The role of neural mechanisms in the regulation of intraocular pressure in the cat.

摘要: Abstract The afferent activity evoked by intraocular pressure changes, the effects of stimulation retrobulbar nerves on pressure, and evidence occurrence central integration were examined in cats over short periods. Afferent was recorded from long ciliary isolated preparations as well situ . Spontaneous which could be related to resting levels not observed any preparation. An increase elicited a discharge impulses, frequency directly level. Preparations generally more stable yielded reproducible results. temporal pattern pressure-evoked different that mechanical cornea or iris. Stretching nerve endings located outer coats eye appears initiate impulses raising pressure. Stimulation ganglion its motor root, perfused eyes caused fall A small without circulation, due increased inward tension chorioid during muscle contraction. produced sympathetic activity. This is masked intact extraocular structures. Efferent either modulated changes. Retrobulbar injection lidocaine did affect cat nor it rat at returned normal after imposed These observations are discussed relation postulated neural control