Editing Tongue (section)

====Upper surface====
[[File:Foramen caecum.png|thumb|right|200px|Foramen cecum and terminal sulcus labelled above]]
[[File:Tongue.svg|thumb|200px|Features of the tongue surface]]
The upper surface of the tongue, the dorsal surface, is called the dorsum, and is divided by a groove into symmetrical halves by the '''median sulcus'''. The '''foramen cecum''' marks the end of this division (at about 2.5&nbsp;cm from the root of the tongue) and the beginning of the '''terminal sulcus'''. The foramen cecum is also the point of attachment of the [[thyroglossal duct]] and is formed during the descent of the [[thyroid diverticulum]] in [[human embryogenesis|embryonic development]].

The terminal sulcus is a shallow groove that runs forward as a shallow groove in a ''V'' shape from the foramen cecum, forwards and outwards to the margins (borders) of the tongue. The terminal sulcus divides the tongue into a posterior [[pharynx|pharyngeal]] part and an anterior [[Human mouth|oral]] part. The pharyngeal part is supplied by the [[glossopharyngeal nerve]] and the oral part is supplied by the [[lingual nerve]] (a branch of the mandibular branch (V3) of the [[trigeminal nerve]]) for somatosensory perception and by the [[chorda tympani]] (a branch of the [[facial nerve]]) for [[taste|taste perception]].

Both parts of the tongue develop from different [[pharyngeal arch]]es.