Neurons in the Rat Lateral Hypothalamic Area Integrate Information from the Gastric Vagal Nerves and the Cerebellar Interpositus Nucleus
| Autor: | Yue-Ping Zhang, Jian-Jun Wang, Jing-Ning Zhu, Kun Chen, Hong-Zhao Li |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Blood Glucose
Male medicine.medical_specialty Vagal stimulation Stimulation Stimulus (physiology) Biology Rats Sprague-Dawley Cellular and Molecular Neuroscience Developmental Neuroscience Internal medicine Afferent medicine Animals Upper gastrointestinal Premovement neuronal activity Mannitol Neurons Stomach digestive oral and skin physiology Excitatory Postsynaptic Potentials Vagus Nerve Electric Stimulation Rats Sprague dawley Glucose medicine.anatomical_structure Endocrinology Cerebellar Nuclei nervous system Neurology Hypothalamic Area Lateral Female Nucleus Neuroscience |
| Zdroj: | Neurosignals. 14:234-243 |
| ISSN: | 1424-8638 1424-862X |
| Popis: | Previous investigations have demonstrated that the neuronal activity in the lateral hypothalamic area (LHA) is respectively modulated by afferent inputs from the gastric vagal nerves innervating the upper gastrointestinal tract, as well as the cerebellar interpositus nucleus (IN). The aim of this study was to examine whether the gastric vagal and cerebellar IN inputs converge onto single LHA neurons in rats, especially those sensitive to glycemia. Of the 114 LHA neurons recorded, 60 (52.6%) and 51 (44.7%) responded to gastric vagal and cerebellar IN stimulation, respectively. Of the 60 LHA neurons responsive to gastric vagal stimulation, 30 also responded to the cerebellar IN stimulus, indicating a convergence of gastric vagal and cerebellar inputs onto single hypothalamic cells. When the gastric vagal nerves and cerebellar IN were stimulated simultaneously, a summation of the responses was observed in all 6 neurons tested. Moreover, of 24 neurons that responded to both the gastric vagal and cerebellar IN stimuli, 15 (62.5%) were identified as glycemia-sensitive. These results demonstrate that the visceral information transmitted by the gastric vagal nerves and the somatic information forwarded by the cerebellar IN converge onto single LHA neurons, especially those sensitive to glycemia. The findings also suggest that integration of somatic-visceral responses related to short-term feeding regulation may take place in the LHA. |
| Databáze: | OpenAIRE |
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