Deep muscles of the neck and suboccipital triangle Flashcards
Splenius capitis (G. splenion, bandage)
Attachments: from the ligamentum nuchae & lower cervical & upper thoracic spinous processes to the lateral third of the superior nuchal line
Function: extension & lateral flexion of the head
Innervation: dorsal rami of cervical spinal a.
Blood supply: vertebral, occipital, deep cervical & deep branch of transverse cervical a.
Splenius cervicis
Attachments: from spinous processes of upper thoracic vertebrae to transverse processes of upper three cervical vertebrae
Function: together extend neck, single side does ipsilateral rotation
Innervation: dorsal rami of cervical spinal n.
Longissimus capitis
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.
Semispinalis capitis
Attachments: from upper thoracic & cervical transverse processes to the occipital bone between the inferior & superior nuchal lines
Fuction: extension of the head
Innervation: dorsal rami of cervical spinal n.
Blood supply: vertebral, occipital, deep cervical & deep branch of transverse cervical a.
Semispinalis cervicis
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.
Rectus capitis posterior major
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 & occiptal a.
Rectus capitis posterior minor
Attachments: from the posterior tubercle of the atlas to the adjacent occipital bone
Function: extension of the head
Innervation: suboccipital n. (dorsal ramus C1)
Blood supply: vertebral & occipital a.
Obliquus capitis inferior
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.
Obliquus capitis superior
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.
