Penny's EMOTIONAL responses originate in the
primitive portion of brain, the amygdala.
The Big Bang Theory Season 1, Episode 17
You got EMOTIONAL
when that lab monkey died.
The Big Bang Theory Season 9, Episode 19
Her missing you,
is an EMOTIONAL state you find desirable.
The Big Bang Theory Season 2, Episode 23
Let's go over our EMOTIONAL responses
one last time.
The Big Bang Theory Season 6, Episode 20
Of course, yeah. Emotional chafing.
The Big Bang Theory Season 1, Episode 3