TECTAL AND BULBOPONTINE EYELID REFLEXES AND MECHANISM OF THE SLEEPING ATTITUDE OF THE ACUTE THALAMIC PIGEON

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Abstract
Tectal eyelid reflexes were found in the acute thalamic pigeon after asymmetrical and subliminal strychninization of the optic lobes. In the normal animals, the eyelid reflexes are, however, chiefly integrated at a bulbopontine level. The sleeping attitude of the acute thalamic pigeon is probably due to the central blindness, which decreases the influence of the retinal impulses on the central tonus of the palpebral motoneurones.

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