MRCS: Head and Neck/ENT/Endocrine +
CNS physiology Questions With Complete Solutions What is Cushing's triad? - Correct Answers ✅Hypertension
- bradycardia + respiratory depression
What are the branches of the ECA? - Correct Answers ✅Some Attendings Like Freaking Out Potential Medical Students Superior Thyroid Ascending pharyngeal Lingual Facial Occipital Post auricular Maxillary Superior temporal What is Trotter's triad for nasopharyngeal cancer? - Correct Answers ✅Unilateral conductive hearing loss Ipsilateral facial & ear pain Ipsilateral paralysis of soft palate Assoc. with EBV 1 / 4
MRCS: Head and Neck/ENT/Endocrine +
CNS physiology Questions With Complete Solutions What is a branchial arch? - Correct Answers ✅Support for the lateral walls of the cranial part of primitive pharynx What are the contents of the cavernous sinus? - Correct Answers ✅O TOM CAT Occulomotor nerve (III) Trochlear nerve (IV) Ophthalmic nerve (V1) Maxillary nerve (V2) Carotid artery Abducent nerve (VI) T OTOM=lateral wall components CA= components within sinus What are the parasympathetic functions of CNIII? - Correct Answers ✅Pupillary constriction/accomodation 2 / 4
MRCS: Head and Neck/ENT/Endocrine +
CNS physiology Questions With Complete Solutions What are the parasympathetic functions of the facial nerve? - Correct Answers ✅Lacrimal gland, submandibular and sublingual glands What are the parasympathetic functions of the glossopharyngeal nerve? - Correct Answers ✅Parotid What are the parasympathetic functions of the vagus nerve? - Correct Answers ✅Heart and viscera Describe the course of the cranial parasympathetic fibres - Correct Answers ✅Arise from nuclei within the CNS Synapse at the parasympathetic ganglia (otic, pterygopalatine, ciliary and submandibular) The journey to target tissues in CNV1, V2, V3 Describe the embryology of the tongue - Correct Answers ✅Tuberculum impar develops in the floor of the pharynx
Two lingual swellings arise from the first branchial arch and fuse to become the anterior 2/3rds of the tongue (CN V)
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MRCS: Head and Neck/ENT/Endocrine +
CNS physiology Questions With Complete Solutions Part of the second branchial arch contributes to the anterior 2/3rds of tongue (CN VII - chorda tympani)
The posterior 1/3 of tongue develops from the third branchial arch (CN IX)
The tongue musculature is derived from migrating occipital myotomes (CN XII) What is the primitive mouth called? - Correct Answers ✅Stomodaeum What are the derivatives of the first pharyngeal pouch? - Correct Answers ✅Eustachian tube, middle ear, mastoid antrum What are the derivatives of the second pharyngeal pouch? - Correct Answers ✅Tonsillar fossa (palatine tonsil) What are the derivatives of the third pharyngeal pouch? - Correct Answers ✅Thymus, inferior parathyroid What are the derivatives of the fourth pharyngeal pouch? - Correct Answers ✅Superior parathyroid, C-cells of thyroid
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