Fear conditioning in humans modulates skin conductance
responses
Skin conductance response
(SCR) is a quantitative
psychophysiological measure
that has been correlated with
emotional arousal.  It is
essentially, a measure of how
sweaty your palms are, and it
is more commonly known as
the lie detector test.
Patients with distinct lesions in
the amygdala and/or the
hippocampus have specific
deficits in conditioning skin
conductance responses.