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2009•Chinese Journal of Minimally Invasive NeurosurgeryRequires access

Electrophysiological characteristics of brain stem trigeminal evoked potentials

Youqiang Meng

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Abstract

Objective To investigate the characteristics of brain stem trigeminal evoked potentials(BTEP) waveform.Methods Twenty patients without trigeminal neuralgia received craniotomy under general anesthesia.The peripheral branch of trigeminal nerve was stimulated by needle electrode and the waveform of BTEP was recorded overhead,then the data of the latencies,amplitudes and intervals was analyzed statistically.Results Three waveforms of W1,W2,W3 can be recorded in each patient.W1 was a three-phase high amplitude wave,while W2 and W3 were negative single-phase waves.With the increasing of stimulus intensity,the amplitudes of W1,W2 and W3 were increased but no changes in latency in a certain range.Conclusion Needle electrode stimulation can get satisfactory BTEP waveforms,and provide a basis for the changes of BTEP in trigeminal neuralgia patients with microvascular decompression in further research.

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Objective To investigate the characteristics of brain stem trigeminal evoked potentials(BTEP) waveform.Methods Twenty patients without trigeminal neuralgia received craniotomy under general anesthesia.The peripheral branch of trigeminal nerve was stimulated by needle electrode and the waveform of BTEP was recorded overhead,then the data of the latencies,amplitudes and intervals was analyzed statistically.Results Three waveforms of W1,W2,W3 can be recorded in each patient.W1 was a three-phase high amplitude wave,while W2 and W3 were negative single-phase waves.With the increasing of stimulus intensity,the amplitudes of W1,W2 and W3 were increased but no changes in latency in a certain range.Conclusion Needle electrode stimulation can get satisfactory BTEP waveforms,and provide a basis for the changes of BTEP in trigeminal neuralgia patients with microvascular decompression in further research.

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Available abstract

Objective To investigate the characteristics of brain stem trigeminal evoked potentials(BTEP) waveform.Methods Twenty patients without trigeminal neuralgia received craniotomy under general anesthesia.The peripheral branch of trigeminal nerve was stimulated by needle electrode and the waveform of BTEP was recorded overhead,then the data of the latencies,amplitudes and intervals was analyzed statistically.Results Three waveforms of W1,W2,W3 can be recorded in each patient.W1 was a three-phase high amplitude wave,while W2 and W3 were negative single-phase waves.With the increasing of stimulus intensity,the amplitudes of W1,W2 and W3 were increased but no changes in latency in a certain range.Conclusion Needle electrode stimulation can get satisfactory BTEP waveforms,and provide a basis for the changes of BTEP in trigeminal neuralgia patients with microvascular decompression in further research.

Key concepts: Trigeminal neuralgia, Microvascular decompression, Trigeminal nerve, Medicine, Electrophysiology, Stimulus (psychology), Waveform, Peripheral

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