What best describes a stroke?

What best describes a stroke?

• A. An interruption of cerebral blood flow due to ischaemia or haemorrhage resulting in neuronal death and deficits.
• B. A transient chest pain due to heart ischemia.
• C. A spinal cord injury from trauma.
• D. A seizure caused by abnormal brain electrical activity.

Answer: (A)

A stroke occurs when the brain’s blood supply is interrupted, either by a blockage (ischemic) or by a bleed (hemorrhagic). That disruption deprives brain cells of oxygen and nutrients, leading to cell death and neurological deficits that depend on which brain area is affected. This description captures both the cause (blood flow interruption) and the consequence (neuronal death with deficits), which is what defines a stroke. Other conditions described are not strokes: chest pain from heart ischemia points to heart problems like angina or heart attack, not brain tissue; spinal cord injury reflects trauma to the spine rather than the brain; a seizure involves abnormal brain electrical activity, not primarily a loss of brain blood flow causing tissue death.

A stroke occurs when the brain’s blood supply is interrupted, either by a blockage (ischemic) or by a bleed (hemorrhagic). That disruption deprives brain cells of oxygen and nutrients, leading to cell death and neurological deficits that depend on which brain area is affected. This description captures both the cause (blood flow interruption) and the consequence (neuronal death with deficits), which is what defines a stroke.

Other conditions described are not strokes: chest pain from heart ischemia points to heart problems like angina or heart attack, not brain tissue; spinal cord injury reflects trauma to the spine rather than the brain; a seizure involves abnormal brain electrical activity, not primarily a loss of brain blood flow causing tissue death.