Carpal tunnel syndrome

Carpal tunnel syndrome = entrapment neuropathy of the median nerve at the wrist.
    Paresthesias

    Pain localized to the wrist or radiate to the forearm, arm and rarely shoulder.
    Nocturnal paresthesia awaken from sleep
    Sensory involved early
    Weakness: buttoning shirts, opening jars, or turning doorknobs
    Neurologic examination:
        Tinel's sign, Phalen's maneuver,
         weakness of thumb abduction and opposition
    NCV findings:
        (1) slowing of the distal motor and sensory latency in the median nerve
        (2) decreased SAP amplitude in the median nerve
        (3) decreased CMAP amplitude in the median nerve
        (4) prolong minimum F wave latency
    EMG findings:
        APB: normal when mild
                       abnormal:
        PT, FCR, triceps, extensor digitorum communis: to exclude C6-C7 radiculopathy
        FDI: to exclude C8-T1 radiculopathy