<Tr> <Th> FMA </Th> <Td> 54659 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> <P> The frenulum of tongue or tongue web (also lingual frenulum or frenulum linguæ; also fraenulum) is a small fold of mucous membrane extending from the floor of the mouth to the midline of the underside of the tongue . </P> <P> The tongue starts to develop at about 4 weeks . The tongue originates from the first, second, and third pharyngeal arches which induces the migration of muscles from the occipital myotomes . A U-shaped sulcus develops in front of and on both sides of the oral part of the tongue . This allows the tongue to be free and highly mobile, except at the region of the lingual frenulum, where it remains attached . Disturbances during this stage cause tongue tie or ankyloglossia . During the sixth week of gestation, the medial nasal processes approach each other to form a single globular process that in time gives rise to the nasal tip, columella, prolabium, frenulum of the upper lip, and the primary palate . As the tongue continues to develop, frenulum cells undergo apoptosis, retracting away from the tip of the tongue, and increasing the tongue's mobility . </P>

What connects the tongue to the floor of the mouth
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