PSYC 311 Chapter Notes - Chapter 16: Occipital Lobe, Achromatopsia, Hemianopsia
23 Feb 2017
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The patient with visual agnosia does not respond appropriately to visually presented material even though visual sensory processing, language, and general intellectual functions are preserved at sufficient levels. Poor recognition is usually limited to the visual modality, and appropriate responses occur when the patient is allowed to handle the object or hear it in use. Visual agnosias have been classified according to the specific category of visual material that cannot be recognized --> impairment in recognition of faces, colors, or objects, etc. , all have different names. They are found in isolation or in various combinations in the clinical population. Bay (1953) believed that specific cases of agnosia were just disorders of primary sensory function due to lesions of the primary sensory fields or their connections. However, bay"s findings cannot be generalized to all agnosics. Patient fails to name object but can indicate visual recognition by other means (they can describe it, gesture it, etc)
