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This book discusses in detail the pathology of loss of ability to appreciate objects or things by means of feeling or touching (astereognosis). All the work was done in the neurologic clinic of Salpêtrière under the supervision of George Guillain and in the laboratory of physiology of sensations in the College of France under the supervision of H. Pieron. Delay includes three syndromes in his study of astereognosis. They are (1) l'amorphognosie, (2) l'ahylognosie and (3) l'asymbolic tactile. L'amorphognosie is a term given to that condition in which there is an inability to appreciate the form, length and spatial qualities of an object. L'ahylognosie refers to inability to appreciate the density, thermic conductivity, rugosity and molecular qualities of an object. The asymbolie tactile is the inability to appreciate the species or use of an object. The book is divided into six parts. The first part is further sub-divided into three
Les astéréognosies: Pathologie du toucher. Clinique, physiologie, topographie. JAMA. 1936;106(9):732. doi:10.1001/jama.1936.02770090068030
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