Neurons

Dendrites are nerve fibres that receive nerve impulses and pass them towards a cell body The cell body contains the nucleus

Axons are surrounded by a myelin sheath which insulates the axon and increases the speed of impulse conduction from node to node

Mylenation continues from birth to adolescence As a result responses to stimuli in the first two years of life are not as rapid or as coordinated as those of an older child or adult Certain diseases destroy the myelin sheath causing a loss of coordination

Glial cells physically support neurons and produce the myelin sheath