Mental walking through a complex maze influences lateralized ultradian rhythms

Area of Science:

• Neuroscience
• Chronobiology
• Human-Computer Interaction

Background:

• Ultradian rhythms, biological cycles shorter than 24 hours, influence cognitive functions.
• Previous research indicated sex differences in lateralized ultradian rhythms under quiet conditions.
• Artificial environments can simulate real-world complexities and impact cognitive processes.

Purpose of the Study:

• To investigate the influence of spatial complexity in artificial environments on ultradian rhythms of tactile discrimination.
• To examine potential sex differences in the response of these rhythms to environmental complexity.

Main Methods:

• Participants (10 males, 10 females per group) navigated simple and complex computer-generated city mazes for eight hours.
• Tactile discrimination was measured every 15 minutes in both hands.
• Ultradian variations in tactile error rates were analyzed for periodicity and lateralization.

Main Results:

• Ultradian rhythms (2-3 hour periods) were observed in tactile error rates for both left and right hands.
• The spatial complexity of the artificial maze significantly influenced these lateralized rhythms in both sexes.
• Sex-specific patterns in rhythm modulation by environmental complexity were identified.

Conclusions:

• Endogenous rhythms operate separately in the left and right cerebral hemispheres.
• Spatial complexity of the environment modulates these lateralized ultradian rhythms in a sex-specific manner.
• Findings have evolutionary implications for understanding brain function and environmental interaction.