دانلود مقاله ISI انگلیسی شماره 77223
عنوان فارسی مقاله

شواهدی نشان می دهد که اختلالات حافظه فضایی تحت اوران برداری دهلیزی دو طرفه در موش دائمی است

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
77223 2010 12 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Evidence that spatial memory deficits following bilateral vestibular deafferentation in rats are probably permanent
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Neurobiology of Learning and Memory, Volume 94, Issue 3, October 2010, Pages 402–413

کلمات کلیدی
سیستم دهلیزی؛ هیپوکامپ؛ حافظه فضایی؛ ضایعات دهلیزی؛ داروهای کانابینوئید
پیش نمایش مقاله
پیش نمایش مقاله شواهدی نشان می دهد که اختلالات حافظه فضایی تحت اوران برداری دهلیزی دو طرفه در موش دائمی است

چکیده انگلیسی

Previous studies of rats with bilateral vestibular deafferentation (BVD) have demonstrated spatial memory deficits, suggesting adverse effects on the hippocampus. However, the longest post-operative time interval that has been studied was approx. 5–7 months post-surgery. In this study, we investigated whether rats exhibited spatial memory deficits at 14 months following BVD and whether these deficits could be exacerbated by administration of cannabinoid (CB) drugs. Twenty-eight adult rats were divided into four groups: (1) sham surgery + vehicle; (2) sham surgery + the CB1/CB2 receptor agonist WIN55,212-2 (‘WIN’); (3) BVD + vehicle; and (4) BVD + WIN. WIN (1.0 or 2.0 mg/kg/day) or vehicle, was administered (s.c.) on days 1–10 and 11–20 (respectively), 30 min before the rats performed in a foraging task. On day 21, the CB receptor inverse agonist, AM251 (3.0 mg/kg, s.c.), was administered before WIN or vehicle. To our surprise, BVD animals were impaired in using the visual cues during the probe test in light. In the dark trials, when visual cues were unavailable, BVD animals were unable to use self-movement cues in homing. However, WIN at 2 mg/kg, significantly improved BVD animals’ homing time and number of errors in the dark through strategies other than the improvement in using self-movement cues. Furthermore, AM251 significantly improved heading angle in vehicle-treated animals and the first home choice in WIN-treated animals. These results suggest that at 14 months post-BVD, the animals are not only impaired in path integration, but also piloting and that the spatial memory deficits may be permanent. The involvement of the cannabinoid system is more complicated than expected.

خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.