detect_spikes_()

Detect spikes from each site and group coincident spikes (within time range P.spkRefrac_ms) from nearby sites (within spatial range P.maxDist_site_um, r1 in the figure). Coincident spikes are removed if there exists larger spikes within the spatiotemporal range, but spike waveforms occurring in adjacent sites are later captured (mn2tn_wav_()) by including the sites within a fixed radius (P.maxDist_site_spk_um, r2 in the figure).

Syntax

• [viTime_spk, vrAmp_spk, viSite_spk] = detect_spikes_(mnWav3, vnThresh_site, vlKeep_ref, P)

Input

• mnWav3: filtered traces (nSamples_load x nSites: int16)
• vnThresh_site: Detection threshold for each site (nSites x 1: int16).
• vlKeep_ref: logical vector to enable spike detection (nSamples_load x 1: logical)
• P: Parameters struct (P)

Output

• viTime_spk: Spike times
• vrAmp_spk: Spike amplitudes
• viSite_spk: Spike sites

Operations

• spikeDetectSingle_fast_(): Perform spike detection independently for each channel based on threshold crossing of turning points. The operation is performed on GPU if available.
• spikeMerge_(): Removes coincident spikes if there are larger spikes within the time range (P.spkRefrac_ms) and spatial range (P.maxDist_site_um).
  • spikeMerge_single_(): Perform the merge operation for each channel in parallel using multiple CPU cores.

See also

wav2spk_(), file2spk_(), detect_()