Sneezing in the light is caused by brain dysfunction

I wonder if you have such a friend around you.

Or maybe you are one of them.

That is, I sneeze as soon as I get out of the sun.

People often don’t think there’s anything special.

Sometimes this is attributed to

Staying indoors or in the shade for too long,

As soon as the sun shines, the cold air comes out.

Or an allergy to sunlight.

But is it really like this?

actually,

This phenomenon of sneezing when seeing bright light

There is a scientific definition.

It's called the light sneeze reflex.

Like looking up at the sun

Or from the shade into the sunlight,

I can't help sneezing.

(Copyrighted image from the gallery, no permission to reprint)

The scientific name of the optical sneeze reflex is

Compulsive disorder autosomal dominant

Photoreceptor irritation syndrome,

ACHOO for short.

Oh, that’s right, it’s a—qio—.

After hearing this scientific name, you will understand.

Sneezing when you see the sun may be related to genes.

It's not about allergies, and it's hereditary.

If one of the parents has this condition,

Then their children have a 50% chance of

It will also have this trait.

But why do we sneeze when we see bright light?

In fact, the relevant discussion has been going on for a long time.

Everyone was arguing.

The most credible one at present is

Modern neurobiological explanation.

Let's talk about this first.

How is sneezing accomplished?

When the nasal mucosa is irritated by foreign matter,

For example, cold air, dust,

This stimulation will upload information through the trigeminal nerve,

Report to the brain.

The brain receives information about nasal irritation.

The command will be issued immediately.

Use the sneeze plan to spray out foreign objects.

When we encounter strong light, such as looking at the sun,

The optic nerve transmits strong light signals to the brain.

The brain will issue instructions such as shrinking the pupils and squinting the eyes.

To protect eyes from irritation and damage.

Normally, these two pathways go their separate ways.

Do not interfere with each other.

But the trigeminal nerve and the optic nerve are very close.

Sometimes the line gets "crossed" when strong light shines into the eyes.

Some of the signals that were supposed to go to the optic nerve go the wrong way.

I accidentally sent it to the trigeminal nerve.

The trigeminal nerve is very responsible and immediately "lies about military intelligence".

So... I sneezed.

But don't be nervous.

This kind of "stringing" is not a disease.

There is no harm to the body.

It can be said that it is just an ordinary biological genetic phenomenon.

If you don't have any special job,

It basically has no impact on your life.

But you still need to be more careful when driving.

Especially when driving out of a poorly lit tunnel.

A moment of bright light

May trigger the driver's optical sneeze reflex,

When you sneeze,

We close our eyes unconsciously.

Even brief periods of eye closure can be dangerous.

Because the brain sends a sneeze command,

First, let the lungs inhale, then let the chest muscles contract violently.

Creates greater pressure,

The air suddenly blew out from the nostrils and mouth.

Achieve the effect of expelling foreign objects in an instant.

During this process, the facial muscles must cooperate with the contraction.

These include the orbicularis oculi muscle, which controls eye closure.

It can be said that closing the eyes is achieved by coordinating the contraction of the main muscles.

Contributed to a good sneeze.

(Copyrighted image from the gallery, no permission to reprint)

And sneezing

Reflex behavior completed by the coordination of nerves and muscles.

It cannot be controlled by humans themselves.

It's like a knee-jerk reaction.

So it is inevitable to close your eyes when you sneeze.

How do I know if I have this genetic defect?

Hey! It doesn’t matter whether you know it or not!

If you mind, just wear a pair of sunglasses.