Final answer:
The Glasgow Coma Scale (GCS) is the tool described for assessing the level of consciousness after brain injuries like strokes and TBIs, with lower scores indicating more severe damage.
Step-by-step explanation:
The measurement tool being described is the Glasgow Coma Scale (GCS), which is a clinical scale used to measure a person's level of consciousness after a brain injury, such as stroke, trauma, or traumatic brain injuries (TBIs). Levels on the GCS range from 3 to 15, with lower scores indicating more severe brain injuries and a deeper level of unconsciousness. This tool is essential in emergency situations, as a rapid assessment of neurological function is critical for making informed treatment decisions. The FAST mnemonic is another tool used to help recognize the signs of a stroke quickly and efficiently.