hypothalamus l.
Skip this Video
Loading SlideShow in 5 Seconds..
HYPOTHALAMUS PowerPoint Presentation
Download Presentation

Loading in 2 Seconds...

play fullscreen
1 / 12

HYPOTHALAMUS - PowerPoint PPT Presentation

  • Uploaded on

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.

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation


An Image/Link below is provided (as is) to download presentation

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.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
hypothalamus functions
Hypothalamus Functions
  • Controls/integrates ANS.
  • Raises arterial blood pressure and increases heart rate (posterior).
  • Lowers arterial blood pressure and decreases heart rate (anterior).
hypothalamus functions3
Hypothalamus Functions
  • Reception and integration of visceral sensory impulses.
  • Intermediary between nervous and endocrine systems.
hypothalamus functions4
Hypothalamus Functions
  • Produces ADH and oxytocin.
  • Involved in psychosomatic disorders.
  • Associated with rage and aggression.
  • Controls normal body temperature.
hypothalamus functions5
Hypothalamus Functions
  • Regulates food intake.
  • Maintains extracellular fluid volume.
  • Biorhythm oscillator.
  • Sexual center.
hypothalamic nuclei
Hypothalamic Nuclei
  • Mammillary bodies:

Involved in olfactory reflexes and emotional responses to odors.

Relay stations for olfactory neurons to inferior colliculi.

hypothalamic nuclei7
Hypothalamic Nuclei
  • Supraoptic nuclei :

Send projections (axons) that release neurohormones into capillaries in the posterior pituitary:



hypothalamic nuclei8
Hypothalamic Nuclei
  • Suprachiasmatic nuclei:

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.

  • Anterior nuclei:

Caudal continuation of the medial preoptic area.

hypothalamic nuclei9
Hypothalamic Nuclei
  • Paraventricular Medial Division:

Projects to the median eminence.

Secretes releasing or inhibiting hormones into hypothalamo-hypophyseal portal system:

Corticotropin releasing factor.

Thyroxin releasing factor.



hypothalamic nuclei10
Hypothalamic Nuclei
  • Paraventricular Intermediate magnocellular division:

Sends projections to the posterior pituitary that release oxtocin and vasopressin

  • Paraventricular lateral division:

Receives large number of inputs from brainstem nuclei, other hypothalamic nuclei, limbic system, etc. and projects to a number of sympathetic structures.

hypothalamic nuclei11
Hypothalamic Nuclei
  • Medial preoptic area

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

  • Tuberal level:

Previously considered to be a feeding center and a pleasure center.

Lesions here reduce eating behaviors.