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22 Cards in this Set
- Front
- Back
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How does the hypothalamus regulate homeostatic body environment? |
Thru regulation of autonomic activity |
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What are the External borders of the hypothalamus |
Anterior: Optic Chiasm + Tracts
Posterior: Mammillary bodies |
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Landmarks of the hypothalamus |
Infundibulum Tubercinereum Mammillary bodies |
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What are the Internal borders of the hypothalamus |
Dorsal: Hypothalamic Sulcus Anterior: Lamina Terminalis Posterior: Brainstem |
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What are the functional areas of the hypothalamus |
Caudolateral: Sympathetic activity Rostomedial: Parasympathetic activity |
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How is the hypothalamus connected to the pituitary gland? |
Infundibulum |
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How are the ant and pos lobe of the hypothalamus associated with the pituitary gland |
Ant: Tuberoinfundibular Pos: Supraopticohypohysial |
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Describe the Supraotichypophysical tract |
Supraotic and paraventricular nuclei of the hypothalamus Axons that connect with blood vessesl in the posterior pituitary Release vasopressin and oxytocin |
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What can lesions of the pituitary stalk produce? |
Diabetes insipidus characterized as poly uris and excessive thirst and water |
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What is Oxytocin |
Released Primarily with sexual activity, child birth and release of milk |
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What is the tuberoinfundibular tract |
Connects an pit indirectly through the hypophysial portal system. |
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How are hormones released into the blood stream? |
The hypothalamus produces releasing factors that are transported to the Ant Pituitary via the T-infundibular system to cause the Pit to release hormones into the bloodstream |
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Examples of nuclei that regulate hormone control through the T-infundibular system |
Arcuate nucleus - feeding, behavior, growth Medial preoptic area - Repro hormonal control Parvocellular paraventricular nucleus - Thyrotropin and corticotropins |
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What is contained in the lateral zone of the hypothalamus |
Nuclei that form a feeding center Medial Forerain Bundle - major pathway into and out of hypothalamus |
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What is the ventromedial nucleus |
Contains receptors for Blood glucose and is a satiety center |
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What is the medial mammillary nucleus involved in? |
Memory Pathways |
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What connections with the hypothalamus are important to integrate autonomic affect |
Amygdala and cortex |
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What connection allow for peripheral expression of autonomic effects? |
Medulla and spinal cord |
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What are examples of autonomic reflex control |
Fluid and blood volume Kidney and hypothalamic nuclei |
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Where is the arcuate nucleus |
Lateral hypothalamus |
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How is feeding activated or inactivated? |
Peripheral peptides associated with feeding (leptin and gherlin) are detected by the arcuate nucleus. |
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What receptors does the ventromedial nucleus of the hypothalamus have? |
Glucose and insulin and works withthe AN to incorporate those into feeding behavior. |
