motor neuron connecting to muscle fiber, 3d

motor neuron neuromuscular junction myoneural muscle fiber signal transmission contraction movement nervous system synapse central peripheral nerve gases botulinum toxin clostridium tetanus tetanospasmin tetani latrotoxin venom widow spider snake myasthenia gravis disease lamberteaton myasthenic syndrome lems neuromyotonia nmt isaacs genetic congenital bulbospinal muscular atrophy spinal kennedys duchenne dystrophy 3d illustration sma