Deep Muscles of the neck and sub occipital triangle

Question 2

Splenius Capitis

Answer 2

attachments- from the ligamentum nuchae and lower cervical & upper thoracic spinous processes to the lateral third of the superior nuchal line & mastoid process

function- *extension & lateral flexion of the head

innervation- dorsal rami of cervical spinal n.

blood supply- vertebral, occipital, deep cervical & deep branch of transverse cervical a

Question 3

Splenius Cervicis

Answer 3

attachments- from spinous processes of upper thoracic vertebrae to transverse processes (posterior tubercles) of upper three cervical vertebrae

function- together extend neck, single side does ipsilateral rotation

innervation- dorsal rami of cervical spinal n.

blood supply- vertebral, occipital, deep cervical & deep branch of transverse cervical a.

Question 4

Longissimus Capitis

Answer 4

attachments- from the upper thoracic transverse processes to the posterior margin of the mastoid process

function- extension & ipsilateral rotation of the head

innervation- *dorsal rami of spinal n.

blood supply- vertebral, occipital, deep cervical & deep branch of transverse cervical a.

Question 5

Semispinalis Capitis

Answer 5

attachments- from upper thoracic & cervical transverse processes to the occipital bone between the inferior & superior nuchal lines

function- extension of the head

innervation- dorsal rami of cervical spinal n.

blood supply- vertebral, occipital, deep cervical & deep branch of transverse cervical a.

Question 6

Semispinalis Cervicis

Answer 6

attachments- from upper thoracic transverse processes to cervical spinous processes

function- extension of the neck

innervation- dorsal rami of cervical spinal n.

blood supply- vertebral, deep cervical & deep branch of transverse cervical a.

Question 7

Rectus Capitis Posterior Major

Answer 7

attachments- from the spinous process of the axis to the adjacent occipital bone

function- extension of the head

innervation- suboccipital n. (dorsal ramus C1)

blood supply- vertebral & occipital a

Question 8

Rectus Capitis posterior minor

Answer 8

attachments- from the posterior tubercle of the atlas to the adjacent occipital bone

function- extension of the head

innervation- suboccipital nerve (dorsal ramus C1)

blood supply- vertebral & occipital a.

Question 10

Obliquus capitis inferior (inferior oblique)

Answer 10

attachments- from the spinous process of the axis to the transverse process of the atlas

function- *ipsilateral rotation of the head

innervation- suboccipital n. (dorsal ramus C1)

blood supply- vertebral & occipital a.

Question 11

Obliquus capitis superior (superior oblique)

Answer 11

attachments- from the *transverse process of atlas to the occipital bone between superior & inferior nuchal lines

function- *posterolateral flexion of the head

innervation- suboccipital n. (dorsal ramus C1)

blood supply- vertebral & occipital a