Outlines of mental diseases, with seventeen illustrative engravings for the use of students / by Alexander Morison, M.D.

  • Morison, Alexander, 1779-1866.
Date:
[1829?]
Catalogue details

Licence: Public Domain Mark

Credit: Outlines of mental diseases, with seventeen illustrative engravings for the use of students / by Alexander Morison, M.D. Source: Wellcome Collection.

Provider: This material has been provided by University of Bristol Library. The original may be consulted at University of Bristol Library.

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    OF THE UNDERSTANDING. Intellectual phenomena may be viewed under two divisions : The First made known to us by the External Senses through the medium of Per- ception ; the Second by Consciousness. The external senses are the immediate instru- ments of sensation, by which ideas are excited in the mind, upon objects being presented to them. Consciousness is the operation of the mind, by which it perceives or feels what is passing within itself,—the feeling we have when we look inwards upon our minds. It appears to be peculiar to rational beings, and accompanies other mental operations. It is coeval with distinct perception, and is suspended during sleep, and certain dis- eases. Sensation is the change in the organs of sense occasioned by impressions acting upon their nerves. Perfection of sensation varies in different persons. It depends very much on the attention paid to the sensation. Extraordinary acuteness of sensation is unfavourable to distinct perception, and may lead to preponderance of particular ideas, and con-