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Biological approach - Coggle Diagram
Biological approach
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- believes - everything psychological is at first biological
- genes are important in understanding behaviour
- interested in looking at how behaviour can be inherited / passed on
- interested in studying twins to find evidence for genetic explanations for behaviour
- interested in looking at role of brain chemistry & hormones on behaviour
- consider tole that evolution might play in explaining behaviours - looking at behaviours that might have been adapted for ancestors to explain behaviour today
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cerebrum - 85% total mass of brain
- outer surface of cerebrum =
cortex - 'higher order' functions
- frontal lobe -
speech, thought & learning
- Parietal lobes -
sensory info - touch, temp, pain
- Temporal lobes -
hearing & memory
- Occipital lobes -
visual info
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- compromised of several connected systems:
- CNS - comprises
brain & spinal cord
- PNS -
comprises somatic * autonomic nervous system
- aspects of behaviour under neuronal control - breathing, eating, sexual behaviour
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- nerve impulse reaches end of one neuron chemical called a neurotransmitter realeased
- travels to next neuron along a synapse
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Excitatory neurotransmitters - trigger nerve impulses in receiving neuron & stimulate brain into action
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Inhibitory neurotransmitters - inhibit nerve impulses to calm brain & balance mood
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- chemicals produced by endocrine glands e.g. pituitary gland
- secreted directly in bloodstream
- causes physiological reaction in cell
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- BP's believe - psychological characteristics were adaptive - intelligence & aggression.
- aggression = widespread in animal behaviour - seen to be adaptive as it promotes survival