perceptual defect

perceptual defect

any of a broad group of disorders or dysfunctions of the central nervous system that interfere with the conscious mental recognition of sensory stimuli. Such conditions are caused by lesions at specific sites in the cerebral cortex that may result from any illness or trauma affecting the brain at any age or stage of development. Impairment of mental activity, cognitive processes, and emotional responses may be diffuse, as occurs in organic mental disorders, such as the psychoses, delirium, and dementia, and in attention deficit disorder, or they may be manifested focally, as in aphasia, apraxia, epilepsy, disorders of memory, cerebrovascular disorders, and various intercranial neoplasms.
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11 What is the clinical name for the perceptual defect produced by damage to FFA in Image D?
Table 1 General symptoms resulting from stroke * Headaches * Mental confusion, disorientation and memory deficits * Aphasia * Agnosia * Apraxia * Seizures * Vertigo * Dysarthria * Incontinence * Hemiplegia or hemiparesis * Perceptual defects Table 2 Common vision impairments resulting from stroke * Strabismus * Gaze palsy * Nystagmus * Diplopia * Lagophthalmos * Dry eye * Visual acuity reduction * Visual field defects * Unilateral neglect * Visual midline shift * Visual agnosia * Cortical blindness * Photophobia * Contrast sensitivity impairment * Visual hallucinations * Light and dark adaptation impairment
Right temporal lobe damage most commonly results in impairments of visual learning and memory, but it can also result in impairments in visio-spatial perceptual defects.