a

Health Testing: The BAER Test

my name is dr. Ellis Loew and I'm a

physiologist in the vet College at

Cornell University in New York there are

defects that occur in the pathways

between the ear and the brain and if

those defects are present then the

animal is deaf most of these are

congenital so they're there during

development something goes wrong and the

animals are born deaf however you can't

tell necessarily that they're deaf

simply from their behavior when they're

just little pups so many years ago a

test was developed originally for humans

that basically measures the electrical

response of the ear and the early brain

centers when you give a stimulus so the

stimulus we use is up click you may be

able to hear that okay and every time

that clicks it stimulates the cells in

the inner ear they fire nerve impulses

that travel along a nerve to another

group of cells they fire pass that

information to another group of cells

and daisy chains its way along these

brain impulses are these nerve impulses

travel along and if everything is fine

what you get is a serie a series of

waves I think you already saw what they

look like each one of these waves

corresponds to that information

traveling along the nerve pathway if you

find that the animal has some congenital

defect you don't see those waves at all

but she gets a flatline and one of the

things that can happen it can be both

ear so it could just be one ear okay so

this is particularly helpful in

differentiating between you know a dog

that doesn't seem to respond really well

versus one that has only one side

functioning versus normal for most of

the people who do the test it's very

inexpensive the animal is not an

anesthetized

it's not even sedated and the owners

with the animal all the time and it's

essentially painless

do any number of dogs this quick test

you