Regional Cerebral Blood Flow in [123]I-IMP Single-photon Emission Computed Tomography and the Wechsler Memory Scale-revised in Nondemented Elderly Subjects with Subjective Cognitive Impairment
| Autor: | Fumitoshi Niwa, Masaki Kondo, Toshiki Mizuno, Kumi Sakurada, Jiro Imanishi, Masanori Nakagawa |
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| Rok vydání: | 2016 |
| Předmět: |
Male
medicine.medical_specialty left inferior frontal gyrus (LIFG) wechsler Memory Scale (WMS) Neuropsychological Tests Single-photon emission computed tomography Audiology computer.software_genre 030218 nuclear medicine & medical imaging Iodine Radioisotopes 03 medical and health sciences 0302 clinical medicine Visual memory Voxel mental disorders Internal Medicine medicine Humans subjective cognitive impairment (SCI) Dementia Cognitive Dysfunction Neuropsychological assessment Aged Cerebral Cortex Tomography Emission-Computed Single-Photon medicine.diagnostic_test business.industry single-photon emission computed tomography (SPECT) Wechsler Adult Intelligence Scale General Medicine Middle Aged medicine.disease Temporal Lobe Cerebral blood flow Cerebrovascular Circulation Female Original Article Cognition Disorders visual memory business computer 030217 neurology & neurosurgery Emission computed tomography |
| Zdroj: | Internal Medicine |
| ISSN: | 1349-7235 0918-2918 |
| Popis: | Objective Regional cerebral blood flow (rCBF) imaging with single-photon emission computed tomography (SPECT) is useful in the early diagnosis of dementia. We aimed to investigate the association between the rCBF and various domains related to the memory function in elderly subjects with subjective cognitive impairment (SCI). Methods Thirty-two subjects with SCI were included in the present study. Patients with dementia and mild cognitive impairment (MCI) were excluded based on the presence of logical memory impairment. N-isopropyl-p-[123I]-iodoamphetamine SPECT was performed and Wechsler Memory Scale-Revised (WMS-R) was administered to all subjects (mean age, 68.4 years; average Mini-Mental State Examination score, 27.6). The SPECT results were analyzed using the easy Z-score imaging system and the voxel-based stereotactic extraction estimation method. Correlation analyses were performed to investigate the correlation between the mean positive Z-scores in the decrease of the rCBF and the WMS-R indices. Results The SPECT study indicated marked hypoperfusion in some areas, including the bilateral temporal areas, the caudate, and the thalamus, in these subjects in comparison to the normal database. The decrease in the rCBF that was observed in several regions, including the left precuneus and left inferior frontal gyrus (LIFG), showed a significant negative correlation with several indices of the memory function, particularly visual memory. Conclusion The regional hypoperfusion observed in the study using the voxel-based stereotactic extraction estimation method suggest that the regional cerebral dysfunction is associated with the memory function of patients with SCI, even though the subjects in the present study were cognitively intact. The correlation analysis with the WMS-R suggested the contribution of the LIFG to the memory function and indicated the significance of visual memory dysfunction in the neuropsychological assessment to determine the stage of SCI. |
| Databáze: | OpenAIRE |
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