What type of amnesia results from a brain injury and affects the ability to form new memories post-injury?

The type of amnesia that results from a brain injury and specifically affects the ability to form new memories after the injury is known as anterograde amnesia. This condition occurs when the brain’s ability to encode new information is impaired, preventing the individual from forming new long-term memories following the incident that caused the injury.

In contrast, retrograde amnesia refers to the loss of pre-existing memories prior to the injury, while global amnesia signifies a broader loss that can include various aspects of memory and may not be confined to post-injury memory formation. Autobiographical amnesia specifically pertains to a loss of personal history and experiences, rather than a general inability to form new memories. Thus, anterograde amnesia is the most accurate choice, as it directly describes the difficulty in creating memories after a brain injury.