The patient H. M. experienced significant memory problems. H. M. symptoms suggested

A) he suffered damage to the occipital lobe.
B) that the memory loss was likely there prior to his operation, but the operation made it more noticeable.
C) he was suffering from retrograde amnesia.
D) he was suffering from anterograde amnesia.

Anterograde Amnesia

The inability to form new memories following the onset of an amnesia-causing event, while memories from before the event remain intact.

Retrograde Amnesia

A loss of memory access to events that occurred before a specific incident, often due to brain injury or psychological trauma.

Occipital Lobe

The region of the brain located at the back of the skull, primarily responsible for processing visual information.