Final answer:
An abnormal sound auscultated in an artery leading to the brain is called a bruit, indicating possible vascular turbulence often due to narrowing or obstruction in the artery.
Step-by-step explanation:
The term for the auscultated discovery in an artery leading to the brain where an abnormal sound is heard is a bruit. A bruit is an abnormal sound that is usually a sign of vascular turbulence often caused by the narrowing or obstruction within an artery. The conditions described by the student including light-headedness, speech disturbance, and left-sided weakness could be indicative of a transient ischemic attack (TIA), especially since the symptoms lasted several hours. Unlike a TIA, a bruit is an audible finding that indicates a possible underlying vascular issue, such as atherosclerosis, but it is not itself a transient event like a TIA.