The effects of stimulants on the brain causes disruption of brain neurons or modifying the normal communication that occurs among brain circuits. They are referred as substances that increase certain types of cell signaling and amplify various physiologic processes throughout the brain and body.
Moreover, the effects of stimulant includes the brain processes of sensory information throughout the body, muscle movement and locomotion, bodily functions, thoughts and feelings, perception and moods and thus, create disturbance over the controls of all behavior.