Charles Bonnet

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Bonnet, Charles

(shärl bônā`), 1720–93, Swiss naturalist and philosopher. He drew attention to parthenogenesisparthenogenesis
[Gr.,=virgin birth], in biology, a form of reproduction in which the ovum develops into a new individual without fertilization. Natural parthenogenesis has been observed in many lower animals (it is characteristic of the rotifers), especially insects, e.g.
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 in aphids, but his theories were highly fanciful and unscientific. His books include Traité d'insectologie (1745) and Contemplation de la nature (1764–65).

Bonnet, Charles


Born Mar. 13, 1720, in Geneva; died May 20, 1793, in Geneva. Swiss naturalist and philosopher.

In 1745, in his Treatise on Insects, Bonnet described an-thropoda, polyps, and worms and related new data on the life and instincts of insects. He was one of the first to describe parthenogenesis in plant lice. He observed the process of regeneration in worms, hydras, starfish, snails, crayfish, and amphibians; he expressed the correct hypothesis that regeneration is, in some species of animals, one of the forms of adaptation to the hostile influences of the external environment.

In 1754, in his work An Investigation of the Role of Leaves in Plants, Bonnet tried to explain the physiological functions of the leaf and the movement of plant fluids. In his works Discourse on Organized Bodies (volumes 1–2, 1762), Contemplation of Nature (volumes 1–2, 1764), and Philosophical Palingenesis (volumes 1–2, 1769), Bonnet emerged as a resolute opponent of the theory of spontaneous generation of microorganisms and as a supporter of the theory of preformation. Bonnet was among the authors of studies on the “ladder of beings,” according to which all inorganic bodies and living organisms are distributed in a certain order, from the simplest to the most complex, including man, and extending further to include supernatural beings—angels, archangels, and so on. In questions of epis-temology, Bonnet considered experience and empirics very important, although he also pointed out that human capabilities of perceiving the world are limited.


Lunkevich, V. V. Ot Geraklita do Darvina, 2nd ed., vol. 2. Moscow, 1960. Pages 65–75.
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Her condition has also triggered Charles Bonnet Syndrome where the brain tries to replace the images it thinks are missing.
The first of two volumes on the topic, this volume brings together 13 articles on neuropsychiatric syndromes that lie between the fields of neurology and psychiatry, such as minor hemisphere syndromes; body representation disorders; misoplegia; pali and echo phenomena; pathological yawning, laughing, and crying; catastrophe reaction and emotionalism; non-drug addictive and obsessive-compulsive symptoms after focal brain lesions; hypersexuality in neurological disorders; the KlEver-Bucy syndrome; Diogenes syndrome; segmental craniocervical dystonia; REM sleep behavior disorder; and Charles Bonnet syndrome and other hallucinatory phenomena.
43) Except in definite cases of Charles Bonnet syndrome (CBS; see below), patients experiencing hallucinations should be referred for further assessment.
It's a condition known as Charles Bonnet Syndrome (CBS).
html) Live Science , Charles Bonnet syndrome gives people "vivid, complex visual hallucinations," commonly faces, cartoons and patterns.
This phenomenon named as Charles Bonnet Syndrome (CBS) in 1936 by Georges de Morsier, a neurologist after the name of a Swiss philosopher, naturalist, biologist and writer Charles Bonnet who wrote about his elderly grandfather's experiences of phantom vision in 1796.
In addition, MES is suggested to be a variant of Charles Bonnet syndrome (visual hallucinations in visually impaired patients) by some authors (I).
Known as Charles Bonnet syndrome, these are a reaction of the brain to the loss of eyesight.
In addition to several medical causes for this presentation (Table 1), consider Charles Bonnet syndrome in patients with visual loss, presenting as visual hallucinations with intact insight and absence of a mental illness.
Kath said: "He had nightmares and suffered from Charles Bonnet syndrome, which is common for people who have lost their sight and causes hallucinations.
Charles Bonnet syndrome is a condition characterised by the presence of visual hallucinations in patients having visual impairment most commonly reported in the seventh decade.