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Source analysis of short and long latency vestibular-evoked potentials (VsEPs) produced by left vs. right ear air-conducted 500 Hz tone pips.

Todd NP, Paillard AC, Kluk K, Whittle E, Colebatch JG - Hear. Res. (2014)

Bottom Line: Statistical analysis of the vestibular dependent responses indicated a contralateral effect for inion related short-latency responses and a left-ear/right-hemisphere advantage for the long-latency responses.In addition we found evidence of a possible vestibular contribution to the auditory T-complex in radial temporal lobe sources.These last results raise the possibility that acoustic activation of the otolith organs could potentially contribute to auditory processing.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Life Science, University of Manchester, Manchester M13 9PL, UK. Electronic address: neil.todd@manchester.ac.uk.

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Related in: MedlinePlus

Grand means of evoked potentials produced by 500 Hz, 2 ms pips in selected peripheral leads which illustrate short-latency effects from (A) left ear and (B) right ear stimulation at supra-threshold (black) vs. sub-threshold (grey) intensities. For the same stimulus conditions grand means are also illustrated in selected fronto-central and lateral leads which illustrate long-latency effects from (C) left and (D) right ear stimulation at supra-threshold (black) vs. sub-threshold (grey) intensities.
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fig3: Grand means of evoked potentials produced by 500 Hz, 2 ms pips in selected peripheral leads which illustrate short-latency effects from (A) left ear and (B) right ear stimulation at supra-threshold (black) vs. sub-threshold (grey) intensities. For the same stimulus conditions grand means are also illustrated in selected fronto-central and lateral leads which illustrate long-latency effects from (C) left and (D) right ear stimulation at supra-threshold (black) vs. sub-threshold (grey) intensities.

Mentions: Grand means for EPs produced by supra- vs. sub-threshold (−12 dB re. VT) intensities for left and right ear stimulation are shown in Figs. 1 and 2 respectively (with details for selected channels given in Fig. 3), and for left vs. right ear stimulation for supra- and sub-threshold intensities in Figs. 4 and 5 (with details for selected channels given in Fig. 6). As has been established for left ear stimulation (Todd et al., 2014), the sub-threshold condition shows a typical AEP pattern consisting of mid-latency (MLR) Na and Pa waves followed by the long latency (LAEP) N1 and P2 waves, well illustrated in channel Cz (Fig. 5). In contrast, the supra-threshold condition shows the expected changes in morphology. These are characterised by the short-latency waves, which have no auditory correlate, the OVEMP and inion related response N10 and P10 (Figs. 3A, B and 6B), and a later deflection, labelled N42/P52 followed by the LAEP N1 and P2 (Figs. 3C, D and 6D).


Source analysis of short and long latency vestibular-evoked potentials (VsEPs) produced by left vs. right ear air-conducted 500 Hz tone pips.

Todd NP, Paillard AC, Kluk K, Whittle E, Colebatch JG - Hear. Res. (2014)

Grand means of evoked potentials produced by 500 Hz, 2 ms pips in selected peripheral leads which illustrate short-latency effects from (A) left ear and (B) right ear stimulation at supra-threshold (black) vs. sub-threshold (grey) intensities. For the same stimulus conditions grand means are also illustrated in selected fronto-central and lateral leads which illustrate long-latency effects from (C) left and (D) right ear stimulation at supra-threshold (black) vs. sub-threshold (grey) intensities.
© Copyright Policy - CC BY
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4017095&req=5

fig3: Grand means of evoked potentials produced by 500 Hz, 2 ms pips in selected peripheral leads which illustrate short-latency effects from (A) left ear and (B) right ear stimulation at supra-threshold (black) vs. sub-threshold (grey) intensities. For the same stimulus conditions grand means are also illustrated in selected fronto-central and lateral leads which illustrate long-latency effects from (C) left and (D) right ear stimulation at supra-threshold (black) vs. sub-threshold (grey) intensities.
Mentions: Grand means for EPs produced by supra- vs. sub-threshold (−12 dB re. VT) intensities for left and right ear stimulation are shown in Figs. 1 and 2 respectively (with details for selected channels given in Fig. 3), and for left vs. right ear stimulation for supra- and sub-threshold intensities in Figs. 4 and 5 (with details for selected channels given in Fig. 6). As has been established for left ear stimulation (Todd et al., 2014), the sub-threshold condition shows a typical AEP pattern consisting of mid-latency (MLR) Na and Pa waves followed by the long latency (LAEP) N1 and P2 waves, well illustrated in channel Cz (Fig. 5). In contrast, the supra-threshold condition shows the expected changes in morphology. These are characterised by the short-latency waves, which have no auditory correlate, the OVEMP and inion related response N10 and P10 (Figs. 3A, B and 6B), and a later deflection, labelled N42/P52 followed by the LAEP N1 and P2 (Figs. 3C, D and 6D).

Bottom Line: Statistical analysis of the vestibular dependent responses indicated a contralateral effect for inion related short-latency responses and a left-ear/right-hemisphere advantage for the long-latency responses.In addition we found evidence of a possible vestibular contribution to the auditory T-complex in radial temporal lobe sources.These last results raise the possibility that acoustic activation of the otolith organs could potentially contribute to auditory processing.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Life Science, University of Manchester, Manchester M13 9PL, UK. Electronic address: neil.todd@manchester.ac.uk.

Show MeSH
Related in: MedlinePlus