Muscle relaxants - drugs that reduce the tone of skeletal muscles with a decrease in motor activity up to complete immobilization. Mechanism of action: blockade of H-cholinergic receptors in synapses stops the supply of nerve impulses to skeletal muscles, and the muscles stop contracting. Relaxation goes from the bottom up, from the tips of the toes to the facial muscles. The diaphragm is the last to relax. The recovery of conductivity is reversed.