Unit 2: Neurological Considerations for Movement Assignment 1. Which part of the nervous system carries signals to the muscles? 2. True or False. If a motor unit is Type I, then all of the muscle fibers in that unit are Type I. 3. True or False. All muscles have a mixture (although not equal) of all motor unit types. 4. Which type of motor unit is the most fatigue resistant? Which is the least fatigue resistant? 5. Can a Type IIa fiber change into a Type I fiber? 6. Order the following muscles from the greatest to least innervation ratio: tibialis anterior, lumbricals and gastrocnemius. 7. During a low intensity walk, which type of motor unit is activated? 8. If performing a high intensity exercise like a sprint, which motor units are activated? 9. What is the common name for an involuntary predictable response? 10. Provide an example for each. Category Type Example Monosynaptic Myotactic (Stretch) Reflex Flexor Reflex Cutaneous Reflex Propriospinal Crossed Extensor Reflex Tonic Neck Reflex Supraspinal Labyrinthine Righting 11. List the two primary proprioceptors and two tactile receptors of the musculoskeletal system