Muscles of the deep back and neck Flashcards Preview

Gross Anatomy - ML > Muscles of the deep back and neck > Flashcards

Flashcards in Muscles of the deep back and neck Deck (14)
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1
Q

Erector spinae actions

A

Bilaterally: extend spine
Unilaterally: extend and laterally flex spine

2
Q

Longissimus capitis and spinalis capitis action

A

Bilateral: extend skull on cervical vertebrae
Unilateral: extend skull while rotating to ipsilateral side

3
Q

Splenius capitis and cervicis action

A

Bilateral: extend head and neck

Unilateral : extend and laterally flex neck and head to ipsilateral side

4
Q

Actions of semispinalis thoracis and cervicis muscles

A

Bilaterally: extend thoracic and cervical spine
Unilaterally: extend and rotate the thoracic vertebrae toward opposite side, and extend and laterally flex cervical vertebrae

5
Q

Action of semispinalis capitis

A

Bilaterally: extend skull on neck
Unilaterally: extend skull and rotate face to contralateral side

6
Q

Multifidus action

A

Bilaterally: extend the lumbar and thoracic spine. Involved in stabilizing the spine

7
Q

Rotatores action

A

Rotate superior vertebra to opposite side. Especially active in thoracic region of vertebral column

8
Q

Interspinales action

A

Extend spine

9
Q

Intertransversarii action

A

Bilaterally: extend vertebral column

Unilateral action is to flex the spine

10
Q

Rectus capitis posterior major action

A

Extend head, some rotation

11
Q

Sub occipital muscle innervation

A

Dorsal rami of C1 (sub occipital nerve)

12
Q

Rectus capitis posterior minor action

A

Extend the head

13
Q

Obliquus capitis inferior action

A

Turn head to ipsilateral side

14
Q

Obliquus capitis superior action

A

Tips head back to same side