CORNEAL REFLEX

From Big Medical Encyclopedia

CORNEAL REFLEX (reflexus cornealis; lat. cornealis horn; reflex, synonym lid reflex) — a reflex smykaniye a century at a light touch (a soft piece of paper or cotton wool) to a cornea of an eye. Dugu K. rubles make fibers of the first branch of a trifacial (an afferent part), a kernel of a spinal way of this nerve and fiber of a facial nerve (an efferent part).

To. the river differs in constancy, being very important among the reflexes caused from mucous membranes. Defeat of a reflex arc in any its place leads to decrease or loss of this reflex. At heavy brain disturbances (shock, coma, etc.), and also at a deep anesthesia To. the ruble is not called. Most often decrease or lack of a reflex is observed at patol, processes in the field of back and average cranial poles, defeats V and VII cranial nerves, and also upper cervical segments of a spinal cord. The reflex drops out at defeat of the cornea.

The conjunctival reflex is generally similar to corneal; he is called by the same way, but from a conjunctiva. This reflex has smaller constancy, decrease or its loss can demonstrate defeat of any link of a reflex arc.


Bibliography: Blumenau L. V. Brain of the person, page 103, L. — M, 1925; Hodos X. G. Nervous diseases, page 139, M., 1974.

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