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 3 of 44 in the MU Sofia syllabus for Anatomy (Internal Organs+Glands) (Medicine, Years 1 and 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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