Neurons

Neurons as information processing units, meaning that the circuits formed by neurons support logical and mathematical operations. In this view, the brain is a computer. But it was not always so.
In the 17th Century, the brain was mechanical, thought to operate in a manner similar to powered and geared machines like engines and clocks, which were at the forefront of innovation at the time. And long before the brain was mechanical, it was hydraulic.
Units in Neuromorphic hardware are called Neurons.