Increased electrical and metabolic activity in the dorsal raphe nucleus of Parkinsonian rats.
نویسندگان
چکیده
Serotonin (5-HT) containing neurons in the dorsal raphe nucleus (DRN) may play important roles in Parkinson's disease (PD). This study investigated neural and metabolic activity of the DRN in animal PD models based on dopamine depletion. The data show both increased firing rate of DRN 5-HT neurons and increased cytochrome oxidase activity in dopamine-depleted rats, as compared to controls. These data support the hypothesis that the DRN 5-HT system is hyperactive in the dopamine-depleted brain.
منابع مشابه
The effect of desmopressin infusion into dorsal raphe nucleus on pain modulation and morphine analgesia in rats tail flick reflex
Recent neuroanatomical and behavioral evidence has indicated that vasopressin (VA) increases pain threshold. The dorsal raphe nucleus (DRN) is an important nucleus in pain modulation. Anatomical studies have shown that DRN receives vasopressinergic fibers originating in the hypothalamic paraventricular nucleus. The aim of the present study was to examine the effects of intra-DRN injection of de...
متن کاملThe effect of desmopressin infusion into dorsal raphe nucleus on pain modulation and morphine analgesia in rats tail flick reflex
Recent neuroanatomical and behavioral evidence has indicated that vasopressin (VA) increases pain threshold. The dorsal raphe nucleus (DRN) is an important nucleus in pain modulation. Anatomical studies have shown that DRN receives vasopressinergic fibers originating in the hypothalamic paraventricular nucleus. The aim of the present study was to examine the effects of intra-DRN injection of de...
متن کاملThe Effects of Lidocaine Reversible Inactivation of the Dorsal Raphe Nucleus on Passive Avoidance Learning in Rats
Introduction: The role of serotonergic fibers in avoidance learning is controversial. Involvement of the dorsal raphe nucleus (DRN), the main source of hippocampal projecting serotonergic fibers in acquisition, consolidation and retrieval of passive avoidance (PA) learning, was investigated by functional suppression of this area. Materials and Methods: DRN functional inactivation was done by li...
متن کاملاثر تحریک الکتریکی هسته رافه خلفی بر پاسخ برانگیخته نورونهای لایه IV و V قشر بارل (بشکهای) در موش صحرایی
Effect of the Dorsal Raphe Nucleus Electrical Stimulation on Evoked Response of the IV Layers and V Barrel Cortical Neurons in Rat M.R Afarinesh MSc , V. Sheibani PhD , R. Farazifard MSc 1, M. Abasnegad PhD , A. Shamsi zadeh MSc Received: 17/09/06 Sent for Revision: 13/03/07 Received Revised Manuscript: 13/06/07 Accepted: 27/06/07 Background and Objective: Seretonergic pathway is one of the neu...
متن کاملEffects of 5,7 dihyroxytryptamine injection in dorsal and median raphe nuclei on morphine dependenc
previous studies have shown that morphine addiction is caused by abnormality in neurotransmission system.serotonin is one of the most important neurotransmiters involved in addiction.the dorsal and median raphe nuclei are the important sites that synthesize and release this neurotransmiters in this study we have injected 5,7 dihyroxytryptamine a serotonergic neurotoxin into the dorsal and medi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Brain research
دوره 1221 شماره
صفحات -
تاریخ انتشار 2008