Communication of information between neurons is accomplished by movement of chemicals across a small gap called the synapse. Chemicals, called neurotransmitters, are released from one neuron at the presynaptic nerve terminal.
Follow Trail 12 until it runs back into trail 1 and familiar sights and then you are only about 200 yards from the great Cumberland Falls. To the best of my guessing ability I would say this loop was about 8.5 miles long which took us about 3 hours and 45 minutes.
Three overlooks give different views of the Great Falls. All are within a five to ten minute walk from the Visitor Center. Access to the Falls is by walking only. Overlooks 2 and 3 are handicap and stroller accessible. For your safety, do not climb or go beyond the fences.