Neuroanatomy Paper Part 2 - Answers

NEUROANATOMY PAPER 2 1. Cerebellar glomeruli formed by 1. Climbing fibers 2. Mossy fibers 3. Granular cell 4. Golgi cells 5. Purkinje cells a. 1,3,4 b. 2,3,4 c. 1,2,3 d. 2,4,5 Ans b 2,3,4 Cerebellar glomeruli formed by mossy fibers, granular cells and Golgi cells 2. In the given diagram cerebellar nuclei are marked. Identfy the phylogenetcally old nucleus in the given diagram a. b. c. d. Ans 4    1 2 3 4 1 – dentate nucleus – phylogenetcally new 2 – emboliform 3 – globose   4 – fastgial – medial most – phylogenetcally oldest 2 and 3 – nucleus interpositus 3. True/ false statement about marked structure a. b. c. d. e. Carries efferent from cerebellar cortex Only cell with excitatory property Present in inner granular layer Receives fibers directly from superior olivary nucleus Efferent s from this structure inhibits cerebellar nuclei Marked structure – Purkinje cells in cerebellum Ans      true – purkinje cells carries efferent from cerebellar cortex. ( deep cerebellar nuclei carries efferent from entre cerebellum c b – false. granule cell excitatory c – false - present in purkinje layer – middle layer d – false – receives fibers from inferior olivary nucleus – through climbing fibers e – true 4. Histology of given picture leads to all of the following disorder except a. b. c. d. Apraxia Rebound phenomenon Dysarthria Scanning speech Ans a apraxia Given image – cerebellum Signs of Cerebellar Dysfuncton           truncal ataxia, staggering gait, nystagmus hypotonia of limb muscles dysmetria, intentonal tremors, dysarthria, dysdiadochokinesia rebound phenomenon scanning speech. 5. Oculomotor cerebellum is formed by a. Flocculus b. Nodule c. Anterior lobe d. Pyramid e. Uvula And a, b Oculomotor cerebellum is also known as VESTIBULO(ARCHIOc cerebellum formed by focculus, lingula and nodule. Paleo cerebellum – spinocerebellum – formed by anterior lobe plus pyramid and uvula 6. Structures passing through marked structure a. b. c. d. e. Pontocerebellar Cuneocerebellar Anterior spinocerebellar Posterior spinocerebellar Vestbulocerebellar Ans a marked structure middle cerebellar peduncle Pontocerebellar fibers pass through middle cerebellar peduncle 7. Oculomotor nerve contains a. b. c. d. 1. 2. 3. 4. 5. 1 and 2 1 only 1, 2, 3 2 only GSE GVE SVE SSA SVA Ans a Oculomotor nerve contains GSE and GVE 8. All the following nucleus are present in medulla except a. Edinger westpaul nucleus b. Dorsal nucleus of vagus c. Nucleus tractus solitaries d. Nucleus ambiguous Ans a  Edinger westpaul nucleus situated in midbrain 9. The response optons for items 1 to 4 are the same. Select one answer for each item in the set a. Nucleus ambiguus b. Hypoglossal nucleus c. Edinger westpaul nucleus d. Nucleus tractus solitarius e. Mesencephalic nucleus of trigeminal f. Vestbular nucleus g. Dorsal nucleus of vagus 1. 2. 3. 4. parasympathetc nucleus in mid brain – c Edinger westpaul nucleus nucleus for propriocepton – e mesencephalic nucleus of trigeminal nucleus for gag refex – nucleus ambiguus GSE nucleus – hypoglossal nucleus 10. Identfy the structure passing through the marked canal a. b. c. d. Oculomotor nerve Facial nerve Abducent nerve Glossopharyngeal nerve Ans marked canal is dorello s canal – abducent nerve passing through this canal. 11. Not true about marked structure a. Related to foor of sphenoidal sinus b. It is formed by preganglionic parasympathetc and preganglionic sympathetc c. Connected to pterygopalatne ganglion d. Passes through pterygoid canal Answer b Marked structure vidian nerve formed by greater petrosal nerve ( preganglionic parasympathetc fibers c and deep petrosal nerve ( post ganglionic sympathetc fibers c Passes through pterygoid canal ( which is in foor of sphenoidal sinus c 12. A patent presents with loss of taste sensaton in anterior 2/3 of tongue but Schirmerss test is negatve. Where is the probable site of lesion
ac Stylomastoid foramen bc Geniculate ganglion cc Internal auditory canal/acoustc meatus dc Horizontal intratympanic path of facial nerve ans d    in stylomastoid foramen lesion – taste sensaton intact in geniculate ganglion lesion and internal auditory canal lesion – Schirmer s test positve so answer d – lesion in middle ear 13. Paralysis of 3rd ,4th ,6th nerves with involvement of ophthalmic division of 5th nerve, localizes the lesion to: a. Cavernous sinus and superior orbital fissure b. Apex of the orbit and cavernous sinus c. Cavernous sinus and inferior orbital fissure d. Cavernous sinus only Ans a. cavernous sinus and superior orbital fissure Based on the contents, cavernous sinus lesion and superior orbital fissure lesion may be associated with paralysis of 3rd, 4th, 5th (ophthalmic division) & 6th nerve. 14. Nerve supply of marked muscle a. b. c. d. Hypoglossal nerve Mandibular nerve Facial nerve Ansa cervicalis Ans a Marked muscle – geniohyoid – supplied by C1 fbers through hypoglossal nerve 15. Superfcial cut in the middle part of posterior triangle of neck, patent experience problem in a. Shrugging of shoulder b. Initaton of abducton of arm c. Adducton of arm d. Rotaton of face towards same side Ans a Spinal part of accessory nerve affected – trapezius and sternocleidomastoid paralyzed Shrugging of shoulder done by trapezius 16. Pharyngeal plexus not formed by a. Glossopharyngeal nerve b. Accessory nerve c. Vagus nerve d. Superior cervical ganglion Ans b 17. In the given secton of brain, which area is not circumventricular area a. b. c. d. A B C D Ans d A – OVLT B – POSTERIOR PITUITARY C – PINEAL GLAND D – FORNIX CIRCUM VENTRICULAR ORGANS – NO BLOOD BRAIN BARRIER  OVLT     Pineal gland Post pituitary Median eminence Area postrema 18. The foor of third ventricle is made up of a. Optc chiasma b. Tela choroidea c. Pineal gland d. Lamina terminalis Ans a Floor of 3rd ventricle Optc chiasma, infundibulum, pituitary, tuber cinereum, mamillary body. Posterior perforated substance and tegmentum of mid brain 19. Nucleus not matched correctly in the marked area a. A – Facial nucleus b. B – Hypoglossal nucleus c. C – vestbular nuclei d. D – vagal nucleus Ans a – facial nucleus A – contains abducent nucleus not facial 20. Which of the following were not feature of given brain imaging a. Tremors b. Dementa c. Gait d. Urinary incontnence Ans a The given brain image is normal pressure hydrocephalus Normal pressure hydrocephalus features  Dementa  Gait  Urinary incontnence 21. Identfy the tuber cinereum in the given diagram a. A b. B c. C d. D ANS B e. f. g. h. A – INFUNDIBULUM B – TUBER CINERIUM C – MAMILLARY BODY D – POSTERIOR PERFORATED SUBSTANCE