psychopathology ; biological explanation for ocd

GENETIC EXPLANATIONS
DGF
1 of 64
genes are involved in hat about OCD?
individual vulnerability
2 of 64
lewis observed that of his OCD patients what % had parents with OCD?
36%
3 of 64
and siblings?
21%
4 of 64
what does this suggest about OCD?
runs in families
5 of 64
although doesn't pass certaintiy onto the next gen but?
vulnerability
6 of 64
according to the diathesis-stress model what happens?
genes leave some ppl more likely to suffer OCD but env stress is necc to trigger
7 of 64
- candidate genes
dfgd
8 of 64
what are these?
genes that create a vulnerability
9 of 64
some of these are involved in regulating dev of what sys?
serotonin
10 of 64
does the SERT gene cause higher or lower serotonin levels?
lower
11 of 64
- polygenic
dfgd
12 of 64
what does this mean?
several genes are involved
13 of 64
taylor fd evidence of how many genes involved?
up to 230
14 of 64
including those associated with the action of what two neurotransmitters?
dopamine / serotonin
15 of 64
both of which believe to have a role in regulating?
mood
16 of 64
- different types of OCD
fg
17 of 64
what does it mean that OCD is aetiologically heterogeneous?
different grps of genes can cause the disorder in diff ppl
18 of 64
theres also some evidence to suggest the different OCDtypes may be the result f?
particular genetic variations
19 of 64
EVALUATION
DF
20 of 64
:) supporting evidence
dgd
21 of 64
one of the best sources of evidence for impotance of genes in hat kind of studies?
win
22 of 64
nestadt et al reviewed prev twin studies and fd what % MZ twins shared OCD?
68%
23 of 64
whereas DZ?
31%
24 of 64
:( too many cdid8 genes
dgd
25 of 64
what is one reason for the difficulty of pinning down genes?
several genes are involved
26 of 64
consequence is that genetic exp is unlikely ot ever be useful why?
provides little predictive value
27 of 64
:( environmental risk factors
dfg
28 of 64
cromer et al fd over what % patients had traumatic event in past?
50%
29 of 64
and was their OCD more or less severe?
more
30 of 64
this suggests OCD isn't entirely?
genetic
31 of 64
may be more productive to focus on environmental causes why?
we are more able to do something abut them
32 of 64
NEURAL EXPLANATION
DFG
33 of 64
genes assoc are likely to affect levels of key neurotrans as well as?
brain structures
34 of 64
- role of serotonin
dfg
35 of 64
what is serotonin believed to help regulate?
mood
36 of 64
neurotrans are responsible for doing what in the body?
relaying info from one neuron to the next
37 of 64
if a person has low serotonin levels then what doesn't take place?
normal transmission of mood relevant info
38 of 64
- decision-making systems
dfg
39 of 64
what type of OCD especially assoc w/ impaired decision making?
hoarding
40 of 64
this may be assoc with abnormal functioning where in the brian?
lateral frontal lobes
41 of 64
frontal lobes are responsible for which two things?
logical thinking / decision making
42 of 64
also evidence to suggest where functions abnormally?
parahippocampal gyrus
43 of 64
which is associated with doing what?
processing unpleasant emotions
44 of 64
EVALUATION
DFD
45 of 64
:) some supporting evidence
dg
46 of 64
some antidepressants are effective in reducing symptoms and they work only on?
serotonin system
47 of 64
increasing or decreasing levels?
increasing
48 of 64
this suggests what is involved?
serotonin system
49 of 64
:( not clear what neural mechanisms involved
dfg
50 of 64
studies of what systems have shown these are also the systems functioning abnormally in OCD?
decision making
51 of 64
research has also found what kind of brain sustems th?
sometimes but not always ocd involved
52 of 64
we cannot terefore claim to?
really understand neural mechs in OCD
53 of 64
:( shouldn't assume they cause ocd
dgd
54 of 64
evidence to suggest what about some neurotransmitters and brain structures?
don't function normally / ocd
55 of 64
but this isnt the same as saying?
they cause ocd
56 of 64
these biological anomalies could actually eb?
result of ocd > cause
57 of 64
EVAL EXTRA
DFH
58 of 64
:( serotonin-OCD might be depression co-morbididy
df
59 of 64
depression probably involves disruption to?
OCD system
60 of 64
leaves with logical problem when suggesting serotonin system as?
basis for OCD
61 of 64
could simply be that serotonin is disrupted why?
bc depressed
62 of 64
:( twin studies flawed as genetic evidence
dfgdf
63 of 64
yeah we can explain that
dg
64 of 64

Other cards in this set

Card 2

Front

genes are involved in hat about OCD?

Back

individual vulnerability

Card 3

Front

lewis observed that of his OCD patients what % had parents with OCD?

Back

Preview of the front of card 3

Card 4

Front

and siblings?

Back

Preview of the front of card 4

Card 5

Front

what does this suggest about OCD?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Psychology resources:

See all Psychology resources »See all psychopathology resources »