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Study of Spinal Cord Evoked Injury Potential by Use of Computer Modeling and in Dogs with Naturally Acquired Thoracolumbar Spinal Cord Compression
Poncelet, Luc; Michaux, Charles; Grauwels, Magda
1998In American Journal of Veterinary Research, 59 (3), p. 300-6
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Abstract :
[en] OBJECTIVE: To add objective measurements of the characteristics of evoked injury potentials (EIP) and their relations to clinical severity in dogs with thoracolumbar spinal cord damage. ANIMALS: 25 dogs with naturally acquired spinal cord compression attributable to disk extrusion or vertebral fracture at the level of the thoracolumbar junction and with various degrees of paresis/paralysis. PROCEDURE: Spinal cord potentials evoked by tibial nerve stimulation were recorded every 5 to 10 mm at the lamina level in the vicinity of the cord compression. This allowed an EIP to be recorded even in the least handicapped dogs. A computer model yielded information about the waveform changes of the EIP in the vicinity of conduction blocks. RESULTS: The EIP waveform changed from biphasic to monophasic a short distance caudad to the location of spinal cord compression. Location of a maximal conduction block was measured in relation to position of the electrodes recording this waveform change. The distance between the assumed conduction block and the actual spinal cord compression was larger in the most affected dogs. The amplitude of the EIP was not related to severity of the clinical picture; however, the proximity of the recording electrode to the spine influenced the amplitude and the waveform of the EIP. CONCLUSION AND CLINICAL RELEVANCE: Change in the EIP waveform from biphasic to monophasic makes it possible to estimate the conduction block location along the spinal cord. A large distance between the assumed conduction block and site of actual cord compression could be an objective argument to confirm severity of a lesion.
Disciplines :
Veterinary medicine & animal health
Author, co-author :
Poncelet, Luc
Michaux, Charles ;  Université de Liège - ULiège > Département de productions animales > Biostatistique, économie, sélection animale
Grauwels, Magda ;  Université de Liège - ULiège > Département clinique des animaux de compagnie et des équidés > Département clinique des animaux de compagnie et des équidés
Language :
English
Title :
Study of Spinal Cord Evoked Injury Potential by Use of Computer Modeling and in Dogs with Naturally Acquired Thoracolumbar Spinal Cord Compression
Publication date :
March 1998
Journal title :
American Journal of Veterinary Research
ISSN :
0002-9645
eISSN :
1943-5681
Publisher :
American Veterinary Medical Association, Schaumburg, United States - Illinois
Volume :
59
Issue :
3
Pages :
300-6
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 13 December 2010

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