<prompt> Safety muscle of tongue is?GenioglossusPalatoglossusStyloglossusHyoglossus  <response>: Ans. A GenioglossusRef: BDC, 5th ed. pg. 252 Genioglossus is a fan shaped, bulkiest muscle of tongue. It is originated from upper genial tubercle of mandible and inserted into tip of tongue and into hyoid bone. Function -It retracts and depresses the tongue. It is also known as life saving muscle because it pulls the posterior part of tongue forwards and protrudes the tongue forwards.Extra Mile MOTOR: All the extrinsic and intrinsic muscles of tongue are supplied by hypoglossal nerve EXCEPT palatoglossus, which is supplied by the cranial root of accessory nerve through the pharyngeal plexus. SENSORY: Anterior 23rd by facial nerve lingual branch; posterior 13rd glossopharyngeal.Posterior most or valeculla is supplied by vagus nerve. 