5 Written Questions
5 Matching Questions
- What is the difference between the optic nerve and the optic track? How does crossing work in the nerves of the optic nerve.
- Explain where the trigeminal nerve exits externally.
- Explain the structures in the cavernous sinus.
- What muscles are responsible for opening and closing the eye?
- What muscles responsible for extortion and intorsion of the eye?
- a Opening- Levator palpebrae superioris
Closing- orbicularis oculi
- b Against Medial wall sits the carotid siphon and the sphenoid fossa.
CN III, IV, VI corse through to exit out the superior orbital fissure (between the wings of the sphenoid).
Trigeminal splits to exit (opthalmic out the superior orbital fissure, maxillary out the foramen rotunda, and mandibular out the foramen ovale).
- c Optic Nerve: eye to chiasm
Optic Tract: chiasm to brain
Nasal portion nerves cross in chiasm while the lateral portions do not. Thus left field processed by right side of the brain and vice-versa.
- d Extorsion: Inferior oblique and rectus
Intorsion: Superior oblique and rectus
- e 1. Supraorbital notch
2. Infraorbital foramen
3. Mental foramen
5 Multiple Choice Questions
- Sphenoid ridge- Anterior from medial
Petrous ridge- medial from posterior
- Abducent- Lateral rectus
Trochlear- Superior oblique
- Falx Cerebri: divides the cerebral lobes
Tentorium Cerebelli: Divides the cerebrum from the pons- except for the tentorial notch w/ allows communication
- Supplies muscle of the tongue. Especially the genioglossus muscle going from the tip of the mandible to the posterior portion of the tongue.
- Up- Superior oblique and inferior rectus
Down- Inferior oblique and superior rectus
5 True/False Questions
Explain the pathway of the accessory nerve (CNXI) and the branches. → Has a cranial and spinal root. Spinal root comes to join the cranial root in the skull and then they leave the skull. Cranial root becomes apart of the vagus nerve and the spinal root innervates the traps and sternocleidomastoid. PAIN GOES TO CERVICAL NOT CRANIAL ROOTS.
Where is the hypogloassal canal? → Where the jugular vein leaves as well as CN 9, 10, 11. (Vagus, glosspharngeal, accessory).
What are the structures of the:
1. anterior base of the skull
2. medial base of the skull
3. posterior base of the skull → 1. cribiform plate with holes for the olfactory nerve
2. Carotid canal, foramen ovale
3. Magnum foramen, internal accousti meatus, jugular foramen
Explain the specific branches of the mandibular nerve. → 1. Cervical
Explain the flow of veins in the brain. → Anterior 2/3 is the facial nerve (CNVII) through lingual nerve.
Posterior 1/3 is the glossopharngeal nerve (CN IX)