What is the neurological condition identified by a sudden, temporary loss of consciousness due to insufficient blood flow to the brain?

The condition described in the question, characterized by a sudden, temporary loss of consciousness due to insufficient blood flow to the brain, is syncope. This phenomenon occurs as a result of decreased cerebral perfusion, often triggered by factors such as dehydration, hypotension, or vasovagal responses. During an episode of syncope, the individual loses consciousness briefly but typically recovers quickly after regaining normal blood flow to the brain.

In contrast, reversible ischemic neurological deficit (RIND) refers to a transient stroke-like episode that lasts longer than 24 hours but resolves completely, while a transient ischemic attack (TIA) is a temporary period of symptoms similar to those of a stroke that typically lasts less than 24 hours but still presents with potential risk for a future stroke. A concussion involves a traumatic brain injury that affects brain function, leading to temporary cognitive disturbances rather than a direct loss of consciousness due to decreased blood flow.