**Question:** Definition of TIA is, patient signs and symptoms resolve by

A. within 24 hours
B. within hours to days
C. within minutes to hours
D. within minutes to weeks

**Core Concept:** Transient Ischemic Attack (TIA) is a brief episode of neurological dysfunction due to focal brain, retinal, or spinal cord ischemia, often referred to as a "mini-stroke." It usually resolves within a short period, typically hours to days, but warrants immediate evaluation as it is a high-risk indicator for stroke.

**Why the Correct Answer is Right:** The correct answer is C. within minutes to hours because it accurately reflects the typical duration of TIA symptoms. TIA signs and symptoms typically resolve within minutes to hours, as the blood flow to the affected area is restored due to autoregulation or collateral circulation. If signs and symptoms persist beyond hours, they should be considered as stroke rather than TIA.

**Why Each Wrong Option is Incorrect:**

A. Within 24 hours: This option is too broad and does not accurately represent the typical duration of TIA symptoms. In some cases, symptoms may be present for a day or more, but this is less common.

B. Within hours to days: This option is too broad and does not accurately represent the rapid resolution of TIA symptoms. TIA symptoms usually resolve within minutes to hours.

D. Within minutes to weeks: This option is too broad and does not accurately represent the typical duration of TIA symptoms. TIA symptoms typically resolve within minutes to hours, not weeks.

**Clinical Pearl:** TIAs are crucial indicators of stroke risk, as they often precede a full-blown stroke by a few hours or days. Patients with a TIA should be evaluated promptly to identify underlying risk factors and prevent future strokes.