APRAXIA
\ɐpɹˈe͡ɪksi͡ə], \ɐpɹˈeɪksiə], \ɐ_p_ɹ_ˈeɪ_k_s_iə]\
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A group of cognitive disorders characterized by the inability to perform previously learned skills that cannot be attributed to deficits of motor or sensory function. The two major subtypes of this condition are ideomotor (see APRAXIA, IDEOMOTOR) and ideational apraxia, which refers to loss of the ability to mentally formulate the processes involved with performing an action. For example, dressing apraxia may result from an inability to mentally formulate the act of placing clothes on the body. Apraxias are generally associated with lesions of the dominant PARIETAL LOBE and supramarginal gyrus. (From Adams et al., Principles of Neurology, 6th ed, pp56-7)
By DataStellar Co., Ltd
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A condition in which, without loss of mental power, a person can not understand the nature of objects that he perceives by his senses. Thus in Visual a. he does not recognize a familiar object, although he sees it (Mind-blindness, Word-blindness); in Auditory a. he attaches no meaning to familiar sounds, although he hears them (Mind-deafness, Word-deafness) ; and in Psychic anasthesia Psychic anosmia, and Psychic ageusia, he fails to appreciate the nature of familiar objects that he handles, smells, or tastes.
By Alexander Duane
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Insane performance of preposterous acts.
By Willam Alexander Newman Dorland
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Loss of the power of communication by signs, also of knowledge of the uses of objects; object blindness. Inability or awkwardness in performance of intentional muscular movement. General term for loss of power of expressing or effecting ideas of muscular movements of any kind. [Gr.]
By Smith Ely Jelliffe
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Dopamine Acetyltransferase
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