Summary

A transient_ischemic_attack is a brief episode of neurologic dysfunction from temporary_blood_flow_block. Symptoms have sudden_onset and resolve completely. Typical features include one-sided weakness or numbness, trouble speaking, vision loss, or dizziness. Duration is short_duration - minutes to under 24 hours, often less than an hour. There is no_permanent_deficit. A TIA is a stroke_warning_sign that reflects transient ischemia, not infarction. Cause is usually a small_clot or narrowed_artery.