Intellectual cycle
33-day cycle
The intellectual cycle is conventionally assigned a 33-day period. The head placement visualises the category and is not a validated cognitive or neurological marker.
Point 3 of 3 in Biorhythm Cycles
Cross-tradition overlaps
No overlapping points are registered for this point.
Sources
Swoboda, Fliess, and Tomcshario biorhythm history (scholarly_modern)
Documents the historical 23-, 28-, and 33-day biorhythm proposals and their later treatment as pseudoscience; see Hines, chapter 5.