الفهرس 
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Abstract
Carpal tunnel syndrome is an entrapment mononeuropathy, caused by compression of the median nerve at the wrist. The aim of the present study was to investigate and compare between low level laser and ultrasound in treatment of carpal tunnel syndrome. Fifty patients diagnosed as unilateral carpal tunnel syndrome participated in the study. Their ages ranged from 25-55 years. They were equally divided and randomly assigned into two groups, each group consisted of 25 patients, Patients in group (A) received a program of IR Gallium Arsenide LLLT (wavelength 904 nm, average power 20 mw, laser probe 7 mm diameter), An energy of 1.2 J per point at four points was applied, while patients in group (B) received a program of US (frequency 1MHz, power 1.0 W/cm², pulsed mode 1:5). Data obtained from both groups pre and post treatment (at 6 weeks) regarding pain, hand grip, pinch grip, distal motor latency (DML), distal sensory latency (DSL), motor nerve conduction velocity (MCV), and motor amplitude of action potentials (AMP) of the median nerve were statistically analyzed and compared. The results of our study showed that there were no statistical significance differences (P>0.05) were observed between the two groups. It was concluded that both low level laser (904 nm Wavelength) and ultrasound (1.0 w/cm²) are effective in the treatment of mild and moderate CTS patients.