How do satiety signals control meal
size?
Meal size tends to be more
biologically controlled than
meal timing, that depends
on numerous emotional
and social factors.
Satiety signals are probably
initially processed by the
nucleus of the solitary tract
(NTS), which receives
afferent input from the
vagus nerve and from
afferents passing into the
spinal cord from the upper
gastrointestinal tract.
Adiposity signals can
modulate the response to
satiety signals, either
indirectly through the
hypothalamic pathways we
have discussed, or directly,
since the NTS does have
some leptin receptors.