compartments and innervation Flashcards

1
Q

superficial muscles of the back - extrinsic

A
  • trapezius (most superficial)
  • latissimus dorsi
  • levator scapulae
  • rhomboid major
  • rhomboid minor
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2
Q

innervation of trapezius

A

acessory nerve and C3 and C4 spinal nerves

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3
Q

actions of trapezius

A
  • elevates the scapula
  • rotates the scapula
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4
Q

innervation of the latissimus dorsi

A

thoracodorsal nerve

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5
Q

action of the latissimus dorsi

A

extends, abducts, and medially rotates the upper limb

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6
Q

innervation of the levator scapulae

A

dorsal scapula nerve

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7
Q

actions of the levator scapulae

A

elevates the scapula

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8
Q

innervation of the rhomboid major

A

dorsal scapula nerve

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9
Q

actions of the rhomboid major

A

retracts and rotates scapula

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10
Q

innvervation of the rhomboid minor

A

dorsal scapula nerve

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11
Q

actions of the rhomboid minor

A

retracts and rotates the scapula

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12
Q

superficial muscles of the back - intrinsic

A
  • splenius capitis
  • splenius cervices
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13
Q

innervation of the splenius capitis

A

posterior rami of spinal nerves C3 and C4

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14
Q

action of splenius capitis

A

rotate head to the same side

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15
Q

innervation of splenius cervices

A

posterior rami of the lower cervical spinal nerves

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16
Q

actions of splenius cervices

A

rotate the head to the same side

  • two splenius muscle work to extend
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17
Q

intermediate muscles of the back - intrinsic (erector spinae muscles)

A
  • iliocostalis
  • longissimus
  • spinalis
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18
Q

innervation of the iliocostalis

A

posterior rami of the spinal nerves

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19
Q

actions of the iliocostalis

A

unilaterally flex the vertebral column and bilaterally to extend the vertebral column and head

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20
Q

innervation of longissimus

A

posterior rami of the spinal nerves

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21
Q

actions of the longissimus

A

unilaterally to laterally flex the spinal column and bilaterally to extend the vertebral column and head

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22
Q

innervation of the spinalis

A

posterior rami of the spinal nerves

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23
Q

actions of the spinalis

A

acts unilaterally to laterally flex the vertebral column and bilaterally to extend the vertebral column and neck

  • erector spinae are the major extensors of the
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24
Q

deep muscles of the back - intrinsic (transversospinalis)

A
  • semispinalis
  • multifidus
  • rotators
  • found in the groove between the
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25
Q

innervation of the semispinalis

A

posterior rami of the spinal nerves

26
Q

actions of the semispinalis

A

extends and contralaterally rotates the head and spinal column

27
Q

innervation of the multifidus

A

posterior rami of the spinal nerves

28
Q

actions of the multifidus

A

stabilises the vertebral column

29
Q

innervation of the rotators

A

posterior rami of the spinal nerves

30
Q

actions of the rotators

A

stabilises the vertebral column and has a proprioceptive function

31
Q

intrinsic muscles of the shoulder

A
  • deltoid
  • teres major
32
Q

innervation of the deltoid

A

axillary nerve

33
Q

actions of the deltoid

A
  • major abductor of the arm
  • anteior part is involved in flexion and medial rotation
  • posterior part is involved in extension and lateral rotation
34
Q

innervation of the teres major

A

lower subscapular nerve

35
Q

actions of the teres major

A

adducts and extends at the shoulder, medially rotates the arm

36
Q

rotator cuff muscles

A
  • supraspinatus
  • infraspinatus
  • subscapularis
  • teres minor
37
Q

innervation of the supraspinatus

A

suprascapular nerve

38
Q

action of the supraspinatus

A

abducts the arm

39
Q

innervation of the infraspinatus

A

suprascapular nerve

40
Q

action of the infraspinatus

A

laterally rotates the arm

41
Q

innervation of the subscapularis

A

upper and lower subscapular nerves

42
Q

actions of the subscapularis

A

medially rotates the arm

43
Q

innervation of the teres minor

A

axillary nerve

44
Q

actions of the teres minor

A

laterally rotates the arm

45
Q

muscles of the upper arm - anterior

A
  • biceps brachii
  • brachialis
  • coracobrachialis
46
Q

innervation of the biceps brachii

A

musculocutaneous nerve

47
Q

actions of the biceps brachii

A

supination of the forearm and flexes the arm at the elbow and shoulder

48
Q

innervation of coracobrachialis

A

musculocutaneous nerve

49
Q

action of the coracobrachialis

A

flexion of the arm at the shoulder and weak adduction

50
Q

innervation of the brachialis

A

musculocutaneous nerve

51
Q

action of the brachialis

A

flexion at the elbow

52
Q

muscle of the upper arm - posterior

A
  • triceps brachii
  • anconeous
53
Q

innervation of the triceps brachii

A

radial nerve

54
Q

action of the triceps brachii

A

extension of the arm at the elbow

55
Q

innervation of the anconeous

A

radial nerve

56
Q

action of the ancaeoneus

A

extends and stabilises the arm at the elbow joint

57
Q

anterior muscles of the forearm - superficial

A
  • flexor carpi ulnaris
  • palmaris longus
  • flexor carpi radialis
  • pronator teres
58
Q

innervation of flexor carpi ulnaris

A

ulnar nerve

59
Q

actions of flexor carpi ulnaris

A

flexion and adduction at the wrist

60
Q

innervation of palmaris longus

A

median nerve

61
Q

innervation of palmaris longus

A

median nerve

62
Q
A