3,8% of the general population suffer from Carpal Tunnel Syndrome (CTS), which is common form of median nerve entrapment (Ibrahim et al., 2012). In the UK the number of days away from work due to carpal tunnel syndrome is at 27 days.
Movements of the wrist have an effect on the shape and width of the carpal tunnel. Also, the width of the tunnel decreases with extension and flexion movement, which is also influenced by the metacarpal bones moving against each other with each movement (Ghasemi-rad et al., 2014),
Reduced space inside the carpal tunnel will place pressure on the median nerve and can result in symptoms of pain and numbness. This can occur through overuse of muscles or fluid retention for example during pregnancy.
Management of mild to moderate symptoms usually respond well to non-surgical treatment, such as wrist splints, activity modification, and occasionally corticosteroids injections. However, more severe cases may require surgery to reduce the pressure on the median nerve.
Ibrahim I. et al., 2012, Carpal Tunnel Syndrome: A Review of the Recent Literature, Open Orthopaedics Journal, 6. Pp: 69-76
Ghasemi-rad et al., 2014, A handy review of carpal tunnel syndrome: From anatomy to diagnosis and treatment, World Journal of Radiology, 6(6), pp: 284-300