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Anatomy > O & I: Neck & Thorax Muscles > Flashcards

O & I: Neck & Thorax Muscles Flashcards

1
Q

Origin: Serratus Posterior superior

A

Nuchal Ligament, spinous processes of C7-T3

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2
Q

Insertion: Serratus Posterior Superior

A

Superior borders of ribs 2 - 5 lateral to their angles

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3
Q

Innervation: Serratus Posterior Superior

A

2nd - 5th intercostal nerves (anterior rami)

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4
Q

Action: Serratus Posterior Superior

A

proprioception (elevate ribs)

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5
Q

Origin: Serratus Posterior Inferior

A

spinous processes of T11 - L2 vertebrae

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6
Q

Insertion: Serratus Posterior Inferior

A

inferior borders of ribs 9 - 12 lateral to their angles

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7
Q

Innervation: Serratus Posterior Inferior

A

anterior rami to T9 - T12 thoracic spinal nerves

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8
Q

Action: Serratus Posterior Inferior

A

proprioception (depress ribs)

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9
Q

Origin: Levator Costarum

A

Transverse processes of C7 - T11

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10
Q

Insertion: Levator Costarum

A

subjacent ribs between tubercle and angle

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11
Q

Innervation: Levator Costarum

A

posterior primary rami of C8 - T11 nerves

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12
Q

Action: Levator Costarum

A

elevate ribs

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13
Q

Origin: External Intercostal

A

inferior border of ribs

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14
Q

Insertion: External Intercostal

A

Superior border of ribs below

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15
Q

Innervation: External Intercostal

A

intercostal nerve (T1- T11)

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16
Q

Action: External Intercostal

A

Elevate ribs during forced inspiration

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17
Q

Origin: Internal Intercostal & Innermost Intercostal

A

inferior border of ribs

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18
Q

Insertion: Internal Intercostal & Innermost Intercostal

A

Superior border of ribs below

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19
Q

Innervation: Internal Intercostal & Innermost Intercostal

A

intercostal nerve (T1- T11)

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20
Q

Action: Internal Intercostal & Innermost Intercostal

A

During active (forced) respiration Interosseous part: depresses ribs

Intercondral part: elevates ribs

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21
Q

Origin: Subcostal

A

Internal surface of lower ribs near their angles

22
Q

Insertion: Subcostal

A

superior borders of 2nd or 3rd ribs below

23
Q

Innervation: Subcostal

A

intercostal nerve (T1- T11)

24
Q

Action: Subcostal

A

Depresses ribs

probably act in same mannar intercostal muscles?

25
Q

Origin: Transversus Thoracis

A

posterior surface of lower sternum

26
Q

Insertion: Transversus Thoracis

A

internal surface of costal cartilages 2-6

27
Q

Innervation: Transversus Thoracis

A

intercostal nerve (T1- T11)

28
Q

Action: Transversus Thoracis

A

weekly depress ribs proprioception?

29
Q

Origin: Sternocleidomastoid (SCM)

A

lateral surfcae of mastoid process of temporal bone and lateral half of superior nuchal line

30
Q

Insertion: Sternocleidomastoid (SCM)

A

Sternal head: anterior surface of manubrium of sternum

Clavicular Head: superior surface of medial third of clavicle

31
Q

Innervation: Sternocleidomastoid (SCM)

A

Spinal Accessory nerve (CN XI; motor) & C2 and C3 nerves (pain and proprioception)

32
Q

Action: Sternocleidomastoid (SCM)

A

Unilateral Contraction: tilts head to same side (lateral flexion) and rotates it so face is turned superiorly toward opposite (contralateral) side

Bilateral contraction: (1) extends neck at atlantooccipital joints, (2) flexes cervical vertebrae so that chin approaches manubrium, or (3) extends superior cervical certebrae while flexing inferior vertebrae so chin is thrust forward with head kept level

W/ cervical certebrae fixed, may elevate manubrium and medial ends of clavicles, assisting pumphandle action of deep respiration

33
Q

Origin: Diaphragm

A

Thoracic outlet

34
Q

Insertion: Diaphragm

A

central tendon of diaphragm

35
Q

Innervation: Diaphragm

A

phrenic nerve (C3- C5)

36
Q

Action: Diaphragm

A

compresses abdominal cavity by decreasing pressure in thoracic cage so air can go into lungs

37
Q

Origin: Anterior Scalene

A

Transverse processes of C3- C6

38
Q

Insertion: Anterior Scalene

A

1st rib

39
Q

Innervation: Anterior Scalene

A

cervical spinal nerves C4-C6

40
Q

Action: Anterior Scalene

A

Flex Head

41
Q

Origin: Middle Scalene

A

posterior tubercles of transverse processes of C5 - C7 vertebrae

42
Q

Insertion: Middle Scalene

A

superior surface of 1st rib; posterior to groove for subclavain artery

43
Q

Innervation: Middle Scalene

A

anterior rami of cervical spinal nerves

44
Q

Action: Middle Scalene

A

flexes neck laterally ; elevates 1st rib during foced inspiration

45
Q

Origin: Posterior Scalene

A

posterior tubercles of transverse processes of C5 - C7 vertebrae

46
Q

Insertion: Posterior Scalene

A

external border of 2nd rib

47
Q

Innervation: Posterior Scalene

A

anterior rami of cervical apinal nerves C7 & C8

48
Q

Action: Posterior Scalene

A

flexs neck laterally ;elevates 2nd rib during forced inspiration

49
Q

Origin: Levator Scapulae

A

posterior tubercles of transverse processes of C2 - C6 vertebrae

50
Q

Insertion: Levator Scapulae

A

superior part of medial border of scapula

51
Q

Innervation: Levator Scapulae

A

dorsal scapular nerve C5 and cervical spinal nerves C3 and C4

52
Q

Action: Levator Scapulae

A

downward rotation of scapula and tilits its glenoid cavity inferiorly by rotating scapula

Anatomy (25 decks)

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