Introduction 3. Discussion 3.1. What is the nature of mitochondrial movement in nerve axons? 3.2. What are the possible motors and tracks? 3.2. 1 Molecular motors for mitochondrial transport 3.2. 2 Two different cytoskeletal tracks for mitochondrial movement 3.3. How is movement regulated to support neuronal homeostasis? 3.3. 1 The coordination of mitochondrial motility behavior with axonal physiology 3.3. 2 Potential signals for controlling mitochondrial motility 3.4. What is the nature of mitochondrial “docking?” 3.5 Summary