Chiasma

In this early poem – the first one in his Selected Poems – Heaney uses a rhetoric figure that for a considerable period would be his trademark: the 'chiasma', or crossing of themes. ❋ Unknown (2007)

Because the optic chiasma had been cut, using their left eye they were unaware of the left half of the field of view of the screen the virtual image is reversed. ❋ Unknown (2009)

Shakespeare's is an interesting line, but a good chiasma is a literary firework -- an "OH!" moment -- and Bill Clinton's delivered a great one Wednesday night: ❋ Unknown (2008)

Finally, one of my favorite poetic and rhetorical tricks is the chiasma. ❋ Unknown (2008)

ANS is largely under hypothalamic control which is situated very close to optic chiasma sixth chakra or ajna chakra. ❋ Blue Tyson (2008)

[1890] He impressed him as a chiasma, i.e., in the form of the letter ch upon the universe. ❋ 1819-1893 (2001)

A chiasma so located starts its terminalization process to reach the end of the arm. ❋ Unknown (1983)

It is enough to induce chromosome breakage should the terminalization process be blocked before the terminalizing chiasma reaches the end of the arm of a chromosome. ❋ Unknown (1983)

The fibers thus form an X shape; and the structure is the optic chiasma (ky~az'muh), because the Greek letter "chi" looks like our X (see illustration, p. 274). ❋ Asimov, Isaac (1963)

—This is a somewhat lozenge-shaped area of the base of the brain, limited in front by the optic chiasma, behind by the antero-superior surface of the pons, antero-laterally by the converging optic tracts, and postero-laterally by the diverging cerebral peduncles. ❋ Unknown (1918)

Optic Chiasma (chiasma opticum; optic commissure). ❋ Unknown (1918)

—The optic chiasma is a flattened, somewhat quadrilateral band of fibers, situated at the junction of the floor and anterior wall of the third ventricle. ❋ Unknown (1918)

—The optic tracts are continued backward and lateralward from the postero-lateral angles of the optic chiasma. ❋ Unknown (1918)

In front, the cisterna interpeduncularis extends forward across the optic chiasma, forming the cisterna chiasmatis, and on to the upper surface of the corpus callosum, for the arachnoid stretches across from one cerebral hemisphere to the other immediately beneath the free border of the falx cerebri, and thus leaves a space in which the anterior cerebral arteries are contained. ❋ Unknown (1918)

Most of its fibers have their origins in the retina, and reach the chiasma through the optic nerves, which are continuous with its antero-lateral angles. ❋ Unknown (1918)

Behind the chiasma the fibers grow backward as the optic tracts to the thalami and mid-brain. ❋ Unknown (1918)

The optic chiasma is formed by the meeting and partial decussation of the fibers of the two optic nerves. ❋ Unknown (1918)

The parts of the brain included within this arterial circle are the lamina terminalis, the optic chiasma, the infundibulum, the tuber cinereum, the corpora mammillaria, and the posterior perforated substance. ❋ Unknown (1918)

This blindness is due to the pressure of the enlarging hypophysis on the optic chiasma (Fig. 1180). ❋ Unknown (1918)

This surface is bounded behind by a ridge, which forms the anterior border of a narrow, transverse groove, the chiasmatic groove (optic groove), above and behind which lies the optic chiasma; the groove ends on either side in the optic foramen, which transmits the optic nerve and ophthalmic artery into the orbital cavity. ❋ Unknown (1918)