Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/36

Click to flip

36 Cards in this Set

  • Front
  • Back
List the three regions of the medial hypothalamus zone.
1. Suproptic
2. Mammilary
3. Tuberal (infundibular)
List the nuclei of the supraoptic region.
Paraventricular
Anterior
Suprachiasmatic
Supraoptic
Function of Paraventricular nu.
Salt/water balance

Stress response
Function of Anterior nu.
Parasympathetic

Body temperature regulation
Function of Supraoptic nu.
Salt/water balance

Smooth muscle contraction
Function of Suprachiasmatic nu.
Controls circadian rhythms.
Function of Dorsomedial nu.
Sham Rage
Function of Ventromedial nu.
Satiety Center (inhibition of hunger)
Function of Arcuate nu.
Appetite & Energy balance
Function of Lateral Zone nu.
Hunger Feeding Center

Wakefulness
Function of Mammillary nu.
Part of Papez circuit
Function of Posterior nu.
Heat production/conservation

Sympathetic
List the nuclei of the Tuberal Region.
Dorsomedial nu.

Arcuate nu.

Ventrolateral nu.
List the nuclei of the Mammillary region.
Lateral nu.

Mammillary nu.

Posterior nu.
What causes narcolepsy?
Orexin deficiency

or

Orexin receptor gene mutation
Where would you expect thermoreceptors in the hypothalamus?
Preoptic nu.

Anterior nu.
Orexin neurons can be found where?
Lateral zone
Glucoreceptors can be found where?
Ventromedial nu.

Lateral hypothalamus
Osmoreceptors can be found where?
Posterior hypothalamus

OVLT
What mediates the influence of the Prefrontal cortex to the hypothalamus?
Dorsomedial Thalamic nu.
What mediates the influence of the Orbital Frontal Cortex & Septal nu. on the hypothalamus.
Medial Forebrain Bundle
What mediates influence of the Hippocampal complex on the hypothalamus?
Fornix
What mediates influence of the Amygdala on the Hypothalamus?
Stria Terminalis

&

Ventral Amygdalofugal Bundle
Describe the events for the utilization of the Hypothalamohypopophyseal Tract.
Increase in:
- Angiotensin II
- Blood Osmolarity

Decrease in:
- Cardial Atrial filling

Causes the release of:
- ADH (vasopressin)
- Oxytocin

From the:
- Paraventricular nu. (PVN)
- Supraorbital nu. (SON)

The hormones get transported to the Neurohypophysis (Posterior Pituitary)

via the Hypothalamohypophyseal tract.

The Neurohypophysis will then release these hormones.
Renin
- Induced by what hormone?
- Released from where?
- What does it do?
ADH

Juxtaglomerular apparatus of kidney

Further releases Angiotensin II
Atrial Natriuretic Factor
- Released when?
- Function?
Stretch of Atria

Inhibits ADH and Aldersterone,

thus inhibiting the Angiotensin-Renin System (excretion increase)
Oxytocin function?
Causes breast duct smooth muscle to contract

Causes Uterine smooth muscles to contract
Where is the hypophyseal Portal system?
Median Eminence
Describe the Hypophyseal Portal System.
Releasing and Inhibiting factor are released from some hypothamalus nuclei

These enter the Hypophyseal portal system (in the median eminence)

And carried to the Adenohypophysis (Anterior Pituitary)

Where the regulate release of:

FSH
LH
ACTH
TSH
Prolactin
Growth Hormone (GH)
Describe the rate of hormone release and the type of action involved.
Pulsatile release

Long-term action
List the pathways used by the Hypothalamus (also list what gets affected).
1. Mamillothalamic Tract (Cingulate/Prefrontal Cortex)

2. Medial Forebrain Bundle (Orbital Frontal Cortex/Septal Area)

3. Amygdala
Bilateral destruction of the anterior nu. of the hypothalamus leads to what?
Hyperthermia
Bilateral destruction of the Posterior nu. of the hypothalamus leads to what?
Poikilothermia
Bilateral destruction of Lateral nu. of the hypothalamus leads to what?
Aphagia
Bilateral destruction of the Ventromedial nu. of the hypothalamus leads to what?
Hyperphagia
Bilateral destruction of the PVN and SON of the hypothalamus would lead to what?
Diabetes insipidus
Polyuria
Polydipsia