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Information Processing in Motor Learning Chapter 10 Sport Books Publisher 1 Outline Structure and function of the nervous system Information processing and making decisions Feedback in movement control Factors affecting information processing Sport Books Publisher 2 Structure and Function of the Nervous System Sport Books Publisher 3 CNS Control center PNS Connects CNS with the rest of the body Sport Books Publisher 4 The Neuron and Its Function Sport Books Publisher 5 Neuron Nerve cell The fundamental functional and structural unit of the nervous system Allows information to travel throughout the body to various destinations Sport Books Publisher 6 Receptive Segment Cell Body Dendrites: receive message Myelin sheath Conductive Segment Axon: Nodes of Ranvier Transmissive Segment transmits message to terminal ending Terminal ending on muscle: sends message to adjacent neuron Sport Books Publisher Motor end plate 7 Myelin sheath: fatty covering or insulator Skipping of the impulse allows faster conduction Sport Books Publisher 8 Types of Neurons Afferent neurons Sensory Carry signals to the brain Interneurons Originate and terminate in CNS Connect afferent and efferent neurons in CNS CNS tissue cross-section Efferent neurons Motor Carry signals from the brain Sport Books Publisher 9 Types of Neurons Sport Books Publisher 10 The Neuron’s Function Receptive 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) Conductive Transmissive segment (axon terminals) – Converts electrical nerve impulse to chemical form (neurotransmitter) and sends it off to synapse Transmissive Sport Books Publisher 11 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 Membrane potential = -70 mV Stimulus: depolarization Rest: polarization (mV) +50 Action Potential +40 mV 0 -50 Resting Potential -100 Sport Books Publisher Stimulus 12