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100+ Free FC Neurosurg(SA) Part I Practice Questions
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Key Facts: FC Neurosurg(SA) Part I Exam
100 Qs
Practice Bank Size
OpenExamPrep Practice Bank
R15 500
Exam Fee
CMSA Fee Schedule
50%
Passing Score
CMSA Regulations
CMSA
Exam Body
College of Neurosurgeons of SA
The CMSA FC Neurosurg(SA) Part I tests candidates on neuroanatomy, neurophysiology, neuropathology, neuropharmacology, and surgical basic sciences. This bank offers 100 high-yield, scientifically accurate practice questions mapped to the CMSA syllabus.
Sample FC Neurosurg(SA) Part I Practice Questions
Try these sample questions to test your FC Neurosurg(SA) Part I exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1A 45-year-old male presents with severe headache, neck stiffness, and progressive gait ataxia. MRI demonstrates cerebellar tonsillar herniation 8 mm below the level of the foramen magnum. Which of the following neuroanatomical structures forms the anterior boundary of the foramen magnum?
A.Basion of the occipital bone
B.Opisthion of the occipital bone
C.Posterior arch of the atlas
D.Tectal plate of the midbrain
Explanation: The basion is the midpoint of the anterior margin of the foramen magnum on the basilar part of the occipital bone. The opisthion forms the posterior midpoint. In cerebellar tonsillar herniation (Chiari malformation or mass effect), the tonsils descend past the basion-opisthion line into the cervical canal.
2A neurosurgical resident is performing a pterional craniotomy to clip an unruptured posterior communicating artery (PCoA) aneurysm. During dissecting, parasympathetic preganglionic fibers running within the oculomotor nerve (CN III) are identified. In which functional sub-nucleus of CN III do these parasympathetic fibers originate?
A.Edinger-Westphal nucleus
B.Central caudal nucleus
C.Main motor nucleus of CN III
D.Superior salivatory nucleus
Explanation: The preganglionic parasympathetic fibers that control pupillary constriction (sphincter pupillae) and accommodation (ciliary muscle) originate in the Edinger-Westphal nucleus. These fibers travel on the superficial dorsomedial aspect of CN III, making them vulnerable to compression by PCoA aneurysms, resulting in early pupillary dilation.
3During a transsphenoidal resection of a pituitary macroadenoma, the surgeon is cautious near the lateral wall of the sphenoid sinus. Which of the following structures passes directly through the body of the cavernous sinus alongside the internal carotid artery, rather than lying in its lateral wall?
A.Abducens nerve (CN VI)
B.Oculomotor nerve (CN III)
C.Trochlear nerve (CN IV)
D.Ophthalmic division of trigeminal nerve (CN V1)
Explanation: The abducens nerve (CN VI) and the internal carotid artery (ICA) traverse directly through the cavity of the cavernous sinus, surrounded by venous blood. In contrast, CN III, CN IV, CN V1, and CN V2 run embedded within the dural lateral wall of the cavernous sinus.
4Anterior communicating artery (ACoA) aneurysms frequently project in complex directions. Which arterial branch arises near the ACoA junction from the A1/A2 segment of the anterior cerebral artery to supply the anterior limb of the internal capsule and head of the caudate nucleus?
A.Recurrent artery of Heubner
B.Anterior choroidal artery
C.Posterior communicating artery
D.Ophthalmic artery
Explanation: The recurrent artery of Heubner (medial striate artery) originates from the distal A1 or proximal A2 segment of the anterior cerebral artery near the ACoA. It travels backward along the A1 segment to enter the anterior perforated substance, supplying the anterior limb of the internal capsule, head of the caudate nucleus, and anterior putamen.
5A patient suffers a hypertensive lacunar infarct involving the posterior limb of the internal capsule. Which arterial supply is predominantly responsible for this anatomical region?
A.Lenticulostriate arteries from the middle cerebral artery
B.Cortical branches of the anterior cerebral artery
C.Thalamoperforating arteries from the P1 segment
D.Superior cerebellar artery branches
Explanation: The lenticulostriate arteries, originating from the M1 segment of the middle cerebral artery, penetrate the anterior perforated substance to supply the superior part of the anterior limb, posterior limb, and body of the caudate/putamen/globus pallidus.
6A 52-year-old female presents with lancinating facial pain triggered by light touch to the cheek (trigeminal neuralgia). Pain and temperature sensation from the face travel downwards in the brainstem within which structure before synapsing?
A.Spinal trigeminal tract
B.Chief sensory nucleus of V
C.Mesencephalic nucleus of V
D.Medial lemniscus
Explanation: Nociceptive and thermal primary afferents of the trigeminal nerve descend as the spinal trigeminal tract through the pons and medulla down to the upper cervical cord (C2/C3) before synapsing in the spinal trigeminal nucleus.
7In cerebral ventricular system anatomy, cerebrospinal fluid passes from the fourth ventricle into the subarachnoid space via lateral outlets. What are these paired apertures called?
A.Foramina of Luschka
B.Foramen of Magendie
C.Foramen of Monro
D.Aqueduct of Sylvius
Explanation: The paired lateral apertures of the fourth ventricle located at the cerebellopontine angles are the foramina of Luschka. The single midline aperture is the foramen of Magendie.
8During a microvascular decompression for hemifacial spasm, the facial nerve (CN VII) is identified at the root exit zone. Which artery is most commonly found compressing CN VII at the brainstem?
A.Anterior inferior cerebellar artery (AICA)
B.Superior cerebellar artery (SCA)
C.Posterior inferior cerebellar artery (PICA)
D.Anterior spinal artery
Explanation: The anterior inferior cerebellar artery (AICA) or a loop of PICA/vertebral artery is the primary vessel implicated in hemifacial spasm by compressing the facial nerve root exit zone near the pontomedullary junction. SCA compresses CN V in trigeminal neuralgia.
9Which cranial nerve has the longest intracranial intradural course and exits the posterior (dorsal) surface of the brainstem before curving around the midbrain beneath the tentorial edge?
A.Trochlear nerve (CN IV)
B.Abducens nerve (CN VI)
C.Oculomotor nerve (CN III)
D.Trigeminal nerve (CN V)
Explanation: The trochlear nerve (CN IV) is unique: it is the only cranial nerve that emerges from the dorsal aspect of the brainstem, decussates completely within the superior medullary velum, and has the longest intradural course, making it vulnerable in head trauma and tentorial herniation.
10A patient presents with Brown-Séquard syndrome following a cervical stab wound. Which spinal cord tract decussates in the anterior white commissure 1 to 2 spinal segments above the level of entry?
A.Anterolateral (spinothalamic) tract
B.Lateral corticospinal tract
C.Fasciculus gracilis
D.Fasciculus cuneatus
Explanation: Pain and temperature fibers enter the dorsal horn, ascend 1-2 segments in Lissauer's tract, synapse, and then cross in the anterior white commissure to form the contralateral spinothalamic tract. Hemisection causes loss of pain/temperature on the contralateral side 1-2 segments below the lesion.
About the FC Neurosurg(SA) Part I Practice Questions
Verified exam format metadata for CMSA FC Neurosurg(SA) Part I — College of Neurosurgeons of South Africa is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.