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Curious Cases

The Squeamish Swoon

Curious Cases

BBC

Science

4.84.1K Ratings

🗓️ 11 February 2016

⏱️ 13 minutes

🧾️ Download transcript

Summary

Science sleuths Hannah Fry and Adam Rutherford investigate the following question sent in by Philip Le Riche:

'Why do some people faint at the sight of blood, or a hypodermic needle, or even if they bash their funny bone? Does it serve any useful evolutionary purpose, or is just some kind of cerebral error condition?'

Adam is strapped onto a hospital tilt table in an attempt to make him blackout and Hannah receives an aromatic surprise.

Featuring consultant cardiologists Dr Nicholas Gall and Dr Adam Fitzpatrick and cardiac physiologist Shelley Dougherty.

If you have any scientific cases for the team to investigate please email: curiouscases@bbc.co.uk

Presenters: Hannah Fry & Adam Rutherford Producer: Michelle Martin.

Transcript

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0:00.0

Welcome to the podcast of the curious cases of Rutherford and Fry.

0:03.6

Episode four, the squeamish swoon.

0:06.6

Is another one about you?

0:08.1

I know, well, you get to do all the field work,

0:10.7

I get to have all of the episodes about me.

0:13.2

But the squeamish swoon is why you faint so easily

0:17.0

if I even mention gushing blood.

0:19.8

In many ways, this episode is about you enjoying torturing me

0:25.1

by bringing up images of deeply horrifying

0:28.8

so blood-based. No, I'm doing that.

0:31.1

The sound of blood gurgling from an open wound.

0:35.2

That's the problem here, is it? No, stop it. Don't like it.

0:43.6

Today's case is one which has perplexed medical science for centuries

0:47.8

and yet affects almost half of the population.

0:50.4

Yes, it was brought to us by the excellently named Philip Lourish.

0:54.2

He asks the following question.

0:56.0

Why do some people faint at the sight of blood

0:59.6

or a hypothermic needle or even if they bash their funny bone?

1:03.7

Does it serve any useful evolutionary purpose

1:06.4

or is it just some kind of cerebral error regards Philip?

1:10.2

Yes, why do we faint? What happens when we pass out?

1:13.9

This is what we'll be investigating in the case of the squeamish swoon.

...

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