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.
- What is the role of the geniculate ganglion?
- Explain the specific branches of the mandibular nerve.
- What divides the anterior, medial, and posterior cranial fossa?
- Explain the function of the hypoglossal nerve (CNXII)
- a Sphenoid ridge- Anterior from medial
Petrous ridge- medial from posterior
- b Supplies muscle of the tongue. Especially the genioglossus muscle going from the tip of the mandible to the posterior portion of the tongue.
- 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 It is the sensory ganglion for taste from the facial nerve (through the lingual nerve).
- e Has the lingual (sensation to tonuge) and the mental (sensation to mandible) components.
5 Multiple choice questions
- Abducent- Lateral rectus
Trochlear- Superior oblique
- 1. cribiform plate with holes for the olfactory nerve
2. Carotid canal, foramen ovale
3. Magnum foramen, internal accousti meatus, jugular foramen
- Up- Superior oblique and inferior rectus
Down- Inferior oblique and superior rectus
- Behind maxiallary sinus. Postganglionic sympathics from greater petrosal nerve (facial) for parasympth. of nasal/lacramal/palatine glands. also branches of the trigeminal
- 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.
5 True/False questions
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.
What are the different duramatter in the brain? → Falx Cerebri: divides the cerebral lobes
Tentorium Cerebelli: Divides the cerebrum from the pons- except for the tentorial notch w/ allows communication
What are the functions of the trigeminal nerve (CNV) → Sensory/motor
Opthalmic- sensation to forehead and cornea
Maxillary- sensation to maxillary and upper teeth
Mandibular- sensation to madible and works chewing muscles
What muscles are responsible for opening and closing the eye? → Opening- Levator palpebrae superioris
Closing- orbicularis oculi
Explain the peripheral pathway of the CNVII- oculomotor nerve. → Receptors in the nose travel to the cell bodies in the olfactory bulb that sits on the cribiform plate of the ethmoid bone. Here axons continue to the brain.