In 1798, Alexander Crichton, a Scottish physician, published a two-volume text on mental derangements. Among other things, he discussed various disorders of fluent speech, citing his own cases and those of others. These disorders ranged from simple word-finding difficulties to Wernicke's aphasia. Crichton interpreted these disorders by turning to the principles of association laid down by Aristotle and developed by Hume, Locke, Condillac, and others. Crichton was an imaginative and creative thinker who, like Johann Gesner, helped to provide a fertile intellectual soil for the development of later associationistic (connectionistic) models of higher brain function.
Finger S, Buckingham HW. Alexander Crichton (1763-1856): Disorders of Fluent Speech and Associationist Theory. Arch Neurol. 1994;51(5):498–503. doi:10.1001/archneur.1994.00540170078019
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