We know that, for example, during brain surgery, electrical stimulation in certain parts of the cortex is sufficient for experience, and result in reportable experiences in human subjects.
We also know that action potentials are not sufficient to cause experience when they occur in other parts of the body. For example, as far as I know, humans are not aware of action-potential-caused insulin release in the pancreatic cells.
Further we know that mechanical stimulation of the fingers is converted to action potential trains, then relayed via interneurons, and is subsequently reported as touch. The situation is similar with other senses.
But, are there any examples of reportable experience without preceding action potentials? In other words, are there any cases of experience that is not correlated with electrical activity?
I'm interested because my deeper question is "Does all qualia result from action potentials?"