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Modification of cortical excitability in neuropathic rats: a voltage-sensitive dye study.

Authors
 Myeoung Hoon Cha  ;  Dae Shik Kim  ;  Zang-Hee Cho  ;  Jin-Hun Sohn  ;  Myung-Ae Chung  ;  Hye-Jung Lee  ;  Taick Sang Nam  ;  Bae Hwan Lee 
Citation
 NEUROSCIENCE LETTERS, Vol.464(2) : 117-121, 2009 
Journal Title
 NEUROSCIENCE LETTERS 
ISSN
 0304-3940 
Issue Date
2009
MeSH
Action Potentials ; Animals ; Brain Mapping/methods* ; Evoked Potentials, Somatosensory* ; Fluorescent Dyes ; Male ; Neuralgia/physiopathology* ; Neuronal Plasticity* ; Rats ; Rats, Sprague-Dawley ; Somatosensory Cortex/physiopathology* ; Sural Nerve/injuries* ; Sural Nerve/physiopathology*
Keywords
Optical imaging ; Voltage-sensitive dye ; Nerve injury ; Neuropathic pain
Abstract
Recent advances in optical imaging techniques have made it possible to monitor neural activity and provided powerful tools to reveal the spatiotemporal patterns of neural activity. We used optical imaging to determine whether nerve injury affects excitability of the sensory cortex. Male Sprague-Dawley rats were subjected to neuropathic surgery consisting of a tight ligation and transection of the left tibial and sural nerves while under pentobarbital anesthesia. The rats were reanesthetized with urethane two weeks post-operatively, and the exposed cortex surfaces were stained with a voltage-sensitive dye (di-2-ANEPEQ). After electrical stimulation of the receptive field, optical signals from the cerebral cortex were recorded using an optical imaging system. Increased optical intensity and an enlarged area of activation were observed in the cerebral cortex of neuropathic rats during electrical stimulation compared to normal or sham-operated rats. Higher electric stimulation resulted in more intensity and a larger area of activation in neuropathic rats. These results suggest that cortical excitability, resulting from peripheral stimulation, may be affected by nerve injury, which indicates a degree of neural plasticity
Full Text
http://www.sciencedirect.com/science/article/pii/S0304394009011069
DOI
10.1016/j.neulet.2009.08.024
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Physiology (생리학교실) > 1. Journal Papers
Yonsei Authors
Nam, Taick Sang(남택상)
Lee, Bae Hwan(이배환) ORCID logo https://orcid.org/0000-0003-4719-9021
Cha, Myeoung Hoon(차명훈) ORCID logo https://orcid.org/0000-0002-7993-672X
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/104861
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