µ±Ç°Î»ÖÃ: 100mdÊ×Ò³ > ҽѧ°æ > ҽѧ×ÊÁÏ > ×ÊÁÏÏÂÔØ2016 > ppt¿Î¼þÀà
񅧏:12893446
Éñ¾­ÉúÎïѧppt¿Î¼þ:7Éñ¾­ÏµÍ³¶ÔÔ˶¯µÄµ÷½Ú.ppt
http://www.100md.com
    ²Î¼û¸½¼þ(13328KB)¡£

    Central Nervous System Control of Movement

    XING, GUOGANG(ÐϹú¸Õ), MD. Ph.D.

    ±±¾©´óѧ Éñ¾­¿ÆѧÑо¿Ëù

    Neuroscience Research Institute, Peking University

    Email address: ggxing@bjmu.edu.cn

    Introduction

    * ÉúÃüÔÚÓÚÔ˶¯......

    * Ô˶¯ÊǶ¯Îïάϵ¸öÌåÉú´æºÍÖÖ×å·±ÑܵĻù±¾¹¦ÄÜÖ®Ò»

    How does a coordinated movement achieved ?

    The motor control hierarchy have three levels

    * The highest level- strategy

    > Represented by the association areas of neocortex and basal ganglia of the forebrain

    > Is concerned with strategy:

    ?a The goal of the movement and the movement strategy that best achieves the goal

    The motor control hierarchy have three levels

    * The middle level-tactics

    > Represented by the motor cortex and cerebellum

    > Is concerned with tactics

    - The sequences of muscle contractions

    ? Arranged in space and time

    ? Required to smoothly and accurately achieve the strategic goal

    The motor control hierarchy have three levels

    * The lowest level- execution

    > Represented by the brain stem and spinal cord

    > Is concerned with execution

    - Action of the motor neuron and interneuron pools that generate the goal-directed movement and make any necessary adjustments of posture

    Overview

    * ¼¹ËèÄÚµÄ"ÏÂÔ˶¯Éñ¾­Ôª(Lower neurons)?¡À¡ê?³ýÁËÊܵ½¼¹ËèÄÚ¾Ö²¿»·Â·µÄÓ°ÏìÍ⣬»¹Êܵ½´óÄÔƤ²ãÔ˶¯Çø¼°ÄÔ¸ÉÖÐÐí¶à"ÉÏÔ˶¯Éñ¾­Ôª(Upper neurons)?¡ÀµÄÖ§ÅäºÍЭµ÷

    * »ùµ×Éñ¾­½ÚºÍСÄÔÔòÏòÄÇЩÉÏÔ˶¯Éñ¾­ÔªÌṩijÖָоõ¡¢ÈÏÖª»ò¸ÐÐÔµÄÐÅÏ¢£¬Ê¹Ô˶¯¸ü¼Ó¾«È·ºÍЭµ÷

    ÿ

    Part 1

    Spinal Control of Movement

    Introduction

    * "running around like a chicken with its head cut off"

    * The rhythmic movements could be elicited in the hind legs of cats and dogs long after their spinal cords had been severed from the rest of the central nervous system

    -Charles Sherington & Graham Brown (English)

    - The importance of circuitry within the spinal cord for the coordinated control of movements

    Spinal circuitry control of movement

    Spinal motor neurons

    * Alpha motor neurons

    Innervate skeletal muscle (extrafusal muscle) ......

ÄúÏÖÔڲ鿴ÊÇÕªÒª½éÉÜÒ³£¬Ïê¼ûPPT¸½¼þ(13328KB)¡£