 This research paper examined the effects of two different types of transcutaneous electrical nerve stimulation, TENS, on somatosensory cortex activity and sensory perception. One type of TENS used a pulse width modulation, PWM, pattern, which involves applying a series of short electrical pulses to the skin over the affected area. The other type of TENS used a non-modulated high-frequency, NMHF, pattern, which involves applying a continuous stream of electrical pulses to the skin. Both types of TENS were found to reduce sensory perception, but only the PWM TENS was able to reduce sensory perception without reducing cortical activity. This suggests that PWM TENS may be more effective than NMHF TENS for treating phantom limb pain. This article was authored by Armeeta Fagani-Jadadai, Winnie Jensen, Alias Garzarii and others.