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The hyoglossus is a thin and quadrilateral extrinsic muscle of the tongue. It originates from the hyoid bone; it inserts onto the side of the tongue. It is innervated by the hypoglossal nerve (cranial nerve XII). It acts to depress and retract the tongue.
The hypoglossal nerve provides motor control of the extrinsic muscles of the tongue: genioglossus, hyoglossus, styloglossus, and the intrinsic muscles of the tongue. [2] These represent all muscles of the tongue except the palatoglossus muscle, which is innervated by the vagus nerve. [2] The hypoglossal nerve is of a general somatic efferent ...
It begins by numerous branches from the superficial surface of the gland, and runs forward between the mylohyoid, hyoglossus, and genioglossus muscles. It then passes between the sublingual gland and the genioglossus and opens by a narrow opening on the summit of a small papilla (the "sublingual caruncle") at the side of the frenulum of the tongue.
The intrinsic muscles of the tongue (XII) contract to make a trough (a longitudinal concave fold) at the back of the tongue. The tongue is then elevated to the roof of the mouth (by the mylohyoid (mylohyoid nerve—V 3 ), genioglossus , styloglossus and hyoglossus (the rest XII)) such that the tongue slopes downwards posteriorly.
side of tongue: hypoglossal nerve [CNXII] depresses tongue: 2 1 chondroglossus: head, tongue (left/right) lesser cornu and body of hyoid bone: intrinsic muscular fibers of tongue: hypoglossal nerve [CNXII] depresses tongue (some consider this muscle to be part of hyoglossus) 2 1 styloglossus: head, tongue (left/right) styloid process of ...
The tongue is only one of the 10 ways you can see disease written all over your face. There are a whole host of other reasons for bumps on the tongue. Bumps on the tongue come in many other varieties.
The tongue is an important accessory organ in the digestive system. The tongue is used for crushing food against the hard palate, during mastication and manipulation of food for softening prior to swallowing. The epithelium on the tongue's upper, or dorsal surface is keratinised. Consequently, the tongue can grind against the hard palate ...
The inferior longitudinal muscle of tongue is an intrinsic muscle of the tongue. [1] It is situated on the under surface of the tongue between the genioglossus and hyoglossus. [citation needed] It is innervated by the hypoglossal nerve (cranial nerve XII). Its contraction shortens and thickens the tongue.