1 Perhaps the most important distinction is between neurons with and neurons without long axons. 2  The long-axoned cells, called principal neurons, transmit information over long distances from one brain region to another (Sheperd,1979). 3  Principal neurons provide the pathways of communication within the nervous system.
Training is the process of being conditioned or taught to do something, or is the process of learning and being conditioned. When you teach a new employee how the business works, this is an example of training.
A trainee is commonly known as an individual taking part in a trainee program or a graduate program within a company after having graduated from university or college. A trainee is an official employee of the firm that is being trained to the job he/she was originally hired for. Literally an employee in training.