Aggression: Hormones Flashcards Preview

Psychology - Biological > Aggression: Hormones > Flashcards

Flashcards in Aggression: Hormones Deck (14):
1

What are hormones?

- chemical messengers
- travel in the blood
- slower than neurotransmitters
- affect metabolism, mood, reproduction and sexual function

2

Adrenaline and noradrenaline: Where is it released from?

adrenal gland

3

Adrenaline and noradrenaline: What does it prepare the body for?

- provides the body with energy for fight or flight

4

Adrenaline and noradrenaline: Haller and Kruk (2003)

- the two hormones are influenced by the limbic system
- they lead to aggression in terms of stressors
- intense/long term stressors can lead to aggression

5

Testosterone: Which sex is more aggressive? Give statistics.

- males
- men commit 50-70% of all violent crime
- Raine found 5% of males were characterised by antisocial behaviours

6

Testosterone: When does crime rise in humans and what might account for this?

- early to mid teens
- this is when testosterone levels are increased

7

Testosterone: Kalat (1998)

- measured 15-25 y/o males
- those with highest testosterone levels showed highest aggression (crime stats)

8

Testosterone: Dabbs et al (1987)

- saliva tests to measure testosterone
- 89 male prisoners (some violent, some not)
- violent: higher testosterone levels
- rated as tough by peers

9

Testosterone: What are the findings from castrated non-humans?

- castrated male rodents
- least aggressive due to drop in testosterone
- injected with T, aggression increased

10

Cortisol: What is it? Why is it released?

- steroid hormone
- produced by adrenal gland
- in response to stress
- also called stress hormone

11

Cortisol: Barzman et al (2013)

- 17 boys, aged 7-9
- measuring cortisol in saliva
- aggression measured in 2 rating scales
- positive correlation between cortisol and aggression

12

Corticosterone: Compare to cortisol.

- similar structure
- different hormone

13

Corticosterone: Adelson (2004)

- raised stimulation of aggression control centre in the brain went with raised stress hormones
- lowered stimulation went with lower level of stress hormone
- in humans: this could explain why stress can lead to aggression and vice versa

14

Corticosterone: Similar study to Adelson (2004)?

- same hypothesis
- removed rat's adrenal gland so stress hormones wouldn't be released
- injected rat with corticosterone
- immediate effect: attack response given by stimulating hypothalamus
- conclusion: stress hormone lowers reluctance for aggression by stimulating an attack response in the brain