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Somatosensory-evoked potential in clinically normal dogs
American Journal of Veterinary Research
|January 1, 1981
Summary
Researchers identified three main components (n1, p1, n2) in somatosensory-evoked potentials (SEPs) recorded from dogs. These SEPs, generated by peripheral nerve stimulation, show distinct wave patterns and latencies in normal canine subjects.
Area of Science:
- Neuroscience
- Veterinary Neurology
Background:
- Repetitive electrical peripheral nerve stimulation elicits cerebrocortical potentials.
- Somatosensory-evoked potentials (SEPs) are multiphasic potentials reflecting sensory pathway function.
Purpose of the Study:
- To characterize the somatosensory-evoked potentials (SEPs) in clinically normal dogs.
- To identify and describe the primary components and their latencies in canine SEPs.
Main Methods:
- Scalp SEP recordings were performed on 12 clinically normal dogs.
- Dogs were tranquilized using acepromazine prior to stimulation and recording.
- Analysis focused on identifying distinct negative (n1, n2) and positive (p1) deflections and late positive potentials.
Main Results:
- Three consistent potentials, n1, p1, and n2, were identified in canine SEPs.
- Mean peak latencies were 13.5 ± 1.5 ms (n1), 19.6 ± 2.7 ms (p1), and 43.3 ± 10.4 ms (n2).
- Late-positive potentials showed significant variability in latency, ranging from 47.5 to 231.5 ms.
Conclusions:
- The study successfully characterized the typical SEP waveform in normal dogs.
- The identified n1, p1, and n2 potentials provide a baseline for future neurological studies in canines.
- Understanding normal SEP parameters is crucial for diagnosing neurological dysfunction in dogs.