What's going on with visual agnosia?

summary

Visual agnosia refers to patients can no longer rely on vision to recognize or recognize things that were not difficult to recognize before. This kind of visual agnosia is not caused by vision problems, and has nothing to do with the patient's intelligence. What's going on with visual agnosia? Let's talk about it

What's going on with visual agnosia?

The pathogenesis of cognitive activity is completed by different regions of the brain. Occipital lobe is the center of visual cortex, which is mainly related to visual perception and memory. The main causes of agnosia are intracranial tumor, cerebrovascular disease and craniocerebral trauma.

The visual, auditory and somatosensory areas of the brain in the primary sensory area are stimulated by different stimuli, which can lead to abnormal visual appearance such as flash, spark and color change, abnormal sound such as "silk", "rustle" and "rumble", numbness of limbs, needling and tactile sensation, The destruction of the primary sensory area prevents the afferent impulses from producing sensation in the brain.

Simultaneous agnosia is generally recognized clinically as a manifestation of Balin's syndrome. Balin's syndrome is a kind of clinical neurological disorder, which usually includes three aspects of disorders: visual pointing disorder; Visual dyskinesia; Visual attention disorder, in which visual attention disorder is simultaneous agnosia. Patients can recognize individual objects and characters in a picture or scene, but they can't recognize the whole picture or scene correctly.

matters needing attention

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