Suboccipital Triangle

Question 1

Muscles of the sub occipital triangle

Answer 1

• Obliquus capitis: superior/inferior
• Rectus capitis: superior/inferior

Question 2

Obliquus Capitis divisions, origin/insertion, action

Answer 2

• Inferior: Sp of C2 ►TP of C1, ipsilateral rotation of the head
• Superior: TP of C1 ► Occipital bone between nuchal lines, extends head/ipsilateral head bend

Question 3

Rectus Capitis: division, origin/insertion, action

Answer 3

• Major: SP of C2 ►Occipital bone below inferior nuchal line, Extends head/ipsilateral rotation
• Minor: Posterior tubercle of C1 ► Occipital bone below inferior nuchal line, Contributes to extension of the head

Question 4

Neural nerves to suboccipital triangle

Answer 4

• C1: Suboccipital nerve
• C2: Greater/Lesser occipital nerve

Question 5

Arteries that serve the suboccipital triangle

Answer 5

• Vertebral artery (through the transverse foramina and pierces the posterior atlanto-occipital membrane)
• Occipital artery from the external carotid artery