Estudio (3) Chronic pain (2) Dopaminergic mechanisms (2) Time (2) Rats (2) Pulse (2) Paper (2) Muscles (2) Muscle strength (2) Materials (2) Lips (2) Labyrinth (Ear) (2) Human behavior (2) Evaluation (2) Electromyography (2) Electric stimulation (2) Deglutition (2) Brain stimulation (2) Arm (2) Sistema dopaminérgico (2) Dolor crónico (2) Estudios (2) Pulso (2) Estimulación eléctrica (2) Estimulación cerebral (2) Evaluación (2) Laberinto (2) Ratas (2) Papel (2) Brazos (2)