chiasm


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chiasm

 [ki´azm]
a decussation or X-shaped crossing.
optic chiasm a structure in the forebrain formed by the decussation of fibers of the optic nerve from each half of each retina.

chi·asm

(kī'azm),
1. An intersection or crossing of two lines.
2. In anatomy, a decussation or crossing of two fibrous bundles, such as tendons, nerves, or tracts.
3. In cytogenetics, the site at which two homologous chromosomes make contact (thus appearing to be crossed), enabling the exchange of genetic material during the prophase stage of meiosis.
Synonym(s): chiasma [TA]
[G. chiasma]

chiasm

/chi·asm/ (ki´azm) a decussation or X-shaped crossing.
optic chiasm  the structure in the forebrain formed by the decussation of the fibers of the optic nerve from each half of each retina.

chiasm

[kī′azəm]
Etymology: Gk, chiasma, lines that cross
1 the crossing of two lines or tracts, as of the optic nerves at the optic chiasm.
2 (in genetics) the crossing of two chromatids in the prophase of meiosis. chiasmal, chiasmic, adj.

chi·asm

(kīazm)
1. An intersection or crossing of two lines.
2. anatomy a decussation or crossing of two fibrous bundles, such as tendons, nerves, or tracts.
Synonym(s): chiasma.
3. cytogenetics the site at which two homologous chromosomes make contact (thus appearing to be crossed), enabling the exchange of genetic material during the prophase stage of meiosis.
Synonym(s): Budd syndrome.
[G. chiasma]

chi·asm

, chiasma (kīazm, kī-azmă)
In anatomy, decussation or crossing of two fibrous bundles, such as tendons, nerves, or tracts.
[G. chiasma]

chiasm

a decussation or Y-shaped crossing.

optic chiasm
a structure in the forebrain formed by the decussation of fibers of the optic nerve from each half of each retina.
References in periodicals archive ?
In this patient, due to adherence to the vital structures, such as cavernous sinus and optic chiasm, we could not resect the capsule of the tumor totally to avoid possible additional neurologic complications.
In Merleau-Ponty's posthumous essay titled, "The Intertwining--The Chiasm," he attempts--like current affect theory--to think past the Cartesian divide of mind from body, and of subjects from objects, by describing how our perceiving, perceptible, and materially sensible bodies form a chiasm or double-entwining
8) Maurice Merleau-Ponty, "The Intertwining--The Chiasm," in The Continental Aesthetics Reader, ed.
In our case, the aforementioned findings seen with posterior PFVS were present, as well as ipsilateral optic nerve and optic chiasm hypoplasia and an absent neurohypophysis.
The patient underwent transsphenoidal resection of the pituitary mass to decompress his chiasm and obtain pathology.
Initial imaging revealed a space-occupying, non-enhancing lesion in the optic chiasm.
And to extent that she occupies the language that can never belong to her, she functions as a chiasm with the vocabulary of political norms" (2000, 82).
This reciprocity is what Merleau-Ponty (1964) described as the crossing over of the touching and the touched, which he referred to as chiasm (the symbolic and / or actual place where the toucher and the touched meet at an interface of intermingling).
Moreover, to be patient means to perceive oneself as subject and object without no or minimal chiasm, to experience a more elevated reaction to the classical divide.
Because Merleau-Ponty's ontology stressed the embodied intertwining or chiasm of all organisms within the flesh of the world, his conception of animality is necessarily very different from Heidegger's.
The enemy's ox is here placed at the centre of the chiasm (a sort of poetic device) because enmity is at the heart of litigation.