#brainstem lesion

• Acromiotonia — A pathophysiological condition characterized by a state of marked muscular hypertonia, rigidity, or persistent muscular contracture localized strictly within the body's extremities (hands and feet). This complex neuromuscular phenomenon reflects a structural disruption of myotatic reflexes, typically encountered in pyramidal or extrapyramidal disorders, brainstem lesions, or central motor-neuron disturbances.