Its know that a number of chemical and physical factors can act to impair impulse propagation (action potentials). Two such examples are extreme cold temperatures and unceasing pressure.
A - Your fingers going numb a hot summer day while holding a glass of iced-cold water
B - Your foot would go to sleep if you sat on it for the entirety of game 3 NBA finals
Can someone please explain to me what happens in each scenario? Thanks.