Questioning the living/nonliving dichotomy: evidence from a patient with an unusual semantic dissociation.
In this article the authors describe a patient (J.P.) whose category-specific naming deficit eluded the classical dichotomies between living versus nonliving items or visual versus functional attributes. At age 22, he had herpes simplex encephalitis followed by a left temporal lobectomy. J.P. was tested on measures of visual perception, category naming, fluency, and name-picture matching. He showed a severe impairment naming and identifying fruits, vegetables, and musical instruments. His performance with animals and birds was spared inconsistently, meaning that even the preserved categories were, at some point, affected. J.P.'s unusual deficit supports the hypothesis that semantic knowledge is organized in the brain on the basis of object properties, which can cut across the living-nonliving categorical distinction.
Department of Brain and Cognitive Sciences and the Clinical Research Center (CRC), Massachusetts Institute of Technology (MIT), MA, USA. siri.simona@hsr.it
Simona
S
Siri
Elizabeth A
EA
Kensinger
Stefano F
SF
Cappa
Kristin L
KL
Hood
Suzanne
S
Corkin
D000328:Adult; D000849:Anomia / Q000209:etiology / Q000473:pathology / Q000523:psychology*; D003118:Color Perception / Q000502:physiology; D020803:Encephalitis, Herpes Simplex / Q000150:complications / Q000473:pathology / Q000523:psychology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D019635:Neurosurgical Procedures / Q000009:adverse effects; D012660:Semantics; D013702:Temporal Lobe / Q000473:pathology / Q000601:surgery; D014705:Verbal Behavior / Q000502:physiology; D014796:Visual Perception / Q000502:physiology