|It is also called as nerve cell. Neurons are connected to each other to form a neural network. Signals between the neurons occur via synapse. Neuron consists of nucleus, dendrites, axon, axon terminals. Axon is covered by myelin sheath but not continuously, places where myelin sheath covering is absent is called as nodes of ranvier. Neurons that simply signals the other neuron are called as interneurons.
The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information.