Which term describes a brief episode of neurologic dysfunction due to temporary disruption of cerebral blood flow?

• A. Seizures
• B. Dementia
• C. Transient Ischemic Attacks (TIAs)
• D. Epilepsy

Answer: (C)

A brief episode of neurologic dysfunction caused by temporary disruption of blood flow to the brain is known as a transient ischemic attack. This vascular event happens when a clot or plaque briefly blocks a brain vessel, producing symptoms that come on suddenly and resolve as blood flow returns, usually within minutes to a few hours, leaving no lasting damage. This is a key distinction from seizures, which arise from abnormal electrical activity in the brain and often involve convulsions or altered consciousness; dementia, which is a chronic, progressive decline in cognitive function; and epilepsy, which is characterized by recurrent seizures due to brain hyperexcitability. TIAs serve as important warning signs for potential strokes and require urgent evaluation to prevent a full stroke.