Posted by CB on October 08, 2011 at 15:43:18:
In Reply to: Temporal Fossa, Temporomandibular Joint, and Infratemporal Fossa posted by lae2 on October 07, 2011 at 15:25:23:
: 1. The lesser superficial petrosal nerve is part of a somatic plexus whereas the buccal nerve is part of an autonomic trunk. False- LSPN is pre-ganglionic parasympathetics. Autonomic.
: 2. The masseteric nerve passes through the mandibular notch. True.
: 3. The posterior superior alveolar nerve branches from the maxillary nerve within the pterygopalatine fossa and enters the infratemporal fossa through the pterygomaxillary fissure. True. The artery does NOT do this.
: 4. The buccal nerve passes the lateral aspect of the masseter muscle. False- this would be the buccal branch of the VII.
: 5. The chorda tympani joins onto the inferior alveolar nerve before distributing to the anterior 2/3 of the tongue. False. Try lingual.
: 6. Postganglionic fibers from the otic ganglion join onto; first the chorda tympani, and then the lingual nerve. False- auriculotemporal then facial according to lecture.
: 7. A lesion of the chorda tympani within the infratemporal fossa is expected to decrease sensitivity of touch to the posterior 1/3 of the tongue as well as decrease lacrimation. False. (Posterior 2/3 would be glossopharyngeal, lacrimation is GSPN).
: 8. A lesion of the lingual nerve within the floor of the mouth is expected to disrupt both taste and touch to the anterior 2/3 of the tongue. True- as it is carrying SVA and GSA at this location.
: 9. The mouth is apt to be stuck open if the condyle of the mandible slips forward to the articular tubercle. True- masseter acts as a depressor (jaw opener).
: 10. The left body of the mandible is one on the most commonly broken bones in males. True.
: 11. The inferior alveolar nerve contributes to the inferior dental plexus and then continues onto the face as the mental nerve. True- all GSA.
: 12. The nerve to the mylohyoid conveys GSE fibers to the mylohyoid muscle and SVE fibers to the anterior belly of the digastric. False- SVE to both.
: 13. The buccal nerve conveys SVE and GSA fibers to the buccinator muscle. False- only GSA.
: 14. The inferior alveolar nerve encircles the middle meningeal artery. False- auriculotemporal.
: 15. The posterior superior alveolar artery does not enter the pterygopalatine fossa despite that the nerve of the same name is within this fossa. True. The nerve is off V2.
: 16. The medial pterygoid muscle arises from the medial pterygoid plate whereas the lateral pterygoid muscle arises from the lateral pterygoid plate. False.
: 17. The hamulus is an inferior extension of the lateral pterygoid plate. False- medial plate- gives rise to pterygomandibular raphe. (lecture #1)
: 18. The maxillary artery passes from the infratemporal fossa to the pterygopalatine fossa whereas the maxillary nerve does not enter the infratemporal fossa. True- it divides within the PPF.
: 19. The lingula of the mandible is a site of attachment for the pterygomandibular raphe. False- attaches to mylohyoid line
: 20. The hamulus of the medial pterygoid plate is a site of attachment for the sphenomandibular ligament. False- arises from the spine of sphenoid.
: 21. The groove for the mylohyoid nerve proceeds inferior and anterior from the mandibular foramen. True
: 22. A lesion of the lesser superficial petrosal nerve is expected to cause ipsilateral salivatory deficits. True- parotid gland will lose parasympathetics.
: 23. A lesion of the lingual nerve at the foramen ovale is expected to disrupt touch (GSA) but not taste (SVA) to the anterior 2/3 of the tongue. True.
: 24. A lesion of the auriculotemporal nerve just medial to the neck of the mandible is expected to cause a salivatory deficit. True- it is carrying GVE to the parotid gland (post-ganglionics at this point)
: 25. The sympathetic root of the otic ganglion is derived from the external carotid plexus (middle meningeal plexus). True.