Complex sentence: It usually involves a series of sessions in which the patients learn to relax their limbs, heart, breathing, to induce a pleasant, warm feeling, but to induce a feeling of coolness in the forehead.
Split into simpler sentences: It usually involves a series of sessions in which the patients learn relax their limbs, heart, and breathing. The goal is to induce a pleasant, warm feeling throughout most of the body but induce a feeling of coolness in the forehead.