biopsych ; endogenous pacemakers / exogenous zeitgebers

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ENDOGENOUS PACEMAKERS + SLEEP/WAKE
DFGD
1 of 53
- SCN
dfgdf
2 of 53
tiny bundle nerve cells where?
hypothalamus
3 of 53
influential in maintaning what kind of rhythms?
circadian rhythm
4 of 53
recieved information about light from which structure it's directl above?
optic chiasm
5 of 53
this continues even when?
eyes closed
6 of 53
enabling biological clock to do what?
adjust to changing patterns of daylight whilst asleep
7 of 53
-animal studies and SCN
dfgdf
8 of 53
decoursey et al worked on how many chipmunks?
30
9 of 53
and did what to them?
destroyed SCN connections
10 of 53
they were then returned to natural habitat for how long?
80 days
11 of 53
what happened to sleep/wake cycle?
disappeared
12 of 53
and by end of study what had happened to sig proportion?
killed by preditors
13 of 53
- pineal gland and melatonin
dfgfd
14 of 53
SCN passes what info on to pineal gland?
day lenght / light info
15 of 53
in night pineal gland increases productin of?
melatonin
16 of 53
a chemical that induces?
sleep
17 of 53
melatonin has also been suggested as a cauasl factor in?
SAD
18 of 53
EXOGENOUS ZEITGEBERS + S/W
DFGDF
19 of 53
env factors that reset bio clocks through process known as?
entrainment
20 of 53
in absence of external cues what happens to fee running?
continues in distinct cyclical pattern
21 of 53
to s/w seems to be determined by?
interaction of int/ext factors
22 of 53
- light
dfgd
23 of 53
can reset the body's main endogenous pacemaker called?
SCN
24 of 53
light also indirect influence on key processes in body that control functions like?
hormone secretion / blood circ
25 of 53
campbell and murphy demonstrated light may not recieved by eyes but still detected by?
skin receptor sites
26 of 53
how many pps?
15
27 of 53
woken at various times and what happened?
light pad shone on backs of knees
28 of 53
managed to produce deviation in ysyal s/w of up to how ling?
3hrs
29 of 53
suggests?
light powerful EZ not necc reliant on eyes
30 of 53
EVALUATION
DGDF
31 of 53
:( animal study ethics
dgdf
32 of 53
animals in decoursey were exposed to?
considerable harm
33 of 53
and subsequen?
risk
34 of 53
when what ahppened to them?
returned to natural habitat
35 of 53
what is a big matter of debate?
whether the ends justify the means
36 of 53
:( EZ inf overestimated
dgd
37 of 53
miles recounts the story of a blind from birth young man with circ rhythm of?
24.0hrs
38 of 53
despite exposure to social cues what couldn't be adjusted?
s/w cycle
39 of 53
so at night he had to?
take sedatives
40 of 53
and in morning?
stimulants
41 of 53
similarly studies of arctic ppl display what?
normal sleep patterns even in summer
42 of 53
both these suggest what about EZ?l
little bearing on internal rhythm
43 of 53
EVAL EXTRA
DFGDF
44 of 53
:( methodological issues
dfgd
45 of 53
what about findings from campbell + murphy?
yet to be replicated
46 of 53
other psychs have been critical and suggested what confounding variable?
exposure to eyes limitedl when woken up
47 of 53
also isolating EZ in this way doesn't give us insigt into what?
many other EZs rhat inf s/w
48 of 53
:/ interactionist system
dfgd
49 of 53
only in exceptional circumstances does what take place?
fre running
50 of 53
total isolation studies are extremely rare and could be judged lacking what for this reasin?
validity
51 of 53
in real-life what happens?
EZ + EP interact
52 of 53
so what makes little sense?
separating them for research purposes
53 of 53

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- SCN

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dfgdf

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tiny bundle nerve cells where?

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influential in maintaning what kind of rhythms?

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recieved information about light from which structure it's directl above?

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