Neuro circuitry
Neurons do not function in isolation; they are organized into assembles or circuits that is in charge of processing specific kinds of information.Despite the varied arrangement of neural circuits according to the intended function, some features are characteristic of all such ensembles. The synaptic connections of a circuit are typically made of a dense tangle of dendrites, axons terminals, and glial cell processes that together forms the neuropil. Thereby, the neuropil between nerve cell bodies is the region where majority of the synaptic connectivity occurs. Nerve cells that brings information toward the central nervous system are called afferent neurons; nerve cells that bears information away from the brain or spinal cord are called efferent neurons. Nerve cells only participating in the local aspects of a circuit are called interneurons. These three classes—afferent neurons, efferent neurons, and interneurons can be considered the basic constituents of neural circuits.