We can tell it feels good... scientists now think they know why.
Gentle stroking activates a type of neuron: the MRGPRB4+ neuron.
Researchers have confirmed that this neuron is found in all mammals.
Its activation is related to lower stress-responses.
The nerve endings of these neurons are widely spaced on skin...
...which is why only gentle stroking activates these neurons
Birds may also have these neurons...
...creating evolutionary connections across many species thought to be unrelated.
The reason why these neurons evolved is unclear.
Consider it nature's gift.
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