When an object is placed in the hand of a patient with neurologic impairment during assessment, the patient is unable to recognize the placement. This is termed tactile
a. homonymous hemianopsia. c. agnosia.
b. aphasia d. apraxia.
C
Agnosia is a disturbance in the perception of familiar sensory (e.g., verbal, tactile, visual) information. Unilateral neglect is a form of agnosia characterized by an unawareness or denial of the affected half of the body. Tactile agnosia is a perceptual disorder in which a patient is unable to recognize an object that has been placed in his or her hand by touch alone. Lesions in the parietal lobe and in other cortical structures can result in apraxia, an inability to perform a learned movement voluntarily. Optic radiations extend back to the occipital lobes. Visual defects restricted to a single field, right or left, are called homonymous hemianopsia. Aphasia is a loss of language abilities caused by brain injury, usually to the dominant hemisphere.
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