Special Tactics Advanced Skills Training, Hurlburt Field, Fla. Advanced skills training is a 12-to-15-month program for newly assigned combat controller operators. AST produces mission-ready operators for the Air Force and U.S. Special Operations Command. The AST schedule is broken down into four phases: water, ground, employment and full mission profile.
Saltatory Conduction. As in un-myelinated axons, the first action potential in myelinated axons takes place at the initial segment of an axon and is generated by a threshold stimulus from the dendrites and cell body. Subsequent action potentials occur at the nodes of Ranvier, where the Na+ voltage-gated channels are located. Therefore, when nerve impulses travel down a myelinated axon, they appear to jump from node to node - in a process called saltatory conduction. Each nodal action potential is triggered by a threshold stimulus created by passive current from the previous node.
It is a long process (projection) extending far from the nerve cell body that carries nerve impulses from sensory receptors or sense organs toward the central nervous system. The opposite direction of neural activity is efferent conduction. In the nervous system there is a closed loop system of sensation, decision, and reactions. This process is carried out through the activity of afferent neurons (sensory neurons), interneurons, and efferent neurons (motor neurons).