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A total of nine flexor tendons (not the muscles themselves) pass through the carpal tunnel: 1  flexor digitorum profundus (four tendons) 2  flexor digitorum superficialis (four tendons)  flexor pollicis longus (one tendon)
Carpal Tunnel Causes and Contributing Metabolic Factors. 1  Obesity Can Contribute to The Cause of CTS. 2  Hypothyroidism Can Initiate the Onset of CTS. 3  Renal Dysfunction is reported to Cause CTS.  Gout Can Contribute to Carpal Tunnel 1  Symptoms. Rheumatoid Arthritis Compels Carpal Tunnel.  Diabetes Over Time May Cause Carpal Tunnel.