The bundle of nerves that controls the elephant’s trunk contains 400,000 neurons – a lot more than we expected – suggesting the trunk is incredibly sensitive
at the Bernstein Center for Computational Neuroscience in Berlin and his colleagues dissected the heads of three Asian elephants and five African bush elephants . All the animals had lived in zoos and died of natural causes or had been euthanised because of severe health problems.
The researchers also counted around 400,000 neurons in the main nerve coming out of the trigeminal ganglion. This was far more than they expected and only slightly less than the number of neurons they found in the elephant’s optic nerve. Optic nerves usually have far more neurons than nerves related to touch because the visual system is typically a lot more complicated.
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