Anatomy
The thin strip of tissue that runs vertically from the floor of the mouth to the undersurface of the tongue is called the lingual frenulum. It tends to limit the movement of the tongue, and in some people, it is so short that it actually interferes with speaking.
The base of the frenulum contains a "V" shaped hump of tissue in the floor of the mouth which houses a series of saliva gland ducts. The two largest ducts are in the center just in front of the attachment of the lingual frenulum and are called Wharton's Ducts. They empty the submandibular (submaxillary) and sublingual salivary glands. These ducts can be quite active in some persons, and upon occasion, a "fountain" of saliva may erupt from them during speech. The sublingual saliva glands empty through a series of tiny ducts in the tissue on either side of Wharton's ducts.
Superficial veins run through the base of the frenulum known as varicosities. Their presence is normal, becoming more and more prominent as the patient ages.
Read more about this topic: Frenulum Of Tongue
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