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MBBS Anatomy > Muscle Innervation - Upper Limb > Flashcards

Muscle Innervation - Upper Limb Flashcards

1
Q

What is the innervation of the trapezius?

A

Cranial nerve 6, C3, C4

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2
Q

What is the innervation of the elevator scapulae?

A

C3, C4 and dorsal scapular nerve (C4, C5)

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3
Q

What is the innervation of the rhomboids?

A

Dorsal scapular nerve (C4,C5)

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4
Q

What is the innervation of the deltoid?

A

Axillary nerve (C5, C6)

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5
Q

What is the innervation of the latissimus dorsi?

A

Thoracodorsal nerve (C6, C7, C8)

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6
Q

What is the innervation of the pectorals major?

A

Medial and lateral pectoral nerves (C5- T1)

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7
Q

What is the innervation of the pectorals minor?

A

Medial pectoral nerve (C5-T1)

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8
Q

What is the innervation of the subclavius?

A

Nerve to subclavius (C5, C6)

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9
Q

What is the innervation of the coracobrachialis?

A

Musculocutaneous nerve (C5-C7)

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10
Q

What is the innervation of the serrates anterior?

A

Long thoracic nerve (C5-C7)

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11
Q

What is the innervation of the supraspinatus?

A

Suprascapular nerve (C5, C6)

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12
Q

What is the innervation of the infraspinatus?

A

Suprascapular nerve (C5,C6)

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13
Q

What is the innervation of teres minor?

A

Axillary nerve (C5, C6)

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14
Q

What is the innervation of teres major?

A

Inferior sub scapular nerve (C5, C6)

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15
Q

What is the innervation of the subscapularis?

A

Superior and inferior subscapular nerves (C5-C7)

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16
Q

What is the innervation of the biceps brachii?

A

Musculocutaneous nerve (C5, C6)

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17
Q

How many roots are there in the brachial plexus and what are they?

A

5 (C5-T1)

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18
Q

What branches come off of the roots and what roots contribute to each of them?

A

Dorsal scapular nerve - C5
Contribution to phrenic nerve - C5
Long thoracic nerve - C5-C7

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19
Q

Where are the roots of the brachial plexus located?

A

Between the anterior and mid scalene

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20
Q

How many trunks are there in the brachial plexus?

A

3 - Superior, middle and inferior

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21
Q

What branches come off each of the trunks and what trunk do they originate from?

A

Suprascapular nerve and nerve to subclavius - Superior (C5-C6)

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22
Q

Where are the trunks located?

A

By the first rib

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23
Q

How many divisions are there?

A

6

24
Q

How many cords are there?

A

3 - Lateral, posterior, medial

25
Q

How many branches from the cords?

A

8

26
Q

What branches are there from the lateral cord?

A

Lateral pectoral nerve (C5-C7)

27
Q

What branches are there from the medial cord?

A

Medial pectoral nerve, medial brachial cutaneous nerve and medial antebrachial cutaneous nerve (C8-T1)

28
Q

What branches are there from the posterior cord?

A

Axillary nerve (C5-C6)
Superior subscapular nerve (C5-C6)
Thoracodorsal nerve (C6-C8)
Inferior subscapular nerve (C5-C6)

29
Q

How many terminal nerves are there?

A

4

30
Q

Where are the divisions, cord and terminal nerves located?

A

In the axilla

31
Q

What terminal nerves originate from the anterior divisions?

A 
Musculocutaneous nerve (C5-C7)
Median nerve (C5, C6-T1)
Ulnar nerve (C7, C8-T1)
32
Q

What terminal nerves originate from the anterior divisions?

A

Radial nerve (C5-T1)

33
Q

What is the innervation of the brachialis?

A 
Musculocutaneous nerve (C5-C6)
Radial nerve (C7)
34
Q

What is the innervation of the triceps brachii?

A

Radial nerve (C6-C8)

35
Q

What nerve innervates all muscles in the anterior compartment of the arm?

A

Musculocutaneous nerve (C5-C7)

36
Q

What nerve innervates all muscles in the posterior compartment of the arm and forearm?

A

Radial nerve

37
Q

What is the innervation of the flexor carpi ulnaris?

A

Ulnar nerve (C7-T1)

38
Q

What is the innervation of the palmar is longus?

A

Median nerve (C7, C8)

39
Q

What is the innervation of the flexor carpi radialis?

A

Meidan nerve (C6, C7)

40
Q

What is the innervation of the pronator teres?

A

Median nerve (C6, C7)

41
Q

What is the innervation of the flexor digitorum superficialis?

A

Median nerve (C8, T1)

42
Q

What is the innervation of the flexor digitorum profundus?

A

Median nerve (C7, C8) for lateral half and medial half innervated by ulnar nerve (C8, T1)

43
Q

What is the innervation of the flexor pollicis longus?

A

Median nerve (C7, C8)

44
Q

What is the innervation of the pronator quadratus?

A

Median nerve (C7, C8)

45
Q

What nerve are all muscles in the posterior compartment of the forearm innervated by?

A

Radial nerve

46
Q

What nerve also innervates the deep layer of the posterior arm?

A

posterior interosseous

47
Q

What is the innervation of the palmaris brevis?

A

Superficial branch of ulnar nerve (C8, T1)

48
Q

What is the innervation of the thenar muscles?

A

Recurrent branch of the median nerve (C8, T1)

49
Q

What is the innervation of the hypothenar muscles?

A

Deep branch of the ulnar nerve (C8, T1)

50
Q

What is the innervation of the adductor pollicis?

A

Deep branch of ulnar nerve (C8, T1)

51
Q

What is the innervation of the lumbricals?

A

Digits 2 and 3 by digital branches of the median nerve

Digits 4 and 5 by deep branch of ulnar nerve

52
Q

What is the innervation of the interossei?

A

Deep branch of the ulnar nerve (C8, T1)

53
Q

Describe the innervation of the deep branch of the ulnar nerve

A

Mostly motor.

All hand muscles except for the three thenar muscles and two lateral lumbricals

54
Q

Describe the innervation of the superficial branch of the ulnar nerve

A

Mostly sensory.

Medial 1.5 digits

55
Q

Describe the innervation of the recurrent branch of the median nerve

A

Motor to the thenar muscles

56
Q

Describe the innervation of the palmar digital nerves from the median nerve

A

Motor to the lateral two lumbricals

Sensory to the palmar surface and tip of dorsal surface of the lateral 3.5 digits

57
Q

Describe the innervation of the superficial branch of the radial nerve

A

sensory to the lateral aspect of the palm, and the dorsal aspect of the lateral 3.5 digits, except nail beds

MBBS Anatomy (9 decks)

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