Connections of cerebral structures functioning in neurohypophysial hormone release
| Autor: | Robert C. Holland, Ervin W. Powell, William H. Woods |
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| Rok vydání: | 1969 |
| Předmět: |
Time Factors
Vasopressins Neurohypophysial hormone Hypothalamus Biology Oxytocin Gyrus Cinguli Hippocampus Supraoptic nucleus Basal Ganglia Stereotaxic Techniques Diencephalon Mesencephalon Pregnancy Pons medicine Limbic System Methods Animals Lactation Medial forebrain bundle Molecular Biology Evoked Potentials Tectum Mesencephali General Neuroscience Medial lemniscus Subthalamus Anatomy Vestibulocochlear Nerve medicine.anatomical_structure nervous system Dorsal longitudinal fasciculus Female Neurology (clinical) Rabbits Neuroscience hormones hormone substitutes and hormone antagonists Developmental Biology Brain Stem |
| Zdroj: | Brain research. 12(1) |
| ISSN: | 0006-8993 |
| Popis: | Summary Connections to the paraventricular and supraoptic nuclei from cerebral structures rostral to the pons related to neurohypophysial hormones release were determined by milk-ejection, pressor, evoked potential and degeneration techniques. Milk-injection (oxytocic) responses were readily obtained from stimulating the hippocampal rudiment and nucleus accumbens. Oxytocic and vasopressor responses resulted from stimulation of the midbrain central gray, subthalamus and posterior hypothalamus. Evoked potentials having a latency of 7 msec or less were recorded from the paraventricular and supraoptic nuclei following stimulation of the former structures. Responses and latencies greater than 7 msec were registered in the supraoptic nucleus when the cingulate cortex, claustrum, putamen, medial lemniscus, superior colliculus and prectum were stimulated. Degeneration patterns from lesions in the hippocampal rudiment reveal direct projections to the paraventricular nucleus via the superior fornix anf fornix column but not to the supraoptic nucleus. Following lesions in the midbrain central gray, connections were traced to the hypothalamus and subthalamus via the dorsal longitudinal fasciculus, mammillary peduncle and medial forebrain bundle. From lesions in the subthalamus and posterior hypothalamus, degenerated fibers entered the medial forebrain bundle and projected to the supraoptic and paraventricular nuclei, respectively. These results show that the hippocampal rudiment, central gray, subthalamus and posterior hypothalamus are intimately involved in mechanisms of |
| Databáze: | OpenAIRE |
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