5 Written questions
5 Matching questions
- Explain the internal acoustic meatus?
- What muscles are responsible for opening and closing the eye?
- What specific muscles of the eye are controlled by the abducent nerve (CNVI) and the trochlear nerve (CNIV)
- Explain how taste occurs.
- Explain the pathway of the accessory nerve (CNXI) and the branches.
- a CN 7 and CN 8 (Facial and vestibulacoclear) leave the skull.
- b Anterior 2/3 is the facial nerve (CNVII) through lingual nerve.
Posterior 1/3 is the glossopharngeal nerve (CN IX)
- c Opening- Levator palpebrae superioris
Closing- orbicularis oculi
- d Abducent- Lateral rectus
Trochlear- Superior oblique
- e 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.
5 Multiple choice questions
- 1. Nasopharynx
- Sensory- glossopharngeal
- Falx Cerebri: divides the cerebral lobes
Tentorium Cerebelli: Divides the cerebrum from the pons- except for the tentorial notch w/ allows communication
- 1. cribiform plate with holes for the olfactory nerve
2. Carotid canal, foramen ovale
3. Magnum foramen, internal accousti meatus, jugular foramen
- 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.
5 True/False questions
What muscles responsible for adduction and abduction of the eye? → Extorsion: Inferior oblique and rectus
Intorsion: Superior oblique and rectus
Explain the structures in the cavernous sinus. → 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).
Explain the function of the hypoglossal nerve (CNXII) → Supplies muscle of the tongue. Especially the genioglossus muscle going from the tip of the mandible to the posterior portion of the tongue.
Explain branching of the internal carotid artery. → Splits into:
1. opthalmic (eye supply)
2. Middle cerebral (lateral side of brain)
3. Anterior cerebral (anterior medial portion of the brain)
Anastomoses with the vertebral artery.
Explain the pathway of the facial nerve (CNVII) → Enters the internal acoustic meatus to hit the geniculate ganglion. Main branch goes out the stylomastoid foramen to supply face muscles, while it sends a chorda tympani branch to join lingual to go to submandibular/mental glands and carry taste. A smaller branch leaves geniculate ganglion called the greater petrosal nerve to hit the pterygopalatine ganglion and supply other glands.