MUCOUS MEMBRANE extending from floor of mouth to the under-surface of the tongue.

The labial frenum, also known as the frenulum of the lip, is a mucous membrane fold that attaches the inner surface of the upper or lower lip to the corresponding gum region, containing muscle fibers and blood vessels, which can vary in length and thickness, and may sometimes cause dental issues if it's too tight or short, referred to as a maxillary labial frenum or mandibular labial frenum respectively.

A sensory branch of the MANDIBULAR NERVE, which is part of the trigeminal (5th cranial) nerve. The lingual nerve carries general afferent fibers from the anterior two-thirds of the tongue, the floor of the mouth, and the mandibular gingivae.

A muscular organ in the mouth that is covered with pink tissue called mucosa, tiny bumps called papillae, and thousands of taste buds. The tongue is anchored to the mouth and is vital for chewing, swallowing, and for speech.

'Tongue diseases' is a broad term referring to various medical conditions that primarily affect the structure, function, or appearance of the tongue, including but not limited to infections, inflammatory conditions, autoimmune disorders, congenital abnormalities, and malignancies.

Traumatic injuries to the LINGUAL NERVE. It may be a complication following dental treatments.

A condition characterized by the presence of rudimentary THYROID tissue at the base of the TONGUE. It is due to failed embryonic development and migration of thyroid tissue to its normal location. The lingual thyroid usually cannot maintain adequate hormone production thereby resulting in HYPOTHYROIDISM.