inferior parietal region is one of the most complex analyzers, developed in connection with the social and employment rights.When violations in this area it is impossible to analyze and synthesis of phenomena occurring in the parameters of space, time and mass, in terms of their quality, in abstract terms.
Therefore, with the defeat of the art there astereognosis, and with the defeat of the left hemisphere in right-handers - ideational apraxia, agraphia, dyscalculia (impairment of counting operations), semantic aphasia.Astereognosis caused by the defeat of the inferior parietal lobe, is the primary or as it is sometimes called, apertseptornym type astereognosis.It differs from the secondary (pertseptornogo) astereognosis the fact that when it astereognosticheskie phenomena occur without any significant sensitivity disorders, while the secondary astereognosis due to the defeat of a back central gyrus and the superior parietal lobe, always combined with a loss of proprioceptive sensitivity.
As for apraxia observed in lesions of the inferior parietal lobe, the clinic is manifested mainly in two forms - ideatornoy and motor.The main difference lies in the fact that ideational apraxia is always two-way, the motor apraxia can be localized within a single limb, half of the body, oral musculature.
patients suffering from motor apraxia, unable to produce not only the spontaneous action in a certain systematic, articulate manner, but also to imitate these actions.When ideatornoy apraxia ability to imitate the actions sometimes saved.
localized in the left hand With the defeat aprakticheskie disorders of the corpus callosum.Sometimes emit a special kind of apraxia, known as constructive.The patient is not able to lay down on the instructions of the whole of the parts (of matches folded geometric shape, draw a square, triangle, and so on. D.).
Technique apraxia research is to ensure that the patient is given a number of tasks: an imitation of the doctor's actions, the implementation of facial movements (.. Whistling, threaten with a finger, send a kiss, etc.), some actions (to smoke a cigarette, thread a eye of the needle andt. e.), manipulation of imaginary objects (like fire a gun as use a spoon, a fork, a cut bread as vdevayut thread and so on. d.) transitive actions (touch right index finger of the left ear hands of the right eye andr. h.).
It goes without saying that this or that kind of apraxia (in practice more often mixed forms), as well as different intensity aprakticheskih disorders are caused, in addition to the hearth, and the state of the entire cortex, and the nature of the pathological process.This fact must always be borne in mind when analyzing the pathological symptoms of the higher cortical functions.