Look paralysis — impossibility of the simultaneous movement of both eyeglobes to the right or to the left, up or down. Opinions on anatomic substrate of a symptom disperse. According to one authors, the center
regulating the movement of eyes in this or that party is in a kernel of the taking-away nerve of the same party. Others consider that at paralysis of a look nadjyaderny conduction paths are always surprised. The most detailed is Dezherin's scheme. According to this scheme paralysis of a look can develop, first, at a break of the central cortical and nuclear route which connects the cortical center to kernels of third cranial nerves; secondly, it can be caused by damage of fibers which connect a lateral vestibular nucleus (Deyters's kernel) to kernels of third cranial nerves and which pass in structure of a back longitudinal bunch; thirdly, at defeat of the internuclear fibers connecting a kernel of the VI pair of cherepnomozgovy nerves to a kernel of the III couple and entering also a back longitudinal bunch.
Depending on localization of defeat paralysis of a look can be of the same name with a hemiplegia or cross. At the centers in the forefront of a tire of the bridge, a tire of a mesencephalon or the cortical center of a look of the patient cannot turn a look towards the paralyzed extremities. At the centers in the tail of a tire of the bridge of the patient cannot look towards healthy extremities. Vertical paralysis of a look, i.e. lack of the movement of eyeglobes up or down (a so-called syndrome of Parino), is observed seldom; it is characteristic of bilateral defeats in area of a mesencephalon.
Look spasm — consensual deviation of eyes aside. The hl is observed. obr. at epilepsy, especially at jacksonian epilepsy, and also at big fresh hemorrhages in parencephalons. This symptom indicates irritation of the cortical center regulating assignment of eyes, which is localized in back department of an average frontal crinkle. In such cases eyeballs deviate towards the extremities captured by a spasm. The oculogyric spasm often meets at residual states after epidemic encephalitis. At the same time from time to time eyeballs are violently taken away up and the patient hardly and only for a short time can bring them out of this situation. Also the head is at the same time, as a rule, taken away up. Assignment of eyes and the head in this or that party is less often observed. The general condition of patients during such attacks usually does not worsen.
I. N. Filimonov.