Ventricular System and Subarachnoid Space is part of the Neuroanatomy section of Anatomy. Practise 13 exam-style MCQs for NEET PG, FMGE, INI-CET and NEET SS, each with the correct answer and a detailed explanation.
About Ventricular System and Subarachnoid Space MCQs
Ventricular System and Subarachnoid Space MCQs explore Dandy–Walker syndrome from blocked fourth ventricle apertures, CSF sampling by lumbar puncture, the floor of the third ventricle and choroid plexus supply — high-yield NEET PG revision.
Sample Ventricular System and Subarachnoid Space MCQs with answers
Sample MCQ #1
A neonate was shifted to the NICU due to respiratory distress and periodic seizures. CT scan revealed cystic dilatation of the fourth ventricle due to blockage of the median and lateral apertures. What is the likely diagnosis?
ASyringomyelia
BRachischisis
CDandy-Walker syndrome
DArnold-Chiari malformation
Show Answer & Explanation ▾
✓ Correct Answer: C. Dandy-Walker syndrome
Blockage of the medial and the lateral apertures of the 4th ventricle is seen in Dandy-Walker syndrome (DWS). DWS is congenital hydrocephalus associated with atresia of the median aperture (foramen of Magendie) and lateral aperture (foramen of Luschka) of the 4th ventricle. This causes enlargement of the 4th ventricle and hydrocephalus. Reference - Textbook of Langman's, 12th Edition, Central Nervous System Embryology Page number - 288
Sample MCQ #2
Which of the following is incorrect about venous drainage of the brain?
AIt is devoid of muscular tissue
BIt does not follows arterial pattern
CIt does not have valves
DIt runs mainly in subdural space
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✓ Correct Answer: D. It runs mainly in subdural space
Explanation: Cerebral veins are thin walled, valveless and do not follow arteries. They run mainly in the subarachnoid space, not the subdural space, hence option D is incorrect.
Sample MCQ #3
A patient is suspected of having bacterial meningitis. A lumbar puncture is performed to remove cerebrospinal fluid (CSF) for analysis. The fluid would be removed from the:
AEpidural space at the level of L3
BIntervertebral foramen at the level of L2
CSpinal canal at level of L 3
DSubarachnoid space at the level of L4
Show Answer & Explanation ▾
✓ Correct Answer: D. Subarachnoid space at the level of L4
There are 2 issues to think about here. First, from what compartment is the CSF removed? Second, at what level should the needle be inserted in a spinal tap? CSF is removed from the subarachnoid space. The epidural space contains epidural fat, and the subdural space is a potential space only. Also, remember that a lumbar puncture should be performed at the level of L4. Because the spinal cord ends at the bottom of L1 or the top of L2, L4 is a safe level for inserting a needle. Reference: Textbook of Gray's Anatomy for students, 3rd Edition, Back, Page number - 104
Sample MCQ #4
A patient underwent third ventriculostomy for treatment of hydrocephalus. During the procedure, the doctor accidentally perforated the floor of the third ventricle. Which of the following structures is not likely to be injured?
AInfundibulum
BOculomotor nerve
CMamillary body
DOptic chiasma
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✓ Correct Answer: B. Oculomotor nerve
The structures related to the floor of the third ventricle (from anterior to posterior) include: Optic chiasma Infundibulum Mamillary bodies Posterior perforating substance Tegmentum of the midbrain. Reference : Textbook of Gray's Anatomy for students, 3rd Edition, Head and neck, Page number - 877
Sample MCQ #5
Which structure is present on the floor of the fourth ventricle in the medullary cross-section at the level of olives?
ADorsal nucleus of vagus
BTrapezoid body
CSuperior vestibular nucleus
DNucleus gracilis
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✓ Correct Answer: A. Dorsal nucleus of vagus
The dorsal nucleus of vagus is present through the floor of the fourth ventricle seen in a cross-section of the medulla at the level of olives. Reference : Textbook of Gray's Anatomy for students, 3rd Edition, Head and Neck, Page number - 879
Sample MCQ #6
Choroid plexus of lateral ventricle is derived from which of the following arteries?
AInternal carotid artery and posterior cerebral artery
BInternal carotid artery and anterior cerebral artery
CMiddle cerebral artery and posterior cerebral artery
DMiddle cerebral artery and anterior cerebral artery
Show Answer & Explanation ▾
✓ Correct Answer: A. Internal carotid artery and posterior cerebral artery
Explanation: The choroid plexus of the lateral ventricle is supplied by two main arteries: the anterior choroidal artery (branch of the internal carotid artery ) and the posterior choroidal artery (branch of the posterior cerebral artery ). These arteries enter through the choroid fissure, where the pia mater invaginates into the ventricle to form vascular tufts. Hence, its blood supply comes from ICA and the PCA and not from ACA or MCA branches.
What you can practise in Ventricular System and Subarachnoid Space
13 Ventricular System and Subarachnoid Space MCQs on Ventricular System, Subarachnoid Space, Neuroanatomy — each with detailed explanations
Previous-year question practice across NEET PG, FMGE, INI-CET and NEET SS
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What do Ventricular System and Subarachnoid Space MCQs cover?
Ventricular System and Subarachnoid Space MCQs explore Dandy–Walker syndrome from blocked fourth ventricle apertures, CSF sampling by lumbar puncture, the floor of the third ventricle and choroid plexus supply — high-yield NEET PG revision.
How many Ventricular System and Subarachnoid Space questions are there, and which exams do they cover?
MedLadder includes 13 curated MCQs for Ventricular System and Subarachnoid Space under Anatomy (Neuroanatomy), covering NEET PG, FMGE, INI-CET and NEET SS preparation.
