Let's say we have a single-layer feed forward neural network with k inputs and one output. It calculates a function from $\lbrace 0,1\rbrace ^{n}\rightarrow\lbrace 0,1\rbrace $, it's fairly easy to see that this has at least the same computational power as $AC^0$. Just for fun, we'll call the set of functions computable by a single layer neural network "$Neural$".
It seems, however, that it might have more computational power than $AC^0$ alone.
So ... is $Neural \subseteq AC^0$$AC^0 \subseteq Neural$ or is $Neural = AC^0$? Also has this kind of complexity class been studied before?