Genetic Biomarkers of Intermittent Hypoxia-Induced Respiratory Motor Plasticity in Chronic SCI
Acute intermittent hypoxia (AIH) involves brief (1 min), repeated episodes (\ 15) of breathing low oxygen air to stimulate spinal neuroplasticity. Animal and human studies show that AIH improves motor function after spinal cord injury, particularly with slightly increased carbon dioxide (hypercapnic AIH; AIHH) and task-specific training. Using a double blind cross-over design, the study will test whether AIHH improves breathing more than AIH and whether specific genetic variations are related to individuals' intervention responses.
• Adults 18-70 years of age
• Chronic incomplete SCI ≥ 1 year at or below C1-T12
‣ Incomplete SCI based on residual sensory and motor function below the level of the injury or injury classification of B, C, D at initial screening according to the American Spinal Injury Association Impairment Classification and the International Standards for the Neurological Classification of SCI.
⁃ OR- Chronic complete SCI ≥1 year at or below C4-T12
⁃ Complete SCI based on the absence of residual sensory or motor function below the level of injury or injury classification of A at initial screening according to the American Spinal Injury Association Impairment Classification and the International Standards for the Neurological Classification of SCI.
• Medically stable with physician clearance
• SCI due to non-progressive etiology
• 20% impairment in maximal inspiratory, maximal expiratory pressure generation, or both relative to normative values