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Trigeminal evoked potentials in the cat.

C M Huang, M Feely

    Electroencephalography and Clinical Neurophysiology
    |July 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    Electrical stimulation of the infraorbital nerve in cats produced distinct brainstem evoked potentials. These potentials, similar to auditory and somatosensory responses, originate from the trigeminal nerve pathways.

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    Area of Science:

    • Neuroscience
    • Electrophysiology

    Background:

    • Far-field evoked potentials are valuable tools for studying neural pathways.
    • The infraorbital nerve is a key component of the trigeminal nerve system.

    Purpose of the Study:

    • To characterize the far-field evoked potentials resulting from infraorbital nerve stimulation in cats.
    • To investigate the anatomical origins of these evoked potentials.

    Main Methods:

    • Electrical stimulation of the infraorbital nerve in feline subjects.
    • Recording of far-field evoked potentials at the vertex.
    • Analysis of waveform, amplitude, and latency characteristics.
    • Investigation of anatomical contributions to the evoked potentials.

    Main Results:

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    • A series of multicomponent far-field evoked potentials were observed at the vertex.
    • Individual component amplitudes were approximately 1 microV with latencies under 4 msec.
    • The waveform resembled auditory brainstem and somatosensory far-field responses.

    Conclusions:

    • The study identified specific electrophysiological responses to infraorbital nerve stimulation.
    • Results suggest involvement of the afferent trigeminal nerve, principal sensory nucleus, and spinal trigeminal nucleus.
    • These findings contribute to understanding trigeminal pathway neurophysiology.