from The Century Dictionary.
- noun A state of unusually heightened or intensified coloration, as that of melanism or erythrism, in an animal.
from the GNU version of the Collaborative International Dictionary of English.
- noun The condition of having an unusual intensity of color.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun An
abnormal intensityof colour.
from Wiktionary, Creative Commons Attribution/Share-Alike License
In brief, the agencies that in our brain-cell studies were found to cause hyperchromatism followed by chromatolysis gave positive results in the Cannon test for adrenalin (Fig. 62).
The injection of adrenalin causes striking brain-cell changes: first, a hyperchromatism, then a chromatolysis.
B: Section of Cerebellum of Dog Showing the Effect of the Brain-cells of Iodoform Poisoning (x310). a increased mental tone; while the brain-cells accurately display these physiologic alterations in proportional hyperchromatism in the active stages, and proportional chromatolysis in the stages of reaction.
An animal, both of whose adrenals had been excised, showed no hyperchromatism in the brain-cells after the injection of strychnin, toxins, foreign proteins, etc.
-- Our experiments have shown that the brain-cell changes due to fear may be divided into two stages: First, that of hyperchromatism -- stimulation; second, that of hypochromatism -- exhaustion (Figs. 5 and 13).
Adrenalin alone causes hyperchromatism followed by chromatolysis, and in overdosage causes the destruction of some brain-cells.
Histologic examinations of the brains of both dogs showed marked hyperchromatism in the brain receiving adrenalin, while the brain receiving no adrenalin showed no change.
[d] The protective effect of the alkali is strikingly shown by the general hyperchromatism.
[d] The remarkable activating effect of adrenalin is strikingly shown by teh intense hyperchromatism.