Covers the tongue's basic structure: its apex, root, body and two surfaces, with the ventral surface's frenulum, deep lingual veins and fimbriated folds. The dorsal surface is described through the V-shaped sulcus terminalis, dividing it into oral and pharyngeal parts with their differing embryological origins. It then sets out the arterial and venous drainage, and closes with a table listing the origin, insertion, innervation and function of the four extrinsic and four intrinsic muscles.
Topic 52 of 264 in the MU Sofia syllabus for Anatomy (Dental Medicine, Year 2). The free AceMed note covers it in 4 sections, about 273 words (3 min of reading), with 10 flashcards.
In this note
TONGUE
Surfaces of the tongue :
Blood Supply :
Musculature of the tongue:
TONGUE
The tongue is a muscular organ covered by mucous membrane. It is concerned with taste, deglutition, and speech.
It has apex, root, body, and 2 surfaces (dorsal and ventral).
Apex: is directed anteriorly touching the lower incisor teeth.
Root: is attached to mandible and hyoid bone.
Ventral (inferior) surface: is smooth.
Dorsal surface: is rough.
Surfaces of the tongue :
Ventral Surface :
It shows the following:
Frenulum lingue: formed by the mucosa in the median plane between the tongue and floor of the mouth.
Deep lingual vein: on either sides of the frenulum.
Fimbriated fold: plica fimbriata lateral to the deep lingual vein.
Dorsal Surfaces :
It is divided by V-shaped sulcus terminalis into anterior 2/3 and posterior 1/3.
The apex of the sulcus: is directed posteriorly. It is marked by foramen caecum (?).
Anterior 2/3 are called: oral part of the tongue.
Posterior 1/3 is called: pharyngeal part of the tongue.
√ Anterior 2/3 :
Called the oral part (anterior to palatoglossal arches).
Develops from 1st pharyngeal arch.
Thick & rough (has papillae)
√ Posterior 1/3
Called pharyngeal part.
Develops from 4th pharyngeal arches.
Thin & smooth
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