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بسم الله الرحمن الرحيم. Control of Motor Movement. Dr.Mohammed Sharique Ahmed Quadri Assistant Professor Department Basic Medical Sciences Division of Physiology Faculty of Medicine Almaarefa Colleges. Control of Motor Movement. 3 levels of input control motor-neuron output

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control of motor movement

بسم الله الرحمن الرحيم

Control of Motor Movement

Dr.MohammedSharique Ahmed Quadri

Assistant Professor

Department Basic Medical Sciences

Division of Physiology

Faculty of Medicine

Almaarefa Colleges

control of motor movement1
Control of Motor Movement
  • 3 levels of input control motor-neuron output
    • Input from afferent neurons
    • Input from primary motor cortex
    • Input from brain stem
slide7

Length monitoring system

Tension monitoring system

muscle spindle structure
Muscle Spindle Structure
  • Consist of collections of specialized muscle fibers known as intrafusal fibers
    • Lie within spindle-shaped connective tissue capsules parallel to extrafusal fibers
    • Each spindle has its own private efferent and afferent nerve supply
    • Play key role in stretch reflex
stretch reflex
Stretch Reflex
  • Primary purpose is to resist tendency for passive stretch of extensor muscles by gravitational forces when person is standing upright
  • Classic example is patellar tendon, or knee-jerk reflex
references
References
  • Human physiology by Lauralee Sherwood, 7th edition
  • Text book physiology by Guyton &Hall,12th edition
  • Text book of physiology by Linda .s contanzo,third edition