Week 7 Flashcards Preview

Psych 421 > Week 7 > Flashcards

Flashcards in Week 7 Deck (73)
Loading flashcards...
1

Telencephalon cerebral cortex limbic structures (5)

Cingulate gurus
Para-hippocampal gyrus
Enorhinal cortex
Prefrontal cortex (esp. sub-callosal gyrus)
Temporal cortex

2

Sub-cortical telencephalon Limbic areas (5)

Hippocampus
Amygdala
Septal nuclei
Nucleus accumbens
Caudate & ventral pallidum

3

Diencephalon limbic areas (3)

Hypothalamus
Anterior thalamus
Habenula

4

Mesencephalon limbic areas (4)

VTA
Central Gray
Raphe nucleus
PPT

5

Metencephalon limbic areas

Locus coeruleus

6

Limbic area pathway

Hippocampus-->mammillary bodies *via the fornix

Mammillary bodies-->anterior thalamus *via mammothalamic tract

Anterior thalamus-->cingulate gyrus

Cingulate gyrus-->parahippocampal gyrus

Parahippocampal gyrus--> entorhinal cortex

Entorhinal cortex-->hippocampus *via perforant pathway

7

Hypothalamus 4 roles

1. Monitor body functioning (survival). I.e. Glucose, insulin, CO2, etc.

2. Maintain homeostasis

3. Maintain hormonal environment by interacting with pituitary

4. Trigger sympathetic response

8

2 areas of hypothalamus

Medial area: contains most nuclei

Lateral area: has most fibers

9

4 divisions of medial area nuclei

1. Pre-optic area
2. Supra-optic area
3. Tibetan area
4. Mammillary bodies

10

Pre-optic area nuclei (2)

1. Medial pre-optic nuclei
2. Lateral pre-optic nuclei

11

Lateral pre-optic nuclei function

Contains osmoreceptors for fluid balance

12

Sexually dimorphic area of pre-optic area IN RATS

SDN larger in males than females

Medial pre-optic nucleus mediates masculine behavior

VMH mediated female sexual behavior

13

Supra-optic area nuclei (5)

1. Anterior hypothalamus
2. Suprachiasmatic nucleus
3. Supra-optic nucleus
4. PARAventricular nucleus
5. OVLT

14

Suprachiasmatic nucleus function

Receives direct projections from the retina

Involved in mediation of biological rhythms

15

Anterior hypothalamus studies on sexuality

INAH-3 nuclei smaller in homosexual men (died of AIDS)
-similar in size to heterosexual women

16

Supraoptic and PARAventricilar function

Project to posterior pituitary

-magnocellular neurons make oxytocin & vasopressin

-parvocellular neurons express releasing factors

17

Magnocellular neurons

Make oxytocin and vasopressin

18

Parvocellular neurons

Express releasing factors

19

Nuclei of tuberal area (4)

1. VMH
2. DMH
3. Arcruvate nuclei
4. PERIventricular nuclei

20

Infundibulum

Stalk that connects pituitary to hypothalamus (tuberal area)

21

Median eminence

Point of connection between hypothalamus and pituitary

22

VMH function

Food regulation
Lesions lead to obesity (overeating)

23

PERIventricular nucleus

Surrounds the ventrical

24

Mammillary body area nuclei (2)

1. Mammillary bodies
2. Posterior nuclei

25

Mammillary body and posterior nuclei functions

Both: autonomic functioning

Mammillary bodies: memory consolidation

Posterior nuclei: thermoregulation

26

Anterior pituitary function

Blood circulation
-release releasing factors into portal system
-provoke/inhibit hormone cells

27

Posterior pituitary function

Neural connections
Release hormones into circulation

28

Magnocellular neurons release oxytocin pattern

fire in phasic pattern

29

Magnocellular neurons release vasopressin and pattern

Fire in tonic pattern

30

Oxytocin in bonding and monogamy

Involved in maternal behavior and bonding behavior