The sections in this article are:
Tendon Organs
Structure of Muscle Spindles
Classic View
Recognition of Motor Duality
Subdivision of Nuclear‐Bag Fibers
Functional Properties of Primary and Secondary Spindle Afferent Endings
Different Responses to Various Stimuli
Mode of Summation of Signal Components
Amplitude Nonlinearity
Linear Responses to Sinusoidal Stretching
Assessment
Possible Intermediate Endings
Motor Supply to Muscle Spindle
Gamma Motor Axons
Delimitation of Static and Dynamic Fusimotor Axons
Intrafusal Destination of Static and Dynamic Axons
Properties of Intrafusal Muscle Fibers
Beta or Skeletofusimotor Axons
Possible Functional Roles for the Fusimotor System
Maintenance of Sensitivity
Central Regulation of Spindle Sensitivity (Parameter Control)
Fusimotor Biasing and Suggested Role as Servo Input
Assessment
Summary
Structure
Functional Differences Between Primary and Secondary Endings
Static and Dynamic Fusimotor Axons
Possible Functional Roles for the Fusimotor System