Otic placode

Otic placode
Otic placode
Latin placoda otica
Code TE E5.15.2.0.0.0.4

In embryology, the otic placode is a thickening of the ectoderm on the outer surface of a developing embryo from which the ear develops. The ear, including both the vestibular system and the auditory system, develops from the otic placode beginning the third week of development. During the fourth week, the otic placode invaginates into the mesenchyme adjacent to the rhombencephalon to form the otic pit, which then pinches off from the surface ectoderm to form the otic vesicle.[1]

See also

References

  1. ^ http://download.videohelp.com/vitualis/med/Ear_Devt.html
v · d · ePrenatal development/Mammalian development of nervous system (GA 9.733 and GA 10.1002, TE E5.13-16)
Neurogenesis
Cranial neural crest (Cardiac neural crest complex) · Truncal neural crest
Eye development
Auditory development
Otic placode (Otic pit, Otic vesicle)
note: NS is mostly ectoderm, but mesoderm is precursor for epineurium, perineurium, and endoneurium

M: CNS

anat(n/s/m/p/4/e/b/d/c/a/f/l/g)/phys/devp

noco(m/d/e/h/v/s)/cong/tumr, sysi/epon, injr

proc, drug(N1A/2AB/C/3/4/7A/B/C/D)

M: EYE

anat(g/a/p)/phys/devp/prot

noco/cong/tumr, epon

proc, drug(S1A/1E/1F/1L)

M: EAR

anat(e/p)/phys/devp

noco/cong, epon

proc, drug(S2)

Wikimedia Foundation. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • otic placode — n AUDITORY PLACODE * * * a thickened ectodermal plate located midway alongside the hindbrain in the early embryo, from which the internal ear ultimately develops. Called also auditory p …   Medical dictionary

  • Otic pit — Section through the head of a human embryo, at the beginning of the fourth week, in the region of the hind brain. Latin fovea otica Gray s …   Wikipedia

  • Otic vesicle — Embryo between eighteen and twenty one days …   Wikipedia

  • otic pit — n AUDITORY PIT * * * a distinct depression appearing in each otic placode, marking the beginning of embryonic development of the internal ear. Called also auditory p. and otic depression …   Medical dictionary

  • Placode — A placode is an area of thickening in the embryonic epithelial layer where some organ or structure later develops. The term usually refers to cranial placodes, peripheral nervous system structures associated with the special senses and cranial… …   Wikipedia

  • placode — Local thickening in the embryonic ectoderm layer; the cells of the p. ordinarily constitute a primordial group from which a sense organ or ganglion develops. [G. plakodes, fr. plax, anything flat or broad, + eidos, like] auditory placodes SYN:… …   Medical dictionary

  • auditory placode — n either of the anterior lateral areas of ectoderm that invaginate and sink beneath the body surface to form the inner ear structures of vertebrate embryos called also otic placode * * * otic p …   Medical dictionary

  • auditory saucer — otic placode …   Medical dictionary

  • Embryology — 1 morula, 2 blastula 1 blastula, 2 gastrula with blastopor …   Wikipedia

  • Neurogenic placodes — Latin placodae neurogenicae Code TE E05.15.2.0.0.0.1 A neurogenic placode is an area of thickening in the embryonic epithelial layer where some organ or structure later develops. The term usually refers to cranial placodes, peripheral nervous… …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”