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Neuromuscular Control of Movement

Neuromuscular Control of Movement. Organization of Brain Motor Centers. The -Motor Neuron. Innervates skeletal muscle Receives input from higher centers Receives sensory input from muscle stretch and tension receptors. Motor Unit. The -Motor Neuron. All or none Size principle.

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Neuromuscular Control of Movement

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  1. Neuromuscular Control of Movement

  2. Organization of Brain Motor Centers

  3. The -Motor Neuron • Innervates skeletal muscle • Receives input from higher centers • Receives sensory input from muscle stretch and tension receptors

  4. Motor Unit

  5. The -Motor Neuron • All or none • Size principle

  6. Motor Unit

  7. Motor Unit

  8. Motor Unit • The ratio of nerves to muscle fiber is specific to a motor unit and defined by the task. Fine movements (focusing eyes) Gross movements (muscles involved in jumping)

  9. Motor Unit

  10. Motor Unit

  11. Muscle Recruitment • Training • In the lab!

  12. Motor Unit Stim Freq Large Motor Unit, Brief Contraction Time Small Motor Unit, Long Contraction Time

  13. Neuromuscular Junction

  14. Muscle Sensors • Allow for fine control and adjustments of muscle movements. • Protect musculoskeletal system from injury.

  15. Fine Control of Motor Movements

  16. Muscle Spindle

  17. Golgi Tendon Organ

  18. Chemical Feedback Control of Breathing

  19. “Muscle Memory”

  20. “Muscle Memory”

  21. “Muscle Memory”

  22. “Muscle Memory” is a form of Neural Memory

  23. Spinal Cord Autonomy

  24. Nerve determines Muscle Characteristics

  25. Nerve determines Muscle Characteristics S F S F Sc Fc mitochondrial  -glycerolphosphate-dehydrogenase

  26. Nerve determines Muscle Characteristics Stimulation Frequency Soleus by FDL Nerve S F S F Soleus by Soleus Nerve Sc Fc FDL by Soleus Nerve FDL by FDL Nerve mitochondrial  -glycerolphosphate-dehydrogenase

  27. Training the Motor Unit?

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