WordNet

the condition of being folded inward or sheathed (同)introversion
the folding in of an outer layer so as to form a pocket in the surface; "the invagination of the blastula" (同)introversion, intussusception, infolding
sheathe; "The chrysalis is invaginated"
fold inwards; "some organs can invaginate" (同)introvert

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/04/06 03:37:51」(JST)

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Invagination is the infolding of one part within another part of a structure,^[1] a folding that creates a pocket.^[2] The term, originally used in embryology, has been adopted in other disciplines as well.

Biology

Invagination is the morphogenetic processes by which an embryo takes form, and is the initial step of gastrulation,^[3] the massive reorganization of the embryo from a simple spherical ball of cells, the blastula, into a multi-layered organism, with differentiated germ layers: endoderm, mesoderm, and ectoderm. More localized invaginations also occur later in embryonic development,
The inner membrane of a mitochondrion invaginates to form cristae, thus providing a much greater surface area to accommodate the protein complexes and other participants that produce adenosine triphosphate (ATP).^[4]
Invagination occurs during endocytosis and exocytosis when a vesicle forms within the cell and the membrane closes around it.
Invagination of a part of the intestine into another part is called intussusception.^[5]

Humanities

The term is used to explain a special kind of metanarrative. It was first used by Maurice Merleau-Ponty^[6] (French: invagination) to describe the dynamic self-differentiation of the 'flesh'. It was later ised by Rosalind E. Krauss and Jacques Derrida ("The Law of Genre", Glyph 7, 1980); for Derrida, an invaginated text is a narrative that folds upon itself, "endlessly swapping outside for inside and thereby producing a structure en abyme".^[7] He applies the term to such texts as Immanuel Kant's Critique of Judgment^[7] and Maurice Blanchot's La Folie du Jour.^[8] Invagination is an aspect of différance, since according to Derrida it opens the "inside" to the "other" and denies both inside and outside a stable identity.^[2]

Geology

In geology, invagination is used to describe a deep depression of strata. Used by Donald L. Baars in "The Colorado Plateau".

References

^ "Medical Dictionary".
^ ^a ^b Wortham, Simon Morgan (2010). The Derrida Dictionary. Continuum International. p. 76. ISBN 9781847065261. Retrieved 12 January 2013.
^ Alberts (2002). Molecular Biology of the Cell. New York: Garland Science.
^ Cronk, Jeff. "Biochemistry Dictionary". [dead link]
^ Blanco, Felix. "Intussusception". Retrieved 1 November 2012.
^ Merleau-Ponty, Maurice (1968). The Visible and the Invisible. Boston, MA: Northwestern University Press. p. 152. ISBN 0810104571.
^ ^a ^b Chaplin, Susan (2004). Law, Sensibility, and the Sublime in Eighteenth-Century Women's Fiction: Speaking of Dread. Ashgate. p. 23. ISBN 9780754633068. Retrieved 12 January 2013.
^ Jones, Amelia (2003). The Feminism and Visual Culture Reader. Psychology Press. p. 200. ISBN 9780415267069. Retrieved 12 January 2013.

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English Journal

Increases in endothelial caveolin-1 and cavins correlate with cirrhosis progression.

Yokomori H1, Ando W2, Yoshimura K3, Yamazaki H4, Takahashi Y5, Oda M6.
Micron (Oxford, England : 1993).Micron.2015 Sep;76:52-61. doi: 10.1016/j.micron.2015.03.009. Epub 2015 Mar 31.
BACKGROUND AND AIMS: Caveolin-1 is associated with flat caveolar domains, invaginated smooth plasmalemmal vesicles, and caveolae. Polymerase 1 and transcript release factor (PTRF) (cavin 1) and serum deprivation protein response (SDPR) (cavin 2) are required for the invagination of caveolae, and PRK
PMID 26086560

Tooth germ invagination from cell-cell interaction: Working hypothesis on mechanical instability.

Takigawa-Imamura H1, Morita R2, Iwaki T3, Tsuji T2, Yoshikawa K4.
Journal of theoretical biology.J Theor Biol.2015 Jul 17. pii: S0022-5193(15)00335-5. doi: 10.1016/j.jtbi.2015.07.006. [Epub ahead of print]
In the early stage of tooth germ development, the bud of the dental epithelium is invaginated by the underlying mesenchyme, resulting in the formation of a cap-like folded shape. This bud-to-cap transition plays a critical role in determining the steric design of the tooth. The epithelial-mesenchyma
PMID 26188369

COMPARISON OF THE RADIOGRAPHIC AND TRACHEOSCOPIC APPEARANCE OF THE DORSAL TRACHEAL MEMBRANE IN LARGE AND SMALL BREED DOGS.

Lindl Bylicki BJ1, Johnson LR2, Pollard RE3.
Veterinary radiology & ultrasound : the official journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association.Vet Radiol Ultrasound.2015 Jul 14. doi: 10.1111/vru.12276. [Epub ahead of print]
The etiology and clinical significance of increased radiographic opacity along the dorsal margin of the tracheal lumen has long been debated. Most often, this opacity is attributed to redundancy of the dorsal tracheal membrane (DTM), a condition that occurs with tracheal collapse. We hypothesized th
PMID 26173473

Japanese Journal

臨床背側天蓋状骨片または関節内嵌頓骨片を伴った橈骨遠位端骨折の検討

森谷史朗,？田真一,前原孝 [他]
整形・災害外科 55(12), 1573-1579, 2012-11
NAID 40019480426

Transmesenteric hernia due to double-loop formation in the small intestine: a fatal case involving a toddler.

Kakimoto Yu,Abiru Hitoshi,Kotani Hirokazu,Ozeki Munetaka,Tsuruyama Tatsuaki,Tamaki Keiji
Forensic science international 214(1-3), e39-e42, 2012-01-10
… The girl's mild abdominal pain was likely induced by herniation and formation of the first intestinal loop, followed by severe shock occurring when the subsequent intestinal segment invaginated into the same defect forming the second loop on the opposite side of the mesentery. …
NAID 120003779169

Early Morphological Changes of Hereditary Cerebellar Cortical Abiotrophy in Rabbits

SATO Junko,SASAKI Satoshi,YAMADA Naoaki,TSUCHITANI Minoru
Journal of Veterinary Medical Science, 2012
… The affected rabbit showed apoptotic granular cells before and after migration completion, degeneration (swelling) of parallel fiber terminals, abnormal junction (invaginated junction) of the parallel fiber-Purkinje cell synapses and irregular orientation of the Purkinje dendritic arbor in the molecular layer. …
NAID 130002502191