Which of the following represents early clinical signs of increasing intracranial pressure?

• A. Headache, vomiting, decreased level of consciousness, and changes in pupil reactivity
• B. Severe hypertension with widened pulse pressure only
• C. Fever and neck stiffness
• D. Ataxia and coarse tremor

Answer: (A)

Rising intracranial pressure initially affects pain-sensitive coverings and brain function, so early signs reflect discomfort, rapid brain irritation, and beginning involvement of brainstem. A headache arises from stretching of meninges and increased pressure. Nausea and vomiting occur as the pressure affects the brain’s emetic center. As pressure climbs, mental status often deteriorates, with the patient becoming more irritable, confused, or drowsy—an early change in level of consciousness. Pupil reactivity may also become abnormal early on if pressure begins to impinge on the oculomotor nerve, leading to slowed or unequal pupils. Together, these symptoms—headache, vomiting, decreased level of consciousness, and altered pupil reaction—best represent the early signs of increasing intracranial pressure.

Hypertension with widened pulse pressure, if present, tends to appear later as a compensatory response (Cushing reaction) and is not an early sign. Fever with neck stiffness points to meningitis or other infection, not the initial ICP rise. Ataxia and coarse tremor suggest cerebellar or extrapyramidal issues, not early ICP changes.