 The primary larynx-related functions of the mainly efferent nerve fiber RLN, include the transmission of nerve signals to the muscles responsible for regulation of the vocal folds' position and tension to enable vocalization, as well as the transmission of sensory nerve signals from the mucous membrane of the larynx to the brain.A unilateral injury of the nerve typically results in hoarseness caused by a reduced mobility of one of the vocal folds.It may also cause minor shortages of breath as well as aspiration problems especially concerning liquids.