Differences in the morphological structure of the human tongue

Area of Science:

• Anatomy and Physiology
• Oral Medicine
• Diagnostic Imaging

Background:

• The tongue's morphology displays considerable individual variability in shape, color, and texture.
• Despite its accessibility for examination, the tongue is often overlooked due to limited research on healthy populations.
• Establishing normal tongue morphology is essential for identifying pathological conditions.

Purpose of the Study:

• To review and assess differences in the morphological structure of the tongue in healthy individuals using existing literature.
• To provide a basis for defining tongue pathology by understanding the range of normal variations.

Main Methods:

• A comprehensive literature review was conducted.
• PubMed and ResearchGate databases were searched for studies on tongue morphology.

Main Results:

• Tongue volume correlates with Body Mass Index (BMI) and stabilizes by the late teens.
• Tongue color typically ranges from pink to white; deviations may signal disease. Papillae characteristics vary with age, region, and systemic health.
• Common tongue conditions include geographic tongue, hairy black tongue, and fissured tongue, with fissuring increasing with age and being more prevalent in males.

Conclusions:

• Variations in tongue morphology offer critical insights into an individual's health status.
• Awareness of physiological tongue changes is vital for accurate medical diagnosis.