Here’s what fish brainwaves look like | Toronto Star

Tuesday, February 12, 2013
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13/02/12 23:44

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Here’s what fish brainwaves look like

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Japanese scientists create technology to see neural processes at work on fish seeking
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By: Noor Javed News reporter, Published on Mon Feb 04 2013

The zebrafish sits watching its prey. As its eyes track themovements of its soon-to-be dinner — researchers in Japanare able to watch those eyes send signals to the brain in realtime.
Researchers at Japan’s National Institute of Genetics in
Shizuoka Prefecture used zebrafish — which have atranslucent head — and developed an extremely sensitive
fluorescent probe that can detect neuronal activity. Scientist
hope the research will allow them to apply the research toother animals and even humans.

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shopping scenes“Fish and humans have fundamental brain functions incommon: vision, hearing, learning and memory, fear
response, aggression etc.,” said researcher Koichi Kawakami, in an email. “Thus, byanalyzing the fish brain, we can get more insights into fundamental neural circuits in
the human brain.”
The research, which appears in the journal Current Biology, involved the scientists
creating a genetically modified fish that expressed a calcium sensor (called GCaMP) in
the brain. The calcium sensor shines when neurons are activated and firing. The
researchers found that when the paramecium (dinner) was swimming in the water near
the fish, its eyes transferred signals to the brain — sending off a wave of neurons
relating to neurological activity linked to visual processing. When the paramecium
didn’t move, there was no brain activity. The scientists were also able to capture thebrain activity when the fish were able to swim near the prey and when they were
stationary.

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Here’s what fish brainwaves look like | Toronto Star

13/02/12 23:44“Our work is the first demonstration of the brain activities in real time, in an intact
animal, during animal’s natural behaviour, said Kawakami. “We successfully madeinvisibles visible.”
The immediate goal of the group is to map the neural activity in other areas of thebrain including the areas that may control movement and behaviour.

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