Hidden Neuron, Hidden Layer Neuron
- In traditional feed-forward neural networks
, a hidden layer neuron
is a neuron whose output is connected to the inputs of other neurons and is therefor not visible as a network output (hence the term hidden layer).
In the context of a feed-forward network, a hidden layer neuron is a pre-synaptic
neuron because it is connected to other neurons in the network which are post-synaptic
in relation to its output. In feed-forward networks, neurons form layers, or slabs, which are connected to and from post- and pre- synaptic neurons. Such groupings of neurons that are themselves connected to other neurons are sometimes (traditionally) called hidden layers or hidden layer nuerons.
Using the more general terms: "post synaptic
" and "pre-synaptic
" allows any given parties to a connection, or set of connections, to be discussed without inadvertently dragging the entire network into the discussion.