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Average TMS-evoked potentials and measure canonical peaks

Source: R/tms-eeg.R
tepAverage.Rd

Baseline-corrects every trial and channel before a mean or trimmed mean, then finds signed peaks independently in each requested channel.

Usage

tepAverage(
  x,
  components = c("N15", "P30", "N45", "P60", "N100", "P180"),
  windows_ms = NULL,
  channels = NULL,
  baseline_window_ms = c(-200, -20),
  epoch_start_ms = 0,
  average = c("mean", "trimmed"),
  trim = 0.2,
  assay_name = NULL
)

Arguments

x

A PhysioExperiment containing epoched TMS-EEG.

components

Exact canonical component names in requested order.

windows_ms

Optional named component x 2 override matrix.

channels

Optional exact labels or 1-based indices.

baseline_window_ms

Closed baseline interval.

epoch_start_ms

Time of the first sample relative to the pulse.

average

Exactly "mean" or "trimmed".

trim

Trim fraction in [0, 0.5).

assay_name

Optional assay name.

Value

A tms_tep list with waveform, component, and settings tables.

Details

Default signed peak windows are N15 (10–20 ms), P30 (20–40 ms), N45 (35–55 ms), P60 (50–75 ms), N100 (80–140 ms), and P180 (140–220 ms). Exact ties use the earliest sample and a peak on a window endpoint is marked as a boundary diagnostic. Canonical names define measurement windows only. Auditory and somatosensory responses can remain, and no component is evidence of a verified cortical source.

References

Rogasch NC, Sullivan C, Thomson RH, et al. (2017). Analysing concurrent transcranial magnetic stimulation and electroencephalographic data. NeuroImage, 147:934-951. doi:10.1016/j.neuroimage.2016.10.031