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Human Gross Anatomy > Back > Flashcards

Back Flashcards

0
Q

Splenius Insertion

A

Splenius Capitis: 1) Mastoid process of temporal bone
2) Lateral third of superior nuchal line
Splenius Cervicis: Tubercles of transverse process C1-C3 or C4

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1
Q

Splenius Origin

A

1) Nuchal Ligament

2) Spinous process C7-T3 or T4

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2
Q

Splenius Innervation

A

Posterior Rami of Spinal Nerves

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3
Q

Splenius Action

A

Alone: Laterally flex neck and rotate head to side of acting muscles
Together: Extend head and neck

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4
Q

Illicostalis
Longissimus
Spinalis

Origin

A

1) Posterior surface of sacrum
2) Sacro-iliac ligaments
3) Posterior part of iliac crest
4) Supraspinous ligament
5) Sacral and inferior lumbar spinous process

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5
Q

Iliacostalis Insertion

A

(Lumborum, thoracis, cervicis)

1) Lower ribs
2) Cervicle transverse processes

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6
Q

Longissimus Insertion

A

(Thoracis, cervisis, capitis)

1) Ribs between tubercles
2) Angles to transverse processes in thoracic and cervical regions
3) Mastoid Process

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7
Q

Spinalis Insertion

A

(Thoracis, cervicis, capitis)

1) Spinous processes in upper thoracic region and to cranium

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8
Q

Semispinalis (Thoracis, cervicis, capitis)

Origin

A

1) Transverse processes C4-T10

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9
Q

Semispinalis Insertion

A

1) Occipital bone

2) Spinous processes in upper thoracic and cervical regions, spanning 4-6 segments

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10
Q

Semispinalis Innervation

A

Posterior Rami of Spinal Nerves

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11
Q

Semispinalis Action

A

1) Extends head, thoracic, and cervical regions

2) Rotates these contralaterally

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12
Q

Multifidus Origin

A

1) Posterior surface of sacrum
2) Sacro-iliac ligaments
3) PSIS
4) Aponeurosis of erector spinae
5) Mammillary processes of lumbar vertebrae
6) Transverse processes T1-T3
7) Articular processes C4-C7

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13
Q

Multifidus Insertion

A

(Thickest in lumbar region)

1) Entire length of of spinous processes of vertebrae, located 2-4 segments superior to origin

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14
Q

Multifidus Innervation

A

Posterior Rami of Spinal Nerves

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15
Q

Multifidus Action

A

1) Stabilizes vertebrae during local movements

2) Unilateral contraction rotates to contralateral side

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16
Q

Rotatores (brevis and longus) Origin

A

1) Transverse processes of vertebrae - best developed in thoracic region

17
Q

Rotatores Insertion

A

1) Attach to junction of lamina

2) Transverse or spinous process of vertebrae immediately (brevis) or 2 segments (longus) superior to vertebra of origin

18
Q

Rotatores Innervation

A

Posterior Rami of Spinal Nerves

19
Q

Rotatores Action

A

1) May function as organs of proprioception
2) Possibly stabilize vertebrae
3) Assist with local extension and rotatory movements of vertebral column

20
Q

Obliquus capitis superior Origin

A

1) Transverse process of C1

21
Q

Obliquus Capitis Superior Insertion

A

1) Occipital bone between superior and inferior nuchal lines

22
Q

Obliquus Capitis Superior Innervation

A

Posterior Rami of C1 (Suboccipital nerve)

23
Q

Obliquus Capitis Superior Action

A

Postural muscle act on head directly

24
Q

Obliquus Capitis Inferior Origin

A

1) Spinous process of C2

25
Q

Obliquus Capitis Inferior Insertion

A

1) Transverse process of C1

26
Q

Obliquus Capitis Inferior Innervation

A

Posterior Rami of C1 (Suboccipital nerve)

27
Q

Obliquus capitis inferior action

A

1) postural muscle act on head indirectly

28
Q

Rectus Capitis Posterior Major Origin

A

1) Spinous process of C2

29
Q

Rectus Capitis Posterior Major Insertion

A

1) Lateral part of the inferior nuchal line

30
Q

Rectus Capitis Inferior Innervation

A

Posterior Rami of C1 (Suboccipital Nerve)

31
Q

Rectus Capitis Posterior Major Action

A

Postural Muscle act on head directly

32
Q

Rectus Capitis Posterior Minor Origin

A

1) Posterior tubercle on the posterior arch of C1

33
Q

Rectus Capitis Posterior Minor Insertion

A

1) Medial third of inferior nuchal line

34
Q

Rectus Capitis Posterior Minor Innervation

A

Posterior Rami of C1 (Suboccipital Nerve)

35
Q

Rectus Capitis Posterior Minor Action

A

1) Postural muscle act on head directly

36
Q

Sternocleidomastoid Origin

A

1) Lateral surface of mastoid process

2) Lateral half of superior nuchal line

37
Q

Sternocleidomastoid Insertion

A

Sternal Head: 1) Anterior surface of manubrium

Clavicular Head: 1) Superior surface of medial third of clavicle

38
Q

Sternocleidomastoid Innervation

A

Spinal Accessory Nerve (CN 11), C2, C3

39
Q

Sternocleidomastoid Action

A

Unilaterally contraction: Ipsilateral flexion and contralateral rotation
Biaterally: 1) Extends neck at atlanto-occipital joints
2) Flexes cervical vertebrae so that chin approaches manubrium
3) Extends superior cervical vertebrae while flexing inferior vertebrae so chin is thrust forward with head kept level

Human Gross Anatomy (10 decks)

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