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. 1998 Dec 1;513(Pt 2):587–597. doi: 10.1111/j.1469-7793.1998.587bb.x

Figure 6. Galvanic stimulation after selective right vestibular nerve section.

Figure 6

The patient was studied 2 months after selective vestibular nerve section: averaged responses (n= 256) to galvanic stimulation (5 mA, 2 ms) in unrectified EMG of both SCM muscles. The traces on the left show responses to transmastoid stimulation with the cathode on the intact (left) side. The middle traces show responses to unilateral stimulation with the cathode on the intact (left) side, and the traces on the right show responses to unilateral stimulation with the cathode on the sectioned (right) side. The vertical dashed lines show the time of stimulus onset, while the horizontal dashed lines show the period over which the EMG signal was clamped to minimize stimulus artifact. The response to transmastoid stimulation (both p13/n23 [g] in left SCM and n12/p20 [g] in right SCM) is the result of the action of the cathode on the intact (left) side. No responses were observed with unilateral stimulation on the sectioned (right) side.