Definition of couth. good or someone that is cool. In contrast to uncouth: bad or someone that is stupid.His ass is so couth!
Chapter 7 - Lower cranial nerve function. The lower cranial nerves are involved in pharyngeal and laryngeal function as well as in movements of the neck and tongue. Damage usually manifests as problems with speech and swallowing. These nerves arise from the medulla and, in the case of the accessory nerve (CN XI), the spinal cord. These nerves are commonly affected by conditions damaging the medulla, but bilateral damage to corticobulbar connections can create motor problems that affect tongue and pharynx movement and speech.
Itâs a condition that causes nerve cells to die. The twitching can affect the muscles in any part the body, but it usually occurs in the arms and legs first. Spinal muscular atrophy damages the motor nerve cells in the spinal cord, affecting the control of muscle movement. It can cause the tongue to twitch.