کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6810289 1433603 2011 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Impairment of experience-dependent cortical plasticity in aged mice
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی سالمندی
پیش نمایش صفحه اول مقاله
Impairment of experience-dependent cortical plasticity in aged mice
چکیده انگلیسی
This study addresses the relationship between aging and experience-dependent plasticity in the mouse somatosensory cortex. Plasticity in the cortical representation of vibrissae (whiskers) was investigated in young (3 months), mature (14 months) and old (2 years) mice using [14C]2-deoxyglucose (2-DG) autoradiography. Plastic changes were evoked using two experimental paradigms. The deprivation-based protocol included unilateral deprivation of all but one row of whiskers for a week. In the conditioning protocol the animals were subjected to classical conditioning, where tactile stimulation of one row of whiskers was paired with an aversive stimulus. Both procedures evoked functional plasticity in the young group, expressed as a widening of the functional cortical representation of the spared or conditioned row. Aging had a differential effect on these two forms of plasticity. Conditioning-related plasticity was more vulnerable to aging: the plastic change was not detectable in mature animals, even though they acquired the behavioral response. Deprivation-induced plasticity also declined with age, but some effects were persistent in the oldest animals.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neurobiology of Aging - Volume 32, Issue 10, October 2011, Pages 1896-1905
نویسندگان
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