Effect of sleep deprivation on gait complexity

Area of Science:

• Neurology
• Chronobiology
• Motor Control

Background:

• Gait complexity reflects neuromuscular adaptability.
• Chronobiology influences gait dynamics and physiological systems.
• Sleep-wake cycle disruption may affect gait complexity.

Purpose of the Study:

• Investigate the effect of one night of sleep deprivation on gait complexity and variability.
• Explore implications for motor control.
• Examine the association between gait complexity changes and chronotype.

Main Methods:

• Seventeen healthy young males underwent 24-hour supervised sleep deprivation.
• Gait complexity and variability assessed using detrended fluctuation analysis and coefficient of variation.
• Chronotype assessed via the Morningness-Eveningness Questionnaire.

Main Results:

• Sleep deprivation significantly reduced gait complexity (PRE: 0.8 ± 0.13; POST24: 0.62 ± 0.08, p < 0.001).
• Gait variability remained unchanged (p = 0.132).
• Greater loss of gait complexity correlated with morning chronotype (r = -0.665, p = 0.004).

Conclusions:

• Sleep deprivation decreases neuromuscular adaptability in gait.
• Chronobiology plays a role in motor control, with morning types more affected.
• Sleep deprivation impacts central processes governing gait complexity.