Agnosia
Causes of
Symptoms of
- Prosopagnosia is the recognition of a familiar face with preserved subject recognition. Patients characterize the face, but can not determine to whom it belongs.(Sometimes they do not recognize themselves in the mirror.)
- Agnosia for colors is the inability to recognize colors or shades and determine whether a color matches a particular object.
- The weakness of optical representations is the disorder of creating an image of an object and highlighting its characteristics.
- Simultaneous agnosia - narrowing the field of view of one object( patients see only one subject and do not perceive others).
- Agnosia( a consequence of optic-motor disorders) is the inability to direct the view to the desired side with the preserved motor function of the eyeballs.
- Auditory agnosia is a form of agnosia, in which there is no recognition of a familiar sound while hearing is safe. Subtypes of agnosia: simple auditory( unrecognizable simple sounds), acoustical( speech is not recognized) and tonal( the tone is not recognized).
- Flavored agnosia is a disorder characterized by the unrecognized familiar taste. The taste sensitivity is not disturbed. The patient calls the food if he sees it, but is not able to determine it to taste.
- Olfactory agnosia is characterized by the inability to recognize a familiar smell with a preserved sense of smell. The patient describes the smell, but can not determine its source.
- Tactile agnosia is manifested as a failure to recognize a familiar object when feeling.
- One form of agnosia is somatoagnosis( a disorder of recognition of one's own body and its position in space).This process is a consequence of a violation of a large area of the right hemisphere. The patient does not recognize his arms, legs, fingers, etc., ignores half of the body( as well as individual limbs, including those functioning), or he can feel additional limbs( the disorder is called polimelia).This type can include imaginary sensations and pains of missing limbs, the lack of awareness of the patient's visual or auditory deficiency, or impairment of motor functions and many others. The main characteristic of this form of agnosia is the patient's conserved consciousness, which is aware of the absurdity of its sensations.
