The spinal cord ends at the level of the:

Correct Answer: B

Rationale: The spinal cord ends at the conus medullaris, typically around L1-L2 (first lumbar vertebra) in adults, not extending to the coccyx, sacrum, or sciatic nerve.

Correct Answer: B

Rationale: Grey matter consists primarily of neuronal cell bodies (B), which contain nuclei and process information. Axons (A) and dendrites (D) contribute to white and grey matter, but cell bodies dominate grey matter. Neuralgia (C) is a condition, not a structure.

Correct Answer: C

Rationale: Cerebellar disorders typically cause hypotonia (not increased tone, ruling out A), reduced reflexes (not exaggerated, ruling out B), and a wide-based, ataxic gait (C) due to impaired coordination. Consciousness is not lost (D) unless secondary complications arise, as the cerebellum does not govern consciousness.

Correct Answer: D

Rationale: The premotor area (A, likely a typo), association motor areas (B, e.g., supplementary motor area), and frontal motor areas are motor regions. The temporal lobe (C) has some motor roles (e.g., speech), but the occipital lobe (D) is primarily visual, not motor. D is the exception.

Correct Answer: C

Rationale: Receptive aphasia (Wernicke’s) involves the posterior superior temporal gyrus (near Sylvian fissure, B partial), not frontal lobe (A, Broca’s). Patients don’t comprehend commands (C, correct), unlike motor aphasia (expression issue). Parietal infarction (D) may contribute, but temporal is key. C is correct.