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Advanced Human Dissection > Muscle Actions and Innervations > Flashcards

Muscle Actions and Innervations Flashcards

1
Q

Innervation of the trapezius

A

spinal accessory nerve (CNXI)

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2
Q

Actions of the trapezius

A
  • elevates, retracts, and depresses scapula
  • extends neck
  • superiorly rotates glenohumeral joint
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3
Q

Innervation of the latissimus

A

thoracodorsal nerve

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4
Q

Actions of the latissimus dorsi

A
  • extension of glenohumeral joint
  • medial rotation of glenohumeral joint
  • adduction of glenohumeral joint
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5
Q

Innervation of the rhomboids

A

dorsal scapular nerve

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6
Q

Actions of the rhomboids

A

retraction and elevation of scapula

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7
Q

Levator scapulae innervation

A

dorsal scapular nerve

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8
Q

Actions of the levator scapulae

A

elevates scapula only

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9
Q

Actions of the splenius capitis

A

bilateral: head extension

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10
Q

actions of the splenius cervicis

A

unilateral: lateral flexion and rotation of head

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11
Q

Erector spinae innervation

A

dorsal rami of spinal nerves

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12
Q

Actions of erector spinae

A

chief extensor of the vertebral column

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13
Q

Actions of the levator costarum

A

elevate ribs for deep inspiration

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14
Q

Deltoid innervation

A

axillary nerve

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15
Q

Actions of the deltoid

A
  • flexion and medial rotation of glenohumeral joint
  • abduction
  • extension and lateral rotation of glenohumeral joint
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16
Q

Supraspinatus innervation

A

suprascapular nerve

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17
Q

supraspinatus actions

A

initiates first 15 degrees of abduction

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18
Q

infraspinatus innervation

A

suprascapular nerve

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19
Q

infraspinatus actions

A

laterally rotates glenhohumeral joint

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20
Q

teres minor innervation

A

axiillary nerve

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21
Q

teres minor actions

A

laterally rotates glenohumeral joint

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22
Q

Subscapularis innervation

A

subscapular nerve (upper/lower)

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23
Q

subscapularis actions

A

medially rotates glenohumeral joint

24
Q

Innervation of teres major

A

lower subscapular nerve

25
Q

Actions of teres major

A
  • adduction

- medially rotates glenohumeral joint

26
Q

Innervation of serratus anterior

A

long thoracic nerve

27
Q

Actions of serratus anterior

A

abducts and rotates scapula upward

28
Q

Serratus posterior superior actions

A

elevates upper ribs

29
Q

serratus posterior inferior actions

A

pulls down lower ribs

30
Q

External intercostals actions

A

aids forced inspiration by elevating ribs

31
Q

Rectus capitis posterior major and minor actions

A

extends head and neck

32
Q

Obliqus capitis inferior actions

A

rotates head

33
Q

Obliqus capitis superior actions

A
  • bilateral: extends neck

- unilateral: lateral flexion to same side

34
Q

Innervation of Gluteus maximus

A

inferior gluteal nerve

35
Q

actions of gluteus maximus

A
  • extends thigh and trunk

- laterally rotates hip joint

36
Q

Innervation of gluteus medius and minimus

A

superior gluteal nerve

37
Q

Actions of gluteus medius and minimus

A

-abduct hip joint when contralateral lower limb is raised

38
Q

Actions of the piriformis

A

laterally rotates and abducts thigh

39
Q

Actions of the gemellus superior, obturator internus, gemellus inferior, quadratus femoris

A

laterally rotate thigh

40
Q

Actions of biceps femoris, semitendinosus, and semimembranosus

A
  • extension of hip joint

- flexion of knee joint

41
Q

Gastrocnemius innervation

A

tibial nerve

42
Q

gastrocnemius actions

A
  • plantar flexion of foot

- knee flexion

43
Q

Soleus innervation

A

tibial nerve

44
Q

soleus actions

A

plantar flexion of foot

45
Q

Innervation of tibialis posterior

A

tibial nerve

46
Q

Actions of the tibialis posterior

A
  • inversion and assists in the plantar flexion of the foot at the ankle
  • major role in supporting the medial arch of the foot
47
Q

Innervation of flexor hallucis longus

A

tibial nerve

48
Q

Actions of the flexor hallucis longus

A
  • inversion and assists in the plantar flexion of the foot at the ankle
  • flex the great toe
49
Q

Flexor digitorum longus innervation

A

tibial nerve

50
Q

Actions of the digitorum longus innervation

A
  • inversion and assists in the plantar flexion of the foot at the ankle
  • flexion of phalanges
51
Q

Fibularis longus and brevis innervation

A

superficial fibular nerve

52
Q

Actions of the fibularis longus and brevis

A

foot eversion

53
Q

Triceps brachii long head actions

A

-extension of the arm at the shoulder, adduction of the arm at the shoulder, extension of the forearm at the elbow

54
Q

Triceps brachii innervation

A

radial nerve

55
Q

Actions of the triceps brachii lateral head

A

extension of the forearm at the elbow

Advanced Human Dissection (11 decks)

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