Ultrasound is a sound wave that produces acoustic pressure and is most commonly known as a noninvasive technique for bodily imaging. However, high-intensity focused ultrasound can be used for noninvasive physiotherapy. An example of this the treatment of tumors in the kidneys, as the sound waves of HIFU interacts with tissues in the body. For this thesis, the necessary parameters for ultrasonic stimulation of the central nervous system in rats were characterized.