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.
Functions. Each of the 12 cranial nerves has a specific function that helps the brain control the actions of the body. 1  The olfactory nerve is involved in the sense of smell. 2  This nerve has access to the cerebral cortex, but does not pass through the thalamus like other cranial nerves. The olfactory nerve is involved in the sense of smell. 2  This nerve has access to the cerebral cortex, but does not pass through the thalamus like other cranial nerves. 3  The optic nerve is involved in the sense of sight. 4  Responsible for vision, damage to this nerve can result in temporary or permanent blindness.