The winning brainwave
If you could create an experiment to learn more about the human brain, what would you investigate? We posed this question in our Big Brain Competition last year, as part of the Brain Diaries exhibition with Oxford Neuroscience, and received a whopping 800 entries!
For the competition, Oxford University neuroscientists offered people the chance to use the state-of-the-art MRI scanner at Wellcome Centre For Integrative Neuroimaging at the John Radcliffe Hospital to investigate a burning question about the brain. We had ideas from the young and old, and by visitors from all around the world suggesting brilliant questions and some fascinating experiments.
To judge all the ideas, entries were split into categories: feasible experiments, unfeasible experiments, under 18s, and questions about the brain. WIN researchers compiled a long-list for each, which was ranked by a panel of neuroscientists and people from the museum to reach the eventual winners.
Sadly, only one experiment could be carried out, so an overall winner was picked from the ‘feasible experiments’ category. The winning experiment was suggested by Richard Harrow, who wanted to understand how the brain identifies voices.
A person is put in the MRI scanner with headphones on. They are shown a photo of a person familiar to them, either a friend, family member or celebrity. Then, in their headphones they are played the voice of a person, but the voice is either sped up or slowed down.
They are required to say whether the face on the photo matches the voice they have heard. What happens in the brain when this confusion of audio and visual information is occurring? Will the brain find a way to identify the vocal signature of the voice, even if distorted, and be able to say with conviction if the photo and the voice are a match?
– Richard Harrow, winning competition idea
On the day of the experiment, the winners and runners-up headed over to the WIN Centre to watch Richard’s winning experiment being conducted. The experiment was streamed live by Oxford Sparks and we had a clear result from the test, as neuroscientist Dr Holly Bridge explains:
The scans show that when you’re getting information that corresponds in both your auditory and your visual system you get a boost in your brain activity. We can detect that the brain does respond differently depending on whether or not you can match the face with the voice; it clearly has a lot to do with expectation.
The scientists also wanted to answer as many of the other great brain questions as possible. So a series of articles picks out some of the broad themes in the competition ideas, including lifestyle, muscle memory and stress. Researchers also answered more big questions live on Facebook during this year’s Brain Awareness Week.
Thank you to everyone who suggested an experiment or asked a question; it made for a fascinating conclusion to the Brain Diaries exhibition, and has definitely increased the amount of brain activity from staff across the Museum and Oxford Neuroscience… if only there was an MRI scanner for us to see it!
You can still get involved with the Big Brain Competition by trying the winning experiment at home.