Fatigue after spinal cord injury

Area of Science:

• Neurology
• Rehabilitation Medicine
• Physiology

Background:

• Spinal cord injury (SCI) can lead to significant and persistent fatigue, affecting patient recovery and long-term well-being.
• Understanding the distinct types and underlying mechanisms of fatigue post-SCI is crucial for developing effective management strategies.

Purpose of the Study:

• To identify key variables contributing to fatigue following spinal cord injury (SCI).
• To explore the functional consequences of different types of fatigue in SCI individuals.

Main Methods:

• Conducted a comprehensive literature search of Medline and Reedoc databases.
• Utilized keywords including SCI, fatigue, intrinsic muscular fatigue, chronic fatigue, aging, training, and electrostimulation.

Main Results:

• Identified two primary types of fatigue post-SCI: intrinsic (peripheral) and chronic.
• Intrinsic fatigue stems from muscle denervation and metabolic changes, measurable via electrophysiology.
• Chronic fatigue, associated with aging and deconditioning, may have central origins and resembles post-polio and chronic fatigue syndromes.

Conclusions:

• Intrinsic fatigue in SCI is peripheral, affecting paralyzed muscles.
• Chronic fatigue significantly diminishes quality of life, particularly with aging.
• Electrostimulation may mitigate intrinsic fatigue, while training can delay chronic fatigue and improve quality of life.