Question

what is function of nissel granules in nervous system

Answer 1

  It is also called tigroid body, found in neurons.it was named after Franz Nissl, German neurologist. 

Function: 1).These granules are rough endoplasmic reticulum (with ribosomes) and are the site of protein synthesis. 
2).Nissl bodies show changes under various physiological conditions and in pathological conditions they may dissolve and disappear (karyolysis)....

Answer 2

The main function of Nissl bodies within neurons is to aid in the production and dispersal of chemical substances such as proteins and peptides, as illustrated by Richard F. Thompson in his book "The Brain: A Neuroscience Primer." The structure of Nissl bodies makes them particularly adept at protein synthesis, an essential cellular process within a neuron.