The four printouts that follow were recorded during the same night with the halograph FM and EEG.

The first minute, 0143, shows a pattern that I have seen many times: a sequence of heartbeats where every third beat is three times as strong as a normal beat, 12 of which can be seen below. I have begun to suspect that this may be a phenomenon that only occurs in male subjects. Note that the EEG channels flatline.

12 Strained Heartbeats at 0143

Moving on, two and a half hours later at 0408 there are two such beats right before the onset of a marathon REM session that lasted half an hour.

2 Strained Heartbeats at 0408

And peaked with eye movements like this at 0412:

EOG from EEG at 0412

Only to end again with some strained beats at 0450. No idea what to make of that spike on channel 2, it seems to pop up quite regularly.

Strained Heartbeats at 0450

Download entry as Lucid Scribe Data (LSD) or Comma Separated Values (CSV).