CRANIAL BASE Flashcards
What foramina are found within the Sphenoid Bone?
- Superior orbital fissure
- Foramen Rotundum
- Foramen Ovale
- Foramen Spinosum
- Foramen Lacerum
Which foramen is an artifact of dried skull?
Foramen Lacerum
Where is the Superior orbital fissure located and what passes through it?
- Between the lesser and greater wings of the sphenoid bone
2. Cranial nerve 3-6 and Ophthalmic veins and sympathetic fibers
Location and Transmission of Foramen Rotundum?
- Posterior to the medial end of the superior orbital fissure.
- Maxillary nerve
Location and Transmission of the foramen ovale
- Posterolateral to foramen rotundum
2. Mandibular nerve and small accessory meningeal artery
Which foramen opens in the infratemporal fossa?
Foramen ovale
Location and transmission of Foramen Spinosum
- Posterolateral to F.Ovale
2. Transmits middle meningeal vessels and the meningeal branch of the mandibular nerve.
What lies posteriorly and laterally to F.Lacerum?
groove for greater petrosal nerve
Define the Clivus?
Centrally inclined part of occipital bone.
Foramina of the Posterior cranial fossa?
- Foramen magnum
- Jugular foramen
- hypoglossal nerve
- Internal acoustic meatus
What passes through the Foramen Magnum?
1.Vertebral arteries
2.dural veins
3.Spinal roots of CN XI
4Medulla and meninges
4.Anterior and posterior spinal arteries
What passes through the Jugular Foramen?
- CN 9-11
- Superior bulb of the internal jugular veins
- Inferior petrous and sigmoid sinuses
- Meningeal branches of the pharyngeal and occipital arteries
Transmission of the Hypoglossal Canal?
Hypoglossal nerve
Transmission through the internal acoustic meatus?
Vestibulocochlear and facial nerve
