Satiation Essay Plan / Notes

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  • Created on: 08-04-14 12:53
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Sheet
5 08.
04.
2014
Eat
ing
Behavi
our
D i
scuss neu r
a l
me cha ni
sms i
nv ol
v e d
in
con t
rol
li
n g
s at
ia t
ion (
2 4ma r
k s)
AO1: AO2:
Sati
ety i
s t
he
u ncons cious physiol
o g ical
process t
hat st
o ps you
ea t
ing.
T he V MH i
s
t
h e
sa t
iet
y centre.
T he VMH pr
ov i
de s
the
si
gn al
to
stop eati
n g.
The w al
ls
of
the
stoma ch and i
ntestin al
B ut
sa t
iet
y i
s not
dependent
on t
he se
t
ract
a r
e
str
etche d by the i
ng est
ion o f processes al
one.
P eopl
e who have
ha d
f
o od,
vaga l
sensory n erves i
n t
he i
r mu scleth ei
r
s t
oma chs
remo ved,
f
or
me di
cal
l
aye r
s ,
which act
as `str
etch recep t
o r s',
r easons,
sti
l
l
e xper
ience
sati
ety
sends
signal
s
of sati
e t
y t
o
the brain. t
h er
efore
ch emical
messengers,
must
al
so
p l
ay
an
import
a nt
r
ole
in
sati
ati
on.
CCK ­
seems t
o be
the
ho r
mo ne
associ
ated wi
th
sat
iet
y.
It
do es
the
opp osi
te of
GH RELIN.
A s
food
passes
from the
stoma ch t
o t
he sma l
l
i
ntest
ine
CCK
is
released.
This sends
me ssages t
o t
he
br
ain
to inhi
bit
eat
ing
.
Lept
in
­ Reduces NPY
a nd
high l
evel
s of
Ma yer
a nd Thomas f
ound
that
t
rauma
to
or
i
ncreased
appeti
te a
decli
ne
in
lept
in
is tumo ur
s of
t
he VMH
can
cause
associ
ated wit
h a
loss of
f
a t
cel
ls
& i
ncreases our
appet
it
e
h yper
ph agia
(over
eati
ng)
and
also
o besi
ty.
I
nsuli
n i
s a hor
mo ne
that
h el
ps remov e
glucose
f
rom the
b l
ood.
A n
a bsenc e
of i
nsuli
n can l
ead t
o
hi
gh bl
o od
glucose l
evels w hi
ch coul
d
then l
ead t
o
hyperphagi
a
and i
n hi
bit
ion
of
sa t
iet
y.
Bayl
is
e t
al
:
Tw o symme trical
l
esions were
ma de Very
sma l
l
s a mp l
e which onl
y use d
o ne
i
n t
he VMH of
8 ma l
e and 5f
ema l
e rat s.
Thei
r body br
ee d
of
rat s o
it
's not generali
sab l
e
weight
was l
a t
er
co mpared wit
h age
ma t
ched
cont
rols.
These r
ats wit
h l
e sions
in
th e VMH
­al
so t
hey're r
ats! Extrapol
ati
o n
issu es!
cause
h yper
p hagi
a and ob esi
ty so
the VMH must Other
ti
ssue s
surro unding t
he VMH might
pl
ay a
role
in
sa t
isf
acti
on. have
b een
d a ma ge d wh en
the l
es i
on s
were
create d
so i
t
mi gh t
not
nece ssari
ly
j
ust
be the
V MH t
h at
is i
nvolved.
Et
h i
cal
issues t
oo!
The bi
ologi
c a l
mo d el
cannot expl
a i
n
w hy
r
ats
w i
th
d ama ge t
o t
he i
r VMH
w i
l l
eat
more pr
o vi
d e d
the food
is
easil
y
accessi
ble.
Schacter
: 20 obese part
ici
pan t
s w ere
asked
to comp l
e t
e a
qu est
ionnair
e
b owl
of
nuts
next to
them,
to l
d t
o `
help
t
hems elves'
Half
t
he nuts were sh ell
ed (
no she l
l)
or
unshel
led (
w i t
h she l
l)
.
The cont
rol g r
ou p
a te
s i
milar
amo unt
s of
nut
s regardle ss
of w hether
they w er
e
shel
led
o r
un sh el
led
bu t
out
of
the
ob ese

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Sheet
5 08.
04.
2014
Eat
ing
Behavi
our
gr
oup ­
only
one
ate t
he
unshel
led
nut
s
(
w or
k was
requi
red)
.…read more

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