Somatosensory evoked potentials of the dog: recording techniques and normal values

Median and tibial nerve somatosensory evoked potentials (SSEPs) of 5 sedated dogs were studied to determine their normal features and optimal stimulation and recording techniques. Cortical potentials were mapped from an extensive array of skull electrodes as each limb was independently stimulated wi...

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Bibliographic Details
Published in:	Journal of neuroscience methods Vol. 27; no. 3; p. 253
Main Authors:	Vanderzant, C W, Schott, R J, Natale, J E, Pondo, C A, D'Alecy, L G
Format:	Journal Article
Language:	English
Published:	Netherlands 01-04-1989
Subjects:	Animals Dogs Electric Stimulation Evoked Potentials, Somatosensory Female Male Peripheral Nerves - physiology
Online Access:	Get more information
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Summary:	Median and tibial nerve somatosensory evoked potentials (SSEPs) of 5 sedated dogs were studied to determine their normal features and optimal stimulation and recording techniques. Cortical potentials were mapped from an extensive array of skull electrodes as each limb was independently stimulated with subdermal needles. The effects of bandpass and stimulus intensity and rate were also assessed. Three cortical components (P1, N1, P2) were evoked by median or tibial nerve stimulation and were localized along the coronal suture at lateral and medial electrodes, respectively. SSEP voltage varied much more than morphology, topography, or latency. The inion was a stable, indifferent reference site. Cortical SSEP frequency content was mostly below 250 Hz. Maximal SSEP voltage was achieved only at stimulus intensities 2-3 times motor threshold. Appropriate methods minimize technical difficulties and consistently yield legible SSEPs.
ISSN:	0165-0270
DOI:	10.1016/0165-0270(89)90087-3