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Frontonasal prominence

Frontonasal prominence

Under surface of the head of a human embryo about twenty-nine days old. (Frontonasal process labeled at center left.)

Details

Identifiers

Latin
prominentia frontonasalis

Code
TE E5.3.0.0.0.0.6

Anatomical terminology
[edit on Wikidata]

During the third week of embryonic development, two areas of thickened ectoderm, the olfactory areas, appear immediately under the fore-brain in the anterior wall of the stomodeum, one on either side of a region termed the frontonasal prominence (or process).
By the upgrowth of the surrounding parts these areas are converted into pits, the olfactory pits, which indent the frontonasal prominence and divide it into a medial and two lateral nasal processes.
There is some evidence that development involves Sonic hedgehog and Fibroblast growth factor 8.[1]
References[edit]
This article incorporates text in the public domain from the 20th edition of Gray’s Anatomy (1918)

^ Abzhanov A, Cordero DR, Sen J, Tabin CJ, Helms JA (December 2007). “Cross-regulatory interactions between Fgf8 and Shh in the avian frontonasal prominence”. Congenit Anom (Kyoto). 47 (4): 136–48. doi:10.1111/j.1741-4520.2007.00162.x. PMID 17988255. 

External links[edit]

hednk-027—Embryo Images at University of North Carolina
Flash animation at indiana.edu
ent/30 at eMedicine

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Development of the head and neck

Face

Nasal placode
Nasal pit
Nasal prominences

Lateral
Medial

Intermaxillary segment
Frontonasal prominence
Maxillary prominence
Mandibular prominence

Meckel’s cartilage

Mouth

Palate

Primary palate
Secondary palate

Tongue

Lateral lingual swelling
Tuberculum impar
Copula linguae
Hypopharyngeal eminence
Gustatory placode

General

Pharyngeal apparatus
Pharyngeal groove

Cervical sinus

Pharyngeal arch
Pharyngeal pouch

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