Table 1.
Means and SD of wave I latency (in ms), and absolute amplitude (in μV) for monaurally stimulated ABRs for ipsilateral and midline electrode montages. Also shown is the number of subjects showing an identifiable wave I for each ear and montage.
| Monaural Right Ear Stimulation | Monaural Left Ear Stimulation | |||
|---|---|---|---|---|
| Reference Electrode Location: | Right Earlobe | Midline Nape | Left Earlobe | Midline Nape |
| Wave I Latency (ms) | ||||
| Mean | 1.39 | 1.70 | 1.64 | 1.73 |
| (SD) | (.12) | (.11) | (.11) | (.13) |
| Wave I Peak Amplitude (μV) | ||||
| Mean | .090 | .013 | .099 | .009 |
| (SD) | (.05) | (.03) | (.05) | (.04) |
| # of subjects | 40 | 39* | 40 | 39* |
For midline montage, monaural waveforms were measured twice, once in each session. If a subject had a wave I value at only one measurement session for a given ear stimulation, that value was used, but if a subject had a wave I at both measurement sessions, the average was used in calculating the mean.