PROPRIOCEPTORS
                                
          * automatic control
          * coordinated movements
          * central control vs. peripheral control
          * voluntary vs. involuntary 
          * muscle spindles
          * Golgi tendon organs

                         MUSCLE SPINDLE
          
          * Stretch receptors
               * extrafusal vs. intrafusal fibers
               * nuclear chain fibers
               * nuclear bag fibers

          Spindle innervation
               1.) Afferent (sensory) neurons
                    * primary type 1a afferent annulo-spiral endings 
                       dynamic stretch
                    * secondary type II afferent flower spray endings 
                       static stretch

               2.) Efferent (motor) innervation
                    * gamma motor neuron (fusiform)
                    * gamma drive & gamma bias
                    * alpha - gamma co-activation
          
          * external vs. internal stretch
          * reciprocal inhibition


                       GOLGI TENDON ORGAN

          * Musculotendinous junction
          * Tension receptors
          * Type 1b afferent neuron
          * Gamma stimulation
          * Static response
          * Dynamic response
          * Lengthening reaction
          * Autogenic inhibition