Memory loss duration that characterizes moderate TBI is:

Memory loss duration that characterizes moderate TBI is:

• A. Memory loss >7 days
• B. Memory loss >24 hours but <7 days
• C. Memory loss <24 hours
• D. Memory loss >24 hours but <7 days

Answer: (D)

Post-traumatic amnesia duration is what helps distinguish moderate TBI from mild and severe. In moderate TBI, memory loss lasts more than 24 hours but less than 7 days. This window sits between mild PTA (less than 24 hours) and severe PTA (more than 7 days), reflecting a middle level of brain injury severity. Longer than 7 days would indicate severe TBI, while under 24 hours points to mild TBI. So the description of memory loss lasting >24 hours but <7 days correctly identifies moderate TBI.

Post-traumatic amnesia duration is what helps distinguish moderate TBI from mild and severe. In moderate TBI, memory loss lasts more than 24 hours but less than 7 days. This window sits between mild PTA (less than 24 hours) and severe PTA (more than 7 days), reflecting a middle level of brain injury severity. Longer than 7 days would indicate severe TBI, while under 24 hours points to mild TBI. So the description of memory loss lasting >24 hours but <7 days correctly identifies moderate TBI.