Thermoregulation following spinal cord injury

Area of Science:

• Physiology
• Thermoregulation
• Neurology

Background:

• Spinal cord injury (SCI) alters physiological responses impacting heat balance.
• Reduced muscle mass affects heat production, while blood redistribution and impaired sweating below the lesion affect heat dissipation.
• The interplay between these factors is crucial for achieving thermal homeostasis.

Purpose of the Study:

• To investigate the thermoregulatory differences between individuals with spinal cord injuries (paraplegia and tetraplegia) and able-bodied individuals.
• To compare core and skin temperature responses during rest and exercise in various environmental conditions.
• To identify specific challenges in heat balance for individuals with SCI.

Main Methods:

• Comparison of core and skin temperature measurements in individuals with paraplegia and tetraplegia versus able-bodied controls.
• Assessment of thermoregulatory responses during rest and exercise in both cool and hot environments.
• Evaluation of heat retention and dissipation capacities.

Main Results:

• Individuals with SCI exhibit cooler lower-body skin temperatures and impaired anticipatory thermoregulation.
• Paraplegia: Similar body temperature during exercise in cool conditions, but heat retention during recovery. Comparable temperature regulation to able-bodied during exercise in heat.
• Tetraplegia: Continual core temperature increases and significant heat retention, indicating thermal imbalance, particularly in heat.

Conclusions:

• Spinal cord injury significantly affects thermoregulation, with varying impacts based on injury level (paraplegia vs. tetraplegia).
• Individuals with tetraplegia face substantial thermal imbalance, especially during exercise in heat.
• Further research is needed on sweating responses, lesion completeness, and perceptual responses to environmental challenges in SCI.