The vocal tract is supplied by the hypoglossal nerve and facial nerves. Olfactory sensory neurons project axons to the brain within the olfactory nerve, (cranial nerveI). The central nervous system consist of ganglia connected by nerve cells. Optic neuritis is inflammation of the optic nerve. The thoracic spinal nerve 11 (T11) passes out underneath it. Depolarization of the motor neuron results in neurotransmitters being released from the nerve terminal. Cardiovascular stimuli are carried by the vagus nerve. There is no cutaneous innervation for sensation that stems from the superior gluteal nerve. Bilateral injury to the recurrent laryngeal nerve would cause this condition. Potassium is essential for many body functions, including muscle and nerve activity. There is a risk of damage to the ulnar nerve. The larynx is innervated by branches of the vagus nerve on each side. The afferent limb has nerve fibers running within the optic nerve (CN II). It is one of the terminal branches of the common peroneal nerve. Each efferent limb has nerve fibers running along the oculomotor nerve (CN III).