← Anatomy Week 15 Test
5 Written Questions
5 Matching Questions
- Explain the flow of veins in the brain.
- What muscles responsible for looking up and down?
- What muscles responsible for adduction and abduction of the eye?
- Explain the internal acoustic meatus?
- What is the structure of duramatter.
- a Down posterior through superior saggital sinus of the falx cerebri. then through the transverse sinus of the tentorium cerebelli. then to the internal jugular vein.
- b 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.
- c Adduction: Medial, Superior, Inferior rectus
Abduction: Lateral, superior, inferior obliques
- d Up- Superior oblique and inferior rectus
Down- Inferior oblique and superior rectus
- e CN 7 and CN 8 (Facial and vestibulacoclear) leave the skull.
5 Multiple Choice Questions
Opthalmic- sensation to forehead and cornea
Maxillary- sensation to maxillary and upper teeth
Mandibular- sensation to madible and works chewing muscles
- Abducent- Lateral rectus
Trochlear- Superior oblique
- Sphenoid ridge- Anterior from medial
Petrous ridge- medial from posterior
- 1. cribiform plate with holes for the olfactory nerve
2. Carotid canal, foramen ovale
3. Magnum foramen, internal accousti meatus, jugular foramen
- glossopharngeal (CNIX) sends preganglionic parasymphatetics to the parotid gland.
5 True/False Questions
What muscles responsible for extortion and intorsion of the eye? → Extorsion: Inferior oblique and rectus
Intorsion: Superior oblique and rectus
Explain the pathway of the accessory nerve (CNXI) and the branches. → 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.
Explain the pathway of the facial nerve (CNVII) → Supplies muscle of the tongue. Especially the genioglossus muscle going from the tip of the mandible to the posterior portion of the tongue.
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.
Explain the peripheral pathway of the CNVIII- Vestibulocochlear nerve. → 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.