Circumvallate papillae

Circumvallate papillae

Infobox Anatomy
Name = PAGENAME
Latin = papillae vallatae, circumvallate papillae
GraySubject = 242
GrayPage = 1126


Caption = Circumvallate papilla in vertical section, showing arrangement of the taste-buds and nerves.


Caption2 = Tongue
System =
Precursor =
MeshName =
MeshNumber =
DorlandsPre = p_03
DorlandsSuf = 12610570
The circumvallate papillae (or vallate papillae) are of large size (dome-shaped structures), and vary from eight to twelve in number.

They are situated on the dorsum of the tongue immediately in front of the foramen cecum and sulcus terminalis, forming a row on either side; the two rows run backward and medially, and meet in the midline, like the limbs of the letter V inverted.

Each consists of a projection of mucous membrane from 1 to 2 mm. wide, attached to the bottom of a circular depression of the mucous membrane (some text referred to as moats); the margin of the depression is elevated to form a wall (vallum), and between this and the papilla is a circular sulcus termed the fossa.

The papilla is shaped like a truncated cone, the smaller end being directed downward and attached to the tongue, the broader part or base projecting a little above the surface of the tongue and being studded with numerous small secondary papillæ and covered by stratified squamous epithelium.

Ducts of lingual salivary glands, referred to as Von Ebner's glands empty serous secretion into the base of the circular depression (moats). The function of the secretion is presumed to flush materials from the base of circular depression to ensure that taste buds can respond to changing stimuli rapidly. (Michael H. Ross, Histology: A text and alas 5th edition)

The circumvallate papillae get SVA innervation from cranial nerve IX, the glossopharyngeal nerve, even though they are anterior to the sulcus terminalis. The rest of the anterior 2/3s of the tongue gets SVA innervation from the chorda tympani of cranial nerve VII, distributed with the lingual nerve of cranial nerve V.


=Additional

External links

* [http://ssg.fst.ohio-state.edu/Extension/Anat.asp Overview and diagram at ohio-state.edu]
*


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Look at other dictionaries:

  • circumvallate papillae — papillae vallatae …   Medical dictionary

  • circumvallate papilla — n any of approximately 12 large papillae near the back of the tongue each of which is surrounded with a marginal sulcus and supplied with taste buds responsive esp. to bitter flavors called also vallate papilla …   Medical dictionary

  • circumvallate — Denoting a structure surrounded by a wall, as the c. (vallate) papillae of the tongue. [circum + L. vallum, wall] * * * cir·cum·val·late .sər kəm val .āt, val ət adj enclosed by a ridge of tissue * * * cir·cum·val·late (sur″kəm… …   Medical dictionary

  • circumvallate — I. transitive verb ( lated; lating) Etymology: Latin circumvallatus, past participle of circumvallare to surround with siege works, from circum + vallum rampart more at wall Date: circa 1798 to surround by or as if by a rampart • circumvallation… …   New Collegiate Dictionary

  • circumvallate — [ˌsə:kəm valeɪt] verb literary surround with or as if with a rampart. adjective 1》 literary surrounded or surrounding as if by a rampart. 2》 Anatomy denoting papillae near the back of the tongue, surrounded by taste receptors. Origin C17: from L …   English new terms dictionary

  • circumvallate papilla — noun : any of approximately 12 large papillae each surrounded with a marginal sulcus and richly supplied with taste buds chiefly responsive to bitter flavors and arranged in a V shaped row near the back of the tongue called also vallate papilla …   Useful english dictionary

  • papilla — Any small, nipplelike process. SYN: teat (3). [L. a nipple, dim. of papula, a pimple] acoustic p. SYN: spiral organ. basilar p. the auditory sense organ of birds, amphibians, and reptiles; homologous to the …   Medical dictionary

  • Vallate papilla — For other papillae in the tongue, see Papilla (disambiguation). Vallate papilla Circumvallate papilla in vertical section, showing arrangement of the taste buds and nerves …   Wikipedia

  • Tongue — Infobox Anatomy | Name = Tongue Latin = lingua GraySubject = 242 GrayPage = 1125 Caption = A human tongue Caption2 = Width = 250 |fjhfkdvhbufnbjg Precursor = pharyngeal arches, lateral lingual swelling, tuberculum impar [EmbryologyUNC|hednk|024]… …   Wikipedia

  • Filiform papilla — A filiform papilla. Magnified. Semidiagrammatic view of a portion of the mucous membrane of the tongue. Two fu …   Wikipedia

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