Spontaneous Pain and Pain Sensitivity in Response to Prolonged Experimental Sleep Disturbances-Potential Sex...

Area of Science:

• Neuroscience
• Pain Research
• Sleep Science

Background:

• Insomnia is a common condition linked to chronic pain disorders, often exhibiting significant sexual dimorphism.
• Understanding how sleep disturbances impact pain is crucial, particularly given sex-based differences in pain perception.

Purpose of the Study:

• To investigate the effects of experimental insomnia-like sleep disturbances (ESD) on spontaneous pain and pain sensitivity.
• To determine if biological sex modulates these pain responses.

Main Methods:

• Twenty-four healthy adults (50% female) underwent two 19-day protocols: experimental sleep disturbances (ESD) and control sleep (CS).
• Spontaneous pain was rated during daytime and nighttime wake periods.
• Pain sensitivity was assessed using pressure and heat pain thresholds.

Main Results:

• Females reported higher daytime pain ratings under ESD compared to males (condition*sex interaction).
• Spontaneous pain increased during nighttime and worsened across sleep disturbance nights, irrespective of sex.
• Females showed increased pressure pain sensitivity, while males exhibited increased heat pain sensitivity under ESD (condition*sex interaction).

Conclusions:

• Pain responses to sleep disturbances are strongly sex-dependent, potentially explaining sex differences in chronic pain prevalence.
• Sleep disturbances amplify spontaneous pain and pressure pain sensitivity more in females than males.
• Findings suggest targeted nighttime pain management strategies for individuals with sleep disturbances.