Deeper intrinsic muscle

Question 0

Splenius crevices

Answer 0

O: ligamentum nuchae of spinatus process of vertebrae C7-T6.

I: posterior tubercles of the transverse process of C1-C3 vertebrae.

N: posterior rami of spinal nerves.

A: extension, lateral flexon of the head and neck; ipsilateral rotation of the head.

Question 1

Splenius capitis

Answer 1

O: ligamentum nuchae o spinatus process of the vertebrae.

I: mastoid process o lateral end of the superior nuchal line.

N: posterior rami of spinal nerves.

A: extend, rotate o laterally flex the head o neek.

Question 2

Erector spine (sacrospinalis)

Answer 2

Iliocostails (lateral column)
Longissimus (intermediate column)
Spinalis (medial column)

O: sacrum, ilium, ribs, and spinous processes of lumbar and lower thoracic vertebrae.

I: ribs (iliocostalis); on the ribs, transverse processes, and mastoid process (skull).
(Longissimus); spinous process (Spinalis).

N: posterior rami of spinal nerves.

A: extend, rotate, and lateral flex the vertebral column and head.

Question 3

Transverse group

Answer 3

Semispimalis
Multifidus
Rotators

Question 4

Semispinalis

Answer 4

O: transverse processes of C4-T12

I: spinous processes of cervical and thoracic regions.

N: dorsal rami of spinal nerves.

A: Extends head, neck, and thorax and rotates them to opposite side.

Question 5

Multifudus

Answer 5

O: sacrum, ilium, transverse processes of T1-T12, and articular processes of C4-C7.

I: spinatous processes of vertebrae above, spanning two to four segments.

N: dorsal rami of each region.

A: stabilizes spine.

Question 6

Rotatores

Answer 6

O: transverse processes of; cervical, thoracic and lumbar regions.

I: lamina and transverse process of spine above, spaning two segments.

N: dorsal rami of spinal nerve.

A: stabilizes, extends, and rotates spine.

Question 7

Interspinales

Answer 7

(Cervical, thoracic, lumbar)

O: spinous process.

I: adjacent spinous process.

N: dorsal rami of spinal nerves.

A: aid in extension of vertebral column.

Question 8

Intertransversarii

Answer 8

(Cervical, thoracic, lumbar)

O: extended between adjacent transverse processes of vertebrae.

I: extended between adjacent transverse of vertebrae.

N: dorsal rami of spinal nerves.

A: assists in lateral flexon of vertebral column.

Question 9

Levatores costarum

Answer 9

O: tips of transverse processes of C7 and T1-T11 vertebrae.

I: pass interolaterally and insert on rib between tubercle and angle.

N: posterior rami of C8-T11 spinal nerves.

A: elevates ribs, assisting respiration; assist with lateral flexon of vertebral column.