Neurons, also called nerve cells, are the cells responsible for receiving sensory information from the external world, sending motor commands to our muscles, and transforming and relaying electrical signals at every stage in between. We each have roughly 100 billion neurons.Queensland Brain Institute. (n.d.). What is a neuron?. [online] Available at: https://qbi.uq.edu.au/brain/brain-anatomy/what-neuron [Accessed 22 Nov. 2018].