HYPOTHALAMUS. Hypothalamus Functions. Controls/integrates ANS. Raises arterial blood pressure and increases heart rate (posterior). Lowers arterial blood pressure and decreases heart rate (anterior). Hypothalamus Functions. Reception and integration of visceral sensory impulses.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Involved in olfactory reflexes and emotional responses to odors.
Relay stations for olfactory neurons to inferior colliculi.
Send projections (axons) that release neurohormones into capillaries in the posterior pituitary:
Located immediately above optic chiasma.
Acts as a master biologic clock, controlling circadian and circannual rhythms.
Set to light-dark cycle by a direct retinal projection to the suprachiasmatic nucleus.
Caudal continuation of the medial preoptic area.
Projects to the median eminence.
Secretes releasing or inhibiting hormones into hypothalamo-hypophyseal portal system:
Corticotropin releasing factor.
Thyroxin releasing factor.
Sends projections to the posterior pituitary that release oxtocin and vasopressin
Receives large number of inputs from brainstem nuclei, other hypothalamic nuclei, limbic system, etc. and projects to a number of sympathetic structures.
Much larger in males than in females
Contains cells that release gonadotropin- releasing factors to the median eminence into the hypothalamo-hypophyseal portal system.
Involved in temperature regulation
Previously considered to be a feeding center and a pleasure center.
Lesions here reduce eating behaviors.