The science of laughter

everybody loves to laugh in fact humans

laugh an average of 17 times per day but

what is laughter what makes it happen

and how does it affect us Webster's

dictionary defines laughter as the

expression of mirth pleasure derision or

nervousness with a vocal expulsion of

air from the lungs accompanied by

characteristic facial and bodily

movements okay so what makes this vocal

expulsion occur according to the

American Medical Association it's a

neural reaction generated by a synaptic

relation in the reticular b.i science

reporter Tonya Lewis here's how it

actually works the frontal lobe of the

brain is responsible for emotional

responses the left side of the brain is

responsible for interpreting the words

and the structure of a joke

the right side is responsible for

identifying what makes it funny

and the limbic system is also important

this area includes the amygdala and the

hippocampus and is involved in basic

responses like fear or hunger the motor

areas of the brain become active and

these are the areas that actually

produce the Chuckle or the physical

action of laughing Thank You Tanya

humans are one of the only species on

the planet that laughs although some

scientists have observed laughter in

primates during tickling it hasn't been

definitively confirmed the best thing

about laughter it's good for you

a study by the University of Maryland

linked laughter to the healthy function

of blood vessels that could lower the

chance of a heart attack

laughter boosts your heart rate and

increases the production of antibodies

that strengthen your immune system and

according to a Princeton study laughing

is contagious the sound of it provokes

more laughter that's why sitcoms use

laugh tracks the sound of laughter

subconsciously makes us think that

whatever is happening is funny laughing

is healthy we need it to survive

so keep laughing it could save your life