Loss of recognition and loss of naming are two different psychological disorders. The inability to name does not mean the inability to cognize, the ability to name only loss of recognition is a clinical symptom of inability to recognize body parts and familiar objects through organs in the absence of sensory insufficiency, mental decline, confusion, and inattention. It includes visual, auditory, tactile and body part recognition deficits. What are the symptoms that are easily confused with it? Indicates a part of cognition. Patients with anosognosia are unable to name objects, describe their uses, demonstrate how to use them, and perform object-to-object matching tests, while patients with anosognosia are able to correctly perform the use of objects and the above-mentioned test methods, except for the inability to name them, so the two need to be distinguished. Careful examination often shows that some abnormalities are caused by other aspects, including: 1. genuine unfamiliarity with the stimulus content 2. Inability to differentiate due to poor vision. 3, Posterior parietal lesions caused by cardiac arrest, tumor, or infection may impair the brain’s control of precise eye movements, the latter involving the actual finding of a picture or other complex visual stimulus; in addition to joint eye movements, the resulting disorganization prevents the patient from naming or interacting appropriately with the stimulus. 4. The inability to complete instructions correctly may also be caused by a speech disorder or an application disorder; errors caused by speech disorders are easily understood, while application disorders may be more difficult to recognize. Sometimes, it is not clear whether the disorder of use produces a loss of recognition or the loss of recognition produces a disorder of use. 5. Poor instruction by the examiner or neglect of end-organ dysfunction (e.g., peripheral neuropathy, otosclerosis, cataracts).