Agnosia

Agnosia is the inability to recognize an object by using one or more sensory systems. The diagnosis is made clinically, often also includes neuropsychological tests. To identify the cause of an imaging of the brain (eg. As CT, MRI) is initiated. The prognosis depends on the type and extent of damage and the age of the patient. There is no specific treatment, but language and occupational therapy can help patients to compensate for the disturbance.

Agnosia are rare. They result from an injury (eg., By infarction, tumor, abscess or trauma) or degeneration of brain areas that perception, memory and recognition integrated (eg., Alzheimer’s disease, Parkinson’s disease).

Agnosia is the inability to recognize an object by using one or more sensory systems. The diagnosis is made clinically, often also includes neuropsychological tests. To identify the cause of an imaging of the brain (eg. As CT, MRI) is initiated. The prognosis depends on the type and extent of damage and the age of the patient. There is no specific treatment, but language and occupational therapy can help patients to compensate for the disturbance. Agnosia are rare. They result from an injury (eg., By infarction, tumor, abscess or trauma) or degeneration of brain areas that perception, memory and recognition integrated (eg., Alzheimer’s disease, Parkinson’s disease). Various forms of brain lesions can cause various forms of agnosia, which may include any sensory modality. Usually only one Sinnesmodaltiät is affected. Examples are: listening (auditory agnosia Inability, objects to be identified by noises such as a ringing phone), taste (gustatory agnosia), smell (olfactory agnosia), touch (tactile agnosia) and vision (visual agnosia). Other forms of agnosia relating to very specific and complex processes within a sensory modality. Prosopagnosia is the inability of the recognition of well-known faces, and faces good friend, or else to distinguish individual objects within a class of objects, although the ability to identify common features of faces and objects is maintained. Anosognosia can occur with violations of the right non-dominant parietal lobe (which usually arises because of an acute stroke or traumatic brain injury). It may be that patients are fully aware with multiple impairments an impairment, but not another. Patients with Ansognosie deny their motor deficits, insist that they lack nothing, even if one side of her body is completely paralyzed. If you the paralyzed part of the body is shown, patients can deny that he is one of them. In connection therewith, it is frequently observed that the patients the motor or paralyzed sensitive part of the body ignore (Hemiunaufmerksamkeit) or the space around them on this side do not perceive (hemineglect). The hemineglect usually affects the left side of the body. Lesions in the parietal lobe can cause somatosensory agnosia. Patients with somatosensory agnosia it difficult to identify a known object (eg. B.Schlüssel, safety pin) which is placed in the hand on the opposite side of the body with the damage. However, they can, if they look at the object, recognize this immediately and identify it. Occipitotemporale lesions can lead to an inability to familiar places (environmental agnosia) to recognize, blurred vision (visual Angosie) color blindness (achromatopsia) Right-sided temporal lesions can result in the following, an inability sounds (auditory agnosia) to interpret Impaired music perception (amusia) diagnostic tests at the bedside and neuropsychological tests brain imaging at the bedside, patients are asked to identify common objects visually or by touch or a different meaning. In V. a. Hemineglect, patients are asked to identify the paralyzed part of the body or objects in this part of the visual field. The physical examination is performed to determine primary deficits of individual sense or the ability to communicate, which can interfere with agnosia tests. For example, patients can in impaired light touch an object does not feel, even if the cortical function is intact. Also aphasia can overlay the utterance of the patient. A detailed neuropsychological testing can identify discrete pronounced agnostic phenomena. Imaging of the brain (eg. As CT or MRI, with or without angiographic sequences) is used to characterize a central lesion (z. B. infarct, hemorrhage, mass) is necessary. Also necessary to look for atrophy, which would suggest a degenerative cause of the malfunction. Outlook The recovery from an agnosia can be influenced by the type, size and location of lesions degree of impairment patients age, the effectiveness of the therapy The majority of the improvement occurs within the first 3 months, but it may in varying degrees until a year after the go on damage. Treatment treatment of the cause speech or occupational therapy, when possible, is the cause of agnosia treated (for. Example, surgery and / or antibiotics in brain abscess, opration and / or radiotherapy for brain tumor). Rehabilitation with speech therapists and occupational therapists can help patients learn to compensate for their deficits. Important points agnosias are rare, but can affect any perception. Agnosias be diagnosed by the patient is asked to identify objects or – with subtle agnosias – by neuropsychological tests are performed. Brain imaging to characterize the causative lesion. Recommend rehabilitation with speech therapy and occupational therapy to help patients learn to compensate for their deficits.

Health Life Media Team

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