Muscles of the Neck ( Module 4 ) Flashcards

1
Q

SCM - Innervation

A

Spinal Accessory Nerve (CN XI) C2,3

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2
Q

SCM - Origin

A

Sternal Head:
Top of the manubrium

Clavicular Head:
Medial 1/3 of the clavicle

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3
Q

SCM - Insertion

A

Mastoid process of the temporal bone
Lateral portion of the superior nuchal line of the occiput

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4
Q

SCM - Actions

A

Unilaterally:
LATERALLY FLEX the head and neck to the SAME side
ROTATE the head and neck to the OPPOSITE side

Bilaterally:
FLEX the neck
Assist to ELEVATE the ribcage during inhalation

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5
Q

Scalenes - Innervation

A

C3-8

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6
Q

Scalenes - Origin

A

ANTERIOR:
transverse process of C3-C6

MIDDLE:
transverse process of C2-C7

POSTERIOR:
transverse process of C6-C7

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7
Q

Scalenes - Insertion

A

ANTERIOR:
1st rib

MIDDLE:
1st rib

POSTERIOR:
2nd rib

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8
Q

Scalenes - Actions

A

Unilaterally:
LATERALLY FLEX the head and neck to the SAME side (all 3)
ROTATE the head and neck to the OPPOSITE side (all 3)

Bilaterally:
FLEX the head and neck (anterior only)
ELEVATE the ribs during inhalation (all 3)

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9
Q

SIN # to remember for scalenes

A

136 127 267

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10
Q

Levator Scapulae - Innervation

A

Cervical and dorsal scapular nerves

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11
Q

levator Scapulae - Origin

A

transverse process of C1 - C4

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12
Q

Levator Scapulae - Insertion

A

Medial border of the scapula between the superior angle and the superior portion of the spine of the scapula

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13
Q

Levator Scapula - Actions

A

Unilaterally:
ELEVATE the scapula
DOWNWARDLY ROTATE the scapula
LATERALLY FLEX the head and neck to the SAME side
ROTATE the head and neck to the SAME side

Bilaterally:
EXTEND the head and neck

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14
Q

Splenius Capitus - Innervation

A

Cervical nerve

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15
Q

Splenius capitus - Origin

A

Inferior 1/2 of the ligamentum nuchae
Spinous process of C7 - T4

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16
Q

Splenius Capitus - Insertion

A

Mastoid process
Lateral portion of the superior nuchal line

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17
Q

Splenius capitus - Actions

A

Unilaterally:
ROTATE the head and neck to the SAME side
LATERALLY FLEX the head and neck to the SAME side

Bilaterally:
EXTEND the head and neck

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18
Q

Splenius Cervicis - Innervation

A

Cervical Nerve

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19
Q

Splenius Cervicis - Origin

A

Spinous processes of T3 - T6

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20
Q

Splenius Cervicis - Insertion

A

Transverse processes of C1 - C3

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21
Q

Splenius Cervicis - Actions

A

Unilaterally:
ROTATE the head and neck to the SAME side
LATERALLY FLEX the head and neck to the SAME side

Bilaterally:
EXTEND the head and neck

22
Q

Pectoralis Minor - Innervation

A

Medial pectoral nerve, with fibers from a communicating branch of the lateral pectoral nerve

23
Q

Pectoralis Minor - Origin

A

Third, fourth, and fifth ribs

24
Q

Pectoralis Minor - Insertion

A

Medial surface of the coracoid process of the scapula

25
Q

Pectoralis Minor - Actions

A

DEPRESS the scapula (scapulothoracic joint)
ABDUCT/PROTRACT the scapula (scapulothoracic joint)
DOWNWARDLY ROTATE the scapula (scapulothoracic joint)

With the scapula fixed:
Assist to ELEVATE the thorax during forced inhalation

26
Q

Longus Colli - Innervation

A

C2-7

27
Q

Longus Colli - Origin

A

Bodies of C5 - T3
Transverse processes of C3 - C5

28
Q

Longus Colli - Insertion

A

Tubercle on anterior arch of the atlas
Bodies of the axis, C3 - C4
Transverse processes of C5 - C6

29
Q

Longus Colli - Actions

A

Unilaterally:
LATERALLY FLEX the head and neck to the SAME side
ROTATE the head and neck to the SAME side

Bilaterally:
FLEX the head and neck

30
Q

Suboccipitals - Name them

A

Rectus Capitis Posterior Major
Rectus Capitis Posterior Minor
Oblique Capitis Superior
Oblique Capitis Inferior

31
Q

Suboccipitals - Innervation

A

Suboccipital Nerve (all 4)

32
Q

RCP Major - Origin

A

Spinous process of the axis (C2)

33
Q

RCP Minor - Origin

A

Tubercle of the posterior arch of the atlas (C1)

34
Q

OCS - Origin

A

Transverse process of the atlas (C1)

35
Q

OCI - Origin

A

Spinous process of the axis (C2)

36
Q

RCP Major - Insertion

A

Inferior nuchal line of the occiput

37
Q

RCP Minor - Insertion

A

Inferior nuchal line of the occiput

38
Q

OCS - Insertion

A

between the nuchal lines of the occiput

39
Q

OCI - Insertion

A

Transverse process of the atlas (C1)

40
Q

Suboccipitals - Actions

A

RCP Major, RCP MInor, OCS:
ROCK & TILT the head back into extension

RCP Major, OCI:
ROTATE the head to the SAME side

OCS:
LATERALLY FLEX the head to the same side

41
Q

Which suboccipitals rock and tilt the head back into extension?

A

RCP Major
RCP Minor
OCS

42
Q

Which suboccipitals rotate the head and neck to the same side?

A

RCP Major
OCI

43
Q

Which suboccipitals laterally flex the head to the same side?

A

OCS

44
Q

Pectoralis Major - Actions

A

ADDUCT glenohumeral
MEDIALLY ROTATE glenohumeral
Assist to elevate thorax during forced inhalation

Upper fibers:
FLEX glenohumeral
HORIZONTALLY ADDUCT glenohumeral

Lower fibers:
EXTEND glenohumeral

45
Q

Pectoralis Major - Innervation

A

Medial and lateral pectoral nerves

46
Q

Pectoralis Major - Origin

A

Medial half of clavicle
Sternum
Cartilage of ribs 1-6

47
Q

Pectoralis major - insertion

A

Crest of greater tubercle of humerus

48
Q

OCI - actions

A

Rotate same side

49
Q

OCS - actions

A

Extend head
Laterally flex head

50
Q

RCP major - actions

A

Extend
Rotate same side

51
Q

RCP minor - actions

A

Extend