Central paresis, loss of proprioceptive sensation on one side & loss of exteroceptive sensation on the opposite form the following syndrome:

Correct Answer: D

Rationale: Brown-Sequard syndrome is the correct answer because it is characterized by ipsilateral motor paralysis and loss of proprioception, and contralateral loss of pain and temperature sensation. This syndrome results from damage to one side of the spinal cord, typically due to trauma or tumors.

Correct Answer: D

Rationale: Intracranial pressure (ICP) can be reduced by intravenous mannitol (an osmotic diuretic), placing the patient in a head-up position (to improve venous drainage), and hyperventilation (which reduces CO2 levels and causes cerebral vasoconstriction). All these methods are clinically used to manage elevated ICP.

Correct Answer: D

Rationale: Pupil size is largest in adolescence and decreases with age. Physiological anisocoria (unequal pupil size) is present in about 20% of the population. The latent period for the pupillary light reflex is typically 0.2 to 0.5 seconds.

Correct Answer: D

Rationale: Area V8, also known as the colour centre, is specifically involved in colour vision. V1, V2, and V3 are involved in early visual processing but not exclusively in colour vision.

Correct Answer: D

Rationale: Scotopic sensitivity peaks at 500 nm, photopic at 555 nm, and a yellow background shifts sensitivity to 440 nm for a 25-Hz stimulus. All statements are correct.