Neural Construct
Thinking in terms of the energy-flow model, you could consider the entire brain as a neural construct in its own right. The energy of a nerve impulse enters the brain, flows through myriad branching channels and eventually flows out via motor nerves. But if we want to discuss the brain in more detail, we can try to identify smaller neural constructs that perform more specifically defined tasks.
A memory record is a neural construct. It's a collection of connected nerves that produce a particular output when they get an input stimulus. And the output tends to be analogous to the sensory input that originally led to formation of that neural construct.
For example, if you hear me say "three," you can form a short-term memory construct of that experience. Then if someone asks what number I said, your brain can stimulate that memory construct again, which produces motor output in your body to the effect that you might say "Three" out loud with your mouth.
A goal is a neural construct that specifies conditions for fulfillment. Neural energy flows entering the goal construct flow through the goal construct and then toward either the pain or pleasure centers, depending on whether the goal conditions are satisfied or not.
A strategy is a neural construct that acts like a subgoal leading up to some higher goal.
A question is a neural construct that causes the formation of a belief.
A belief is a neural construct that takes its input from a question and tends to produce output in the form of an assertion.