Quiz 6 Hypothalamus Flashcards Preview

CNS > Quiz 6 Hypothalamus > Flashcards

Flashcards in Quiz 6 Hypothalamus Deck (40):
1

The hypothalamus forms what?

Floor for the 4th ventricle & portions of the 3rd ventricles lateral walls

2

What else is considered apart of the structure of the hypothalamus?

Infundibular stalk, and the optic chiasma

3

What are the 2 zones of the hypothalamus?

Medial & lateral zones

4

The medial zone can be subdivided into?

Anterior, intermediate & posterior areas

5

Has vague control of?

hunger, thirst, & sex

6

Hypothalamus controls ________ aspects of _______ expression

Physical, emotional

7

Hypothalamus has control over _______ functions

Visceral (autonomic)

8

Anterior & intermediate areas
Increases digestive motility
Decreases heart rate
Constriction of the pupil

Parasympathetic control

9

Posterior area (includes the post. nuclei & the mammillary bodies)
Increases heart rate & vasoconstriction
Decreases digestive motility
Responsible for pupil dilation, piloerection & sweat gland secretions

Sympathetic control

10

- Directly via neuron axon extensions into the posterior pituitary
- Indirectly via neurohormones to control the release of anterior pituitary hormones

Endocrine control from the hypothalamus

11

Area just above the optic chiasma

Anterior area

12

Nuclei found in the anterior area: (of the medial zone of the hypothalamus)

Supraoptic & paraventricular nuclei
Suprachiasmatic Nuclei (SCN)
Anterior nucleus
Preoptic area (nucleus)

13

This nuclei terminates in the posterior pituitary where they both release _______ and ADH hormones

Supraoptic & paraventricular nuclei
Oxytocin

14

Stimulates uterine contraction & the let down of breast milk

Oxytocin

15

Prevention of urination or help to retain H2O

ADH

16

Nucleus responsible for much of our circadial (daily) rhythms like temp, sleep, light, feeding...

Suprachiamatic Nuclei (SCN)

17

Suprachiamtic Nuclei is complexly connected to the ______ gland & it secretions into the bloodstream

Pineal gland

18

Gnerally known for parasympathetic functions

Anterior nucleus

19

Thermo-regulator; Esp. as the body HEATS up

Preoptic area (nucleus)

20

Nuclei found in the Intermediate area of the medial zone of the hypothalamus?

Dorsomedial nuclei
Ventromedial nuclei
Arcuate nuclei
Tuber cinereum

21

Significant GI tract parasympathetic influence, The nucleus is fairly diffuse

Dorsomedial nuclei

22

Very complex & many attributes. A center for eating & thirst gratification or fullness center

Ventromedial Nuclei

23

- Near the infundibular stalk
- Contribute axons to the so-called tract tuberoinfundibular tract
- Terminate & secrete their neurohormones into the perivascular spaces of the infundibular stalk

Arcuate nuclei

24

Neurohormones (of the arcuate nuclei) pass to the anterior pituitary by way of the bloodstream where they influence the release of pituitary hormones. Commonly know as:

Releasing factors

25

A term used to describe the undulating bulge between the infundibular stalk & the large mammillary bodies.

Tuber cinereum

26

Posterior area include what nuclei?

Mammillary bodies
Posterior nuclei

27

Nucleus (with hippocampal formation & anterior thalamic nuclei) important in short term memory

Mammillary bodies

28

Korsakov's Syndrome

Loss of short term memory (from alcohol)

29

Thermoregulator: esp. as the body cools down. Stimulating shivering

Posterior nuclei

30

______ area is known for diverse sympathetic actions.

Posterior area

31

Pars nervosa and neurohypophsysis are another name for?

Posterior pituitary

32

The posterior pituitary develops from what embryologically?

Diencephalon

33

What is another name for the posterior pituitary ?

Pars nervousa or neurohypophysis

34

Which area gives rise to the anterior pituitary (adenohypophysis) and intermediate pituitary?

Rathke's pouch

35

What would fibers from the hypothalamic nuclei be doing if they descends to specific nuclei for cranial nerve III, VII, IX or X?

Parasympathic

36

Most blood to the pituitary & infundibular stalk comes from branches of the?

Internal carotid arteries

37

Within the infundibular stalk the small arteries break into highly permeable capillaries called?

Fenestrated sinusoids

38

The fenestrated sinusoids pick up ______ _____ from the ________________ tract fibers.

Releasing factors ; tuberoinfundibular tract fibers

39

A series of small veins drain the hormone - laden blood b/t 2 capillary beds are called ?

Hypophyseal portal vein

40

Once the releasing factors enter the substance of the anterior pituitary they exert a controlling influence on the release of the ?

Pituitary hormones