title: Impaired visual and odor recognition memory span in patients with hippocampal lesions.
abstract: In a recent study, rats with hippocampal lesions performed as well as did unoperated rats on an olfactory memory span task, performing approximately 80% correct even when the span length reached 24 odors. This finding seems potentially at odds with demonstrations that memory-impaired patients typically fail tasks in which large amounts of information must be retained. Accordingly, we have assessed recognition memory span performance for line drawings of objects, designs, and odors in amnesic patients with damage thought to be limited to the hippocampal region. The patients were impaired on all three tasks. We consider possible explanations for the difference between the findings for humans and rats, including the fact that olfactory function is particularly well-developed in rodents.
authors.affiliation: Veterans Affairs Healthcare System, San Diego, California 92161, USA.
authors.forename: Daniel A
authors.initials: DA
authors.lastname: Levy
authors.forename: Joseph R
authors.initials: JR
authors.lastname: Manns
authors.forename: Ramona O
authors.initials: RO
authors.lastname: Hopkins
authors.forename: Jeffrey J
authors.initials: JJ
authors.lastname: Gold
authors.forename: Nicola J
authors.initials: NJ
authors.lastname: Broadbent
authors.forename: Larry R
authors.initials: LR
authors.lastname: Squire
mesh_terms: D000328:Adult; D005260:Female; D006624:Hippocampus / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008568:Memory; D008569:Memory Disorders / Q000503:physiopathology*; D008875:Middle Aged; D009812:Odorants; D010775:Photic Stimulation; D021641:Recognition, Psychology; D012903:Smell; D014796:Visual Perception