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Eyelid opening stretches mechanoreceptors in the supratarsal Müller muscle to activate the proprioceptive fiber supplied by the trigeminal mesencephalic nucleus. This proprioception induces reflex contractions of the slow-twitch fibers in the levator palpebrae superioris and frontalis muscles to sustain eyelid and eyebrow positions against gravity. The cell(More)
The presence of high concentrations of both dopamine and cholecystokinin (CCK) in the striatum and in various limbic structures suggests that the CCK may not only influence dopaminergic transmission, but it also may be relevant to the psychopathology of schizophrenia and to the therapeutic effects of neuroleptics. By using a synaptosomal fraction isolated(More)
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