What are some credible conferences and journals in computational neuroscience? I have a background in computer science, and I wish to introduce cognitive sciences to myself, particularly from a computational/mathematical perspective. My motivation for doing this artificial general intelligence research at a later stage. 

So far I only know of a few conferences that accept papers in the area of computational neuroscience &amp; machine learning, namely Cosyne, NIPS, ICML, and ICLR that accept papers in computational neuro. I guess that latter two (ICLR and ICML) accept papers which find some significance in ML. As for journals, I do not even know where to begin.
Adding to what was already mentioned, there are several "Frontiers" journals:


Frontiers in Neuroscience
Frontiers in Neural Circuits
Frontiers in Computational Neuroscience
Frontiers in Synaptic Neuroscience


Then there are also several rather experimental journals that also sometimes publish computational papers, such as:


Elife
The Journal of Neuroscience
Neuron
European Journal of Neuroscience
PNAS (proceedings of the National Acadamy of Sciences)
Cerebral Cortex
Hippocampus


Another review journal would Annual Review of Neuroscience. I think Nature Neuroscience was also not mentioned yet but is very reputable. Some older (but classical) papers might even be in Physical Review Letters. Finally, there are many preprints to find on http://www.biorxiv.org/collection/neuroscience and https://arxiv.org/list/q-bio.NC/new.

I think it's worth mentioning that, as far as I know, conference papers are far less important in the field of Neuroscience than compared to Machine Learning.