Suboccipital and deep neck muscles Flashcards
suboccipital region
superior part of back of neck
inferior to occipital region of head, including posterior aspects of C1 and C2 vertebrae
suboccipital triangle area
lies deep to trapezius and semispinalis capitis muscle
four muscles in suboccipital region
rectus capitis posterior major and minor
obliquus capitis superior and inferior
innervation of suboccipital tegion
suboccipital nerve: posyerior ramus of C1
rectus capitis posterior major origin
spinous process of C2 vertebra
rectus capitis posterior major insertion
lateral part of the inferior nuchal line of occipital bone
rectus capitis posterior minor origin
posterior tubercle on the posterior arch of C1 vertebra
rectus capitis posterior minor insertion
medial third of inferior nuchal line
obliquus capitis inferior origin
spinous process of C2 verterba
obliquus capitis inferior insertion
transverse process of C1 vertebra
only muscle with capitis that doesnt attach to cranium
obliquus capitis inferior
obliquus capitis superior origin
transverse process of C1
obliquus capitis superior insertion
occipital bone between superior and inferior nuchal lines
action of muscles of suboccipital region
postural
act on head
boundaries and contents of suboccipital triangke
superomedially: rectus capitis posterior major
superolaterally: obliquus capitis superior
inferolaterally: obliquus capitis inferior
floor, posterior atlanto-occipital membrane and posterior arch of C1
Roof: semispinalis capitis
contents: vertebral artery and suboccipital nerve