In 1991 the brains of 15 persons with an age of at least 60 years and without neurologic or psychiatric disorders were investigated prospectively. Different brain-areas (topographically exactly defined) were investigated for so-called brain-aging. Only the frequency of corpora amylacea and primitive senile plaques showed a tendency to increase in the elderly. A defined correlation to the calendaric age could not be stated.
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Item-Level Analysis of Category Fluency Test Performance: A Systematic Review and Meta-Analysis of Studies of Normal and Neurologically Abnormal Ageing.
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Department of Psychology, College of Health, Medicine and Life Sciences, Brunel University of London, Kingston Lane, Uxbridge, Middlesex, UB8 3PH, UK.
While Category Fluency (CF) is widely used to help profile semantic memory, item-level scoring (ILS) approaches to this test have been proposed to obtain indices that are less influenced by non-semantic supportive functions. We systematically reviewed the literature to test the hypotheses that (1) compared with healthy adults, individuals with a clinical diagnosis suggestive of neurodegeneration generate words of lower semantic complexity; (2) compared with young adults, older adults generate words of higher semantic complexity. We searched six databases (date of search: 8 December 2023) for studies that relied on CF and ILS methods, in normal ageing and in age-associated neurodegeneration.
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January 2025
Laboratory of Neurobiology, Centro de Investigaciones Medico Sanitarias (CIMES), University of Malaga, Calle Marqués de Beccaria, 3, Campus Teatinos s/n, 29010, Malaga, Spain.
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View Article and Find Full Text PDFDeficiency of orexin receptor type 1 in dopaminergic neurons increases novelty-induced locomotion and exploration.
Elife
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Max Planck Institute for Metabolism Research, Department of Neuronal Control of Metabolism, Cologne, Germany.
Orexin signaling in the ventral tegmental area and substantia nigra promotes locomotion and reward processing, but it is not clear whether dopaminergic neurons directly mediate these effects. We show that dopaminergic neurons in these areas mainly express orexin receptor subtype 1 (Ox1R). In contrast, only a minor population in the medial ventral tegmental area express orexin receptor subtype 2 (Ox2R).
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Hypertension
January 2025
Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA (W.Z., D.H., M.A.M., Y.M.).
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