What is parietal lobe dysfunction?

Parietal lobe dysfunction can cause lesions, and even patients will experience perceptual disorders, neurological lesions, and symptoms of ataxia. The patient's cognitive behavioral senses will also be lesions. Therefore, in judging this parietal lobe function, each person's performance characteristics are different, and it is necessary to control and prevent it in a timely manner in normal times, and pay attention to personal care.

Parietal lobe lesions

1. Sensory impairment:

The parietal lobe is the cortical sensory center. Irritative lesions in the postcentral gyrus cause contralateral focal sensory epilepsy or paresthesia, and destructive lesions lead to contralateral hemisensory disorders, but most of them are incomplete hemisensory disorders, accompanied by hypotonia and sensory ataxia.

(ii) Complex feelings:

Lesions in the superior parietal lobule cause complex sensory disturbances on the contralateral side, including two-point discrimination, solid sense, skin orientation sense, and pattern sense. There may be spontaneous pain, tactile retention (the sensation of stimulation persists for a period of time after the stimulus is removed) and single point sensation (when the corresponding parts on both sides are stimulated at the same time, of the same nature and to the same extent, there is no stimulation on the opposite side of the lesion).

3. Body image disturbance:

Impaired cognition of various parts of the body, manifested as:

① Hemiplegia: Not paying attention to or caring about one's own hemiplegia, as if it has nothing to do with oneself;

② Hemi-neglect: Loss of proper attention to one side of the body;

③ Loss of limb sense, feeling that a limb no longer exists;

④ Hemiplegia ignorance: not knowing or denying that they have hemiplegia;

⑤ Phantom of multiple limbs: believing that one has one or more extra limbs;

⑥ Illusion of limb displacement: for example, believing that one's upper limbs are growing on the stomach or on the ceiling.