psychological problems Flashcards
define sadness, unipolar depression and bipolar depression
sadness - it is a normal human emotion and is a normal reaction to certain experiences, like a death of a pet
unipolar depression - an abnormal emotional state, when an individual experiences one emotional state, which is depression
bipolar depression - repeatedly change between two moods, mania and depression, mania is a state of euphoria/ frenzied activity
define the ICD-10
a set of symptoms decided on by WHO used to diagnose an individual with unipolar depression
give the three key symptoms and three other symptoms of diagnosing unipolar depression
1) low mood
2) loss of interest and pleasure in activities
3) reduced energy levels
4) changes in sleep patterns
5) changes in appetite levels
6) decrease in self-confidence
define neurotransmitter and what an imbalance is caused by
the chemical transmitted between two neurons at a synaptic cleft
low levels of serotonin
what is serotonin responsible for (functions)
helps to control mood, memory, sleep, appetite and aggression
explain how low levels of serotonin are linked to depression
serotonin transmits a message from one neuron to another, if there is plenty of serotonin in the synaptic cleft the message is transmitted and the postsynaptic neuron is stimulated, which leads to improved mood
some people have low levels of serotonin in their brain, which means levels at the synapse are low and the message is not transmitted, resulting in low mood
give the nature and nurture reasons for low serotonin
nature - they can inherit a poor ability to produce serotonin through genetics
nurture - may have low amounts of tryptophan, which is a key ingredient in making serotonin, and is found in high-protein and carb-rich foods
evaluate biological explanations of depression
+ there is supporting research evidence, McNeal and Climbolic found lower levels of serotonin in the brains of depressed people, this suggests that there is a link between low levels of serotonin and depression
- low levels of serotonin could be an effect of being depressed instead of causing the depression, as thinking sad thoughts and having difficult experiences could cause low serotonin, so serotonin levels may be an effect of psychological experiences rather than the cause
- depression may not solely be caused by abnormal levels of neurotransmitters, as some people with low serotonin levels dont have depression and some people with depression dont have low serotonin levels, meaning neurotransmitter explanations are not enough on their own
what are the negative schemas
negative views about the world -> negative views about oneself -> negative views about the future (starts again)
define:
- internal and external attribution styles
- stable and unstable attribution styles
internal - dispositional factors e.g. personality
external - situational factors e.g. weather
stable - fixed/ no change e.g. gender
unstable - temporary e.g. tired
define learned helplessness
a learned, negative attribution style where the person gives up trying
evaluate psychological explanations for depression
+ there is research support for learned helplessness, Seligman found dogs stopped trying to escape electric shocks that they previously had no control over, claims this explains why some people become depressed, as person will have learned to ‘give up’ when given a challenge, therefore research supports his explanation as dogs’ previous negative attributes caused them to give up
- negative beliefs may simply be realistic than depressing, person with opposite attributional style may have other problems because they are unrealistic in understanding of the situation, Alloy and Abramson found depressed people gave more accurate estimate of likelihood of a disaster than non-depressed people, suggests that depressed people may be sadder yet wiser, therefore negative attributional style may be a more accurate way of looking at the world
what does SSRI stand for
selective serotonin reuptake inhibitors
outline how serotonin works in the brain under normal circumstances
- serotonin released by certain neurons in brain and stored at the end of a transmitting neuron in tiny sacs called vesicles
- electrical impulse travelling through neuron makes vesicles release neurotransmitter into synaptic cleft
- serotonin molecules convey signal form presynaptic to postsynaptic neuron by attaching to receptor sites
- remaining serotonin reabsorbed into presynaptic neuron
how do SSRIs work in brain for depressed people with low serotonin
- people with depression have lower levels of serotonin
- so less serotonin is available to attach to postsynaptic neurons to convey message and improve mood
- SSRI antidepressants prevent serotonin from being reabsorbed into presynaptic neuron
- so more serotonin is available at synapse to bind to receptors on postsynaptic neuron