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Biological Approach (Assumption 2: Behaviour can be explained in terms of…
Biological Approach
Assumption 2:
Behaviour can be explained in terms of
Localisation
of brain function.
Different areas of the
brain
have been identified.
Each area has a specialised
function
.
The
cerebral cortex
is the
outer
layer of our brain and it's divided into four regions/lobes.
1.
Frontal Lobes
2.
Parietal Lobes
4.
Occipital Lobes
3.
Temporal Lobes
For example, one specific area of the brain is linked with
aggressive behaviour
is the
pre-frontal cortex
.
Underneath the cerebrum is the
limbic system
which includes the
amygdala
which is involved in triggering
aggressive
behaviour.
Assumption 3.
Behaviour can be explained in therms of
Neurotransmitters
Neurons
are cells that make up our
nervous
system.
The human
brain
has thousands of neurons.
Neurons are charged with an
electrical
signal.
They communicate with each other through
synapses
(or
gaps
between two neurons).
In the synapse a
chemical
message (called a neurotransmitter) is sent from one
neuron
to the next.
An example is
serotonin
Low
levels of serotonin are associated with mood disorders such as
depression
. Some antidepressants work by increasing the amount of serotonin in our nervous system.
Assumption 1:
Behaviour can be explained in terms of
Evolutionary
influences.
Evolution
can explain how the mind and our behaviour has changed over millions of years.
We have
adapted
to the demands of our environment.
The idea of adaptiveness is based on Darwin's theory of
natural selection
.
Any behaviour that helps an individuals chance of
survival
and
reproduction
will be naturally selected (i.e
behaviours
are passed on to future generations).
Natural selection can explain
mate selection
(how we form relationships).
Men
seek
women
who look like good 'baby makers' - young/attractive =
fertile
. Women seek males who can provide for them during pregnancy/raising a young child.