invagination

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Related to basilar invagination: Chamberlain line, platybasia, os odontoideum

invagination

 [in-vag″ĭ-na´shun]
1. the infolding of one part within another part of a structure, as of the blastula during gastrulation.
basilar invagination a developmental deformity of the occipital bone and upper end of the cervical spine in which the latter appears to have pushed the floor of the occipital bone upward; see also platybasia. Called also basilar impression.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

in·vag·i·na·tion

(in-vaj'i-nā'shŭn),
1. The ensheathing, enfolding, or insertion of a structure within itself or another.
See also: introversion, intussusception.
2. The state of being invaginated.
See also: introversion, intussusception.
Farlex Partner Medical Dictionary © Farlex 2012

invagination

(ĭn-văj′ə-nā′shən)
n.
1. The act or process of invaginating or the condition of being invaginated.
2. An invaginated organ or part.
3. Embryology The infolding of a portion of the outer layer of a blastula in the formation of a gastrula.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

in·vag·i·na·tion

(in-vaj'i-nā'shŭn)
1. The ensheathing, enfolding, or insertion of a structure within itself or another.
2. The state of being invaginated.
See also: introversion, intussusception
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

invagination

A folding into or ensheathing. The process of invagination occurs in the early development of the embryo when part of the BLASTODERM folds inward so that the hollow sphere becomes cup-shaped and double-walled.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

invagination

an inpushing of a layer of cells, as in GASTRULATION or in the formation of the PROCTODAEUM.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

in·vag·i·na·tion

(in-vaj'i-nā'shŭn)
Ensheathing, enfolding, or insertion of a structure within itself or another.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Basilar invagination is a prolapse of the vertebral column into the skull base.
These anomalies include cervical spina bifida occulta, cervical scoliosis, Klippel-Feil deformity, atlantoaxial assimilation, atlantooccipital fusion, and basilar invagination. They suggest that given this association the etiologies of NTS and Chiari-1 malformations are probably the same, namely, developmental variation along a spectrum of severity common to the base of the skull and upper cervical spine.