the striated portions of the intrafusal fiber contract to keep the spindle taut at different muscle lengths. If the whole muscle is stretched, the muscle spindle is also stretched, triggering sensory nerve impulses on its nerve fiber. These sensory fibers synapse in the spinal chord with lower motor neurons leading back to the same muscle. Impulses triggered by stretch of the muscle spindle contract the skeletal muscle.
senses changes in muscle length
tension
Muscle of the hand.
muscle spindles
tension
They measure the rate of change of length of a muscle.
the Ia fibres of the muscle spindles
gamma motoneurons
they are located in knees.
muscle spindles
Golgi tendon Muscle spindles
muscle spindles
muscle spindles