1. Sport Books Publisher1 Information Processing in Motor Learning Chapter 10

2. Sport Books Publisher2 Outline Structure and function of the nervous system Information processing and making decisions Feedback in movement control Factors affecting information processing

3. Sport Books Publisher3 Structure and Function of the Nervous System

4. Sport Books Publisher4 CNS Control center PNS Connects CNS with the rest of the body

5. Sport Books Publisher5 The Neuron and Its Function

6. Sport Books Publisher6 Neuron Nerve cell The fundamental functional and structural unit of the nervous system Allows information to travel throughout the body to various destinations

7. Sport Books Publisher7 Receptive Segment Transmissive Segment Conductive Segment Cell Body Nodes of Ranvier Myelin sheath Motor end plate Dendrites: receive message Terminal ending on muscle: sends message to adjacent neuron Axon: transmits message to terminal ending

8. Sport Books Publisher8 Myelin sheath: fatty covering or insulator Skipping of the impulse allows faster conduction

9. Sport Books Publisher9 Types of Neurons Afferent neurons Sensory Carry signals to the brain Efferent neurons Motor Carry signals from the brain CNS tissue cross-section Interneurons Originate and terminate in CNS Connect afferent and efferent neurons in CNS

10. Sport Books Publisher10 Types of Neurons

11. Sport Books Publisher11 The Neuron’s Function Receptive segment (dendrites) –Receives continuous synaptic input (chemical) from other neurons Conductive segment (axon) –Conduction of neural information in the form of nerve impulses (electrical) Transmissive segment (axon terminals) –Converts electrical nerve impulse to chemical form (neurotransmitter) and sends it off to synapse Receptive Transmissive Conductive

12. Sport Books Publisher12 Neural Impulses Transport the information necessary for all activities we carry out The language of the nervous system Relay of impulse within neuron: Rest: polarization Stimulus: depolarization Membrane potential = -70 mV Rest: polarization Action Potential Resting Potential Stimulus (mV) +50 0 -50 -100 +40 mV