Henry Molaison (patient H.M.) had severe epilepsy that was alleviated by bilateral temporal lobe surgery. Following this surgery, Molaison had
A) no memory deficits.
B) deficits in implicit but not explicit memories.
C) deficits in explicit but not implicit memories.
D) profound deficits in both implicit and explicit memories.

Question

Quizplus · Accepted Answer

Henry Molaison had deficits in explicit memories after his surgery. Explicit memories refer to conscious memories such as facts, events or personal experiences, whereas implicit memories are non-conscious memory, like skills or habits. Molaison could not form new explicit memories and struggled with recalling events that occurred before the surgery but had intact implicit memory.

Henry Molaison (Patient H