C_S_D 4430 Lecture Notes - Lecture 46: Occipital Lobe, Supramarginal Gyrus, Parietal Lobe
Document Summary
Agnosia: a disorder of recognition due to cerebral injury. Classic theory places the lesion responsible for the disorder in the sensory association areas of the cerebral cortex, leaving primary sensory receptor areas intact. A surprisingly good ability to describe, copy, and match visual stimuli is maintained. Able to name the stimulus after it is presented wither tactilely or auditorily. Produced when visual association are lost due to a disconnect between the visual and language areas. Auditory agnosia typically refers to the inability to identify nonlinguistic auditory stimuli in the presence of normal hearing sensitively. This nonlinguistic version is typically caused by a lesion in auditory association cortex outside wernicke"s area. Pure word deafness refers to the complete inability to understand speech despite normal recognition of nonverbal auditory stimuli. This particular disorder is believed to be associated with a subcortical lesion of the temporal lobe that prevents wernicke"s area form receiving auditory stimulation.
