5 Written questions
5 Matching questions
- What divides the anterior, medial, and posterior cranial fossa?
- Explain the function of the submandibular ganglion.
- What are the divisions of the pharynx.
- Explain the pathway of the facial nerve (CNVII)
- Explain the peripheral pathway of the CNVIII- Vestibulocochlear nerve.
- a 1. Cochlear (for hearing) in the spiral part of the middle ear goes to the spiral ganglion (cell bodies)
2. Vestibular (balance) in the vestibular appartus goes to the vestibular ganglion (cell bodies)
Axons from both of these converge to leave middle ear to the brain.
- b Chorda typani (facial) post ganglionic parasympathtics to the submandibular gland and the submental gland.
- c 1. Nasopharynx
- d Sphenoid ridge- Anterior from medial
Petrous ridge- medial from posterior
- e 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.
5 Multiple choice questions
- Up- Superior oblique and inferior rectus
Down- Inferior oblique and superior rectus
- 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).
- 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.
- 1. Supraorbital notch
2. Infraorbital foramen
3. Mental foramen
- Two layers:
1. meningeal layer (to tissue)
2. periosteal layer (to the skull)
The area in between the two is sinus where vein can travel.
5 True/False questions
Explain how taste occurs. → 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 → Sensory/motor
Opthalmic- sensation to forehead and cornea
Maxillary- sensation to maxillary and upper teeth
Mandibular- sensation to madible and works chewing muscles
Explain the internal acoustic meatus? → CN 7 and CN 8 (Facial and vestibulacoclear) leave the skull.
What muscles responsible for adduction and abduction of the eye? → Extorsion: Inferior oblique and rectus
Intorsion: Superior oblique and rectus
What is the role of the geniculate ganglion? → glossopharngeal (CNIX) sends preganglionic parasymphatetics to the parotid gland.