The case of hm is a documented case of a patient whose speech skills and intelligence were unaffected by the removal of his hippocampus and parts of his temporal lobe but who could not form new long-term memories. which disorder did hm have?

The disorder that HM have is called anterograde amnesia, which is an inability to form or recall new long-term memories. This type of amnesia has a difficulty to learn new things but still have past memories like recognizing old faces, speak languages, sing and even remember the learnings from school before the surgery or accident.