Disinhibited behavior after a right temporal lobe infarction.
|
Accession number;99A0178051
|
| Title;Disinhibited behavior after a right temporal lobe infarction. |
| Author;
MANO KEIKO
(Hyogo Inst. Aging Brain and Cognitibe Disorders)
IMAMURA TOORU
(Hyogo Inst. Aging Brain and Cognitibe Disorders)
FUJIMORI MISATO
(Hyogo Inst. Aging Brain and Cognitibe Disorders)
ISHII KAZUNARI
(Hyogo Inst. Aging Brain and Cognitibe Disorders)
MORI ETSURO
(Hyogo Inst. Aging Brain and Cognitibe Disorders)
|
Journal Title;Japanese Journal of Neuropsychology
|
Journal Code:X0143A
|
ISSN:0911-1085
|
|
VOL.14;NO.4;PAGE.233-241(1998)
|
| Figure&Table&Reference;FIG.4, TBL.2, REF.26 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;We described a 77-year-old right-handed female who exhibited long-standing behavioral changes characterized by disinhibited and simplistic behavior, and loss of social awareness after a right temporal lobe infarction. Neurological abnormalities included positive grasp and palmomental reflexes on both sides, positive snout reflex, and right extensor planter response. The patient achieved 26 on the Mini-Mental State Examination. No amnesia, aphasia, apraxia or agnosia were noted except for a minimal evidence of left unilateral spatial neglect. On the other hand, performance on frontal lobe tasks was apparently impaired. Word production was decreased on the word fluency tasks, and a difficulty in mental shift was noted on sorting tasks. Utilization behavior was occasionally observed. She neglected given instructions and broke the rules in neuropsychological testings. Her disinhibited behaviors were also apparent in a 6-week hospital stay. Cranial magnetic resonance (MR) images revealed an old infarction in the right superior temporal and inferior parietal region. No ischemic changes or atrophy was observed in the frontal lobes. A positron emission tomography (PET) study showed a decreased regional cerebral metabolic ratio of oxygen (rCMRO2) in the right temporo-parietal area. The hypometabolism involved the right basal temporal region as well as the superior temporal and inferior parietal regions, but spared the frontal lobes. The patient's neurobehavioral signs were similar to the basal frontal syndrome. However, as there was no evidence of involvement of the frontal lobes in MR and PET studies, the neurobehavioral syndrome in our patient was likely caused by the temporo-parietal ischemic lesion. Frontotemporal dementia was unlikely, because her symptoms were not deteriorated during 7 years after the onset and because the left frontotemporal area was not involved.... (author abst.) |
|
|
|
Related Articles;
|
|
