Pattern of brain evoked potentials to tongue electrical stimulation using vector synthesis method.
Project/Area Number |
06807146
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Research Category |
Grant-in-Aid for General Scientific Research (C)
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Allocation Type | Single-year Grants |
Research Field |
Functional basic dentistry
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Research Institution | Matsumoto Dental College |
Principal Investigator |
KUMAI Toshifumi Dental, Oral Physiol., Matsumoto Dental College, Assistant Prof., 歯学部・口腔生理, 講師 (30104871)
|
Project Period (FY) |
1994 – 1995
|
Project Status |
Completed (Fiscal Year 1995)
|
Budget Amount *help |
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1995: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1994: ¥800,000 (Direct Cost: ¥800,000)
|
Keywords | EEG / tongue stimuli / vector synthesis / 味覚中枢 |
Research Abstract |
Although, cortical evoked potentials in respons to trigeminal nerve stimulation have been often reported by many authers, that to tongue stimulation of gustatory or somatosensory have not yet. In this study, first the averaged evoked potentials (AEP) to flash stimulation, click auditory stimulation, and electrical shock to hands were studied, secondary those to electrical stimulation of the tongue were analyzed using a method of vector synthesys between the AEPs. it is well known that light stimulation induces positive and negative four peaks of AEP mainly at the occipital region, auditory stimulation, five positive peaks, mainly at the midline central, and similar results were obtained in this study. Concerning that the auditory potentials are induced from the midline central, is is considered that the currents of nerve cells tend to flow through the midline space of the brain in relation to the position of the auditory center. Although the AEPs to the tongue stimulation varied with trials and subjects, mainly induced at the midline central. As the center of the brain relating tongue sensation lies in bilateral middle temporal, the strong potentials of the midline central to the tongue electrical stimulation might be relate the position of the synaptic center in the brain. The variability of the AEPs might suggest the unreliability of connection between sensory signals and motor outputs, such as tongue movements or salivery secretion.
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Report
(3 results)
Research Products
(4 results)