
Q

What is the function of the coracobrchialis?

A

Flexes arm at the shoulder joint

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10
Q

What is the function of the serratus anterior?

A

Protracted and rotates scapula, prevents “winging”

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11
Q

What is the function of the supraspinatus?

A

Initiates abduction of arm (first 15 degrees)

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12
Q

What is the function of the infraspinatus?

A

Lateral rotation of arm

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13
Q

What is the function of the teres minor?

A

Lateral rotation of arm

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14
Q

What is the function of the teres major?

A

Medically rotates and extends arm

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15
Q

What is the function of the subscapularis?

A

Medial rotation of arm

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16
Q

What is the function of the biceps brachii?

A

Flexor of forearm (strong) and arm (weak) and powerful supination

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17
Q

What is the function of the brachialis?

A

Powerful flexor of the forearm

18
Q

What is the function of the triceps brachii?

A

Extension of arm and forearm

19
Q

What is the function of the flexor carpi ulnaris?

A

Flexion and adduction of the wrist

20
Q

What is the function of the palmaris longus?

A

Tightening of palm skin (and a little bit of wrist flexion)

21
Q

What is the function of the flexor carpi radialis?

A

Flexion and abduction of the wrist

22
Q

What is the function of the pronator teres?

A

Pronation of forearm

23
Q

What is the function of the flexor digitorum superficialis?

A

Flexes wrist, metacarpophalangeal joints, first interphalangeal joints

24
Q

What is the function of the flexor digitorum profundus?

A

Flexes wrist, metacarpophalangeal joints, proximal and distal interphalangeal joints

25
Q

What is the function of the flexor pollicis longus?

A

Flexes metacarpophalangeal and interphalangeal joint of digit 1

26
Q

What is the function of the pronator quadratus

A

Pronation of the forearm

27
Q

What is the function of the brachioradialis?

A

Flexes elbow when arm is partially pronated

28
Q

What is the function of the extensor carpi radialis longus and brevis?

A

Extends and abducts the wrist

29
Q

What is the function of the extensor digitorum?

A

Extends digits 2-5 and the wrist

30
Q

What is the function of the extensor digiti minimi?

A

Accessory extensor of digit 5

31
Q

What is the function of the extensor carpi ulnaris?

A

Extends and adducts the wrist

32
Q

What is the function of the anconeus?

A

Abducts ulna during pronation to maintain position of the hand

33
Q

What is the function of the supinator?

A

Supinates forearm

34
Q

What is the function of the abductor pollicis longus?

A

Abducts thumb

35
Q

What is the function of the extensor pollicis brevis and longus?

A

Extends the thumb

36
Q

What is the function of the extensor indicus?

A

Extends digit 2

37
Q

What is the function of the palmaris brevis?

A

Deepens cup of hand

38
Q

What is the function of the adductor pollicis?

A

Adducts the thumb

39
Q

What is the function of the lumbricals?

A

Flexion of MCP joint and extension of IP joints

40
Q

What is the function of the interossei?

A

Abduct (dorsal) and adduct (palmar) fingers, flexes MCP and extends IP joints

MBBS Anatomy (9 decks)

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