SNIP measures contextual citation impact by weighting citations based on the total number of citations in a subject field.
SJR is a prestige metric based on the idea that not all citations are the same. SJR uses a similar algorithm as the Google page rank; it provides a quantitative and a qualitative measure of the journal’s impact.
The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years.
© Thomson Reuters Journal Citation Reports 2015
To calculate the five year Impact Factor, citations are counted in 2014 to the previous five years and divided by the source items published in the previous five years.
© Journal Citation Reports 2015, Published by Thomson Reuters
For the last fifteen years, Neuron has established itself as one of the most influential and relied upon journals in the field of neuroscience. The editors embrace interdisciplinary strategies which integrate biophysical, cellular, developmental, and molecular approaches with a systems approach to sensory, motor, and higher-order cognitive functions. Neuron serves as one of the premier intellectual forums of the entire neuroscience community.
Submitted papers are reviewed for both technical excellence and general interest; those papers that are of general interest for the field as a whole are published within 10 weeks. Neuron also includes minireviews, reviews, and neurotechniques, which keep readers abreast of all developments in neuroscience, as well as announcements for positions available and forthcoming conferences.
Neuron website to find out more - http://www.neuron.org.