It is a monosynaptic reflex which provides automatic regulation of skeletal muscle length.

Markers which are opaque to X-rays can allow simultaneous tracking of muscle length.

Flexibility varies between individuals, particularly in terms of differences in muscle length of multi-joint muscles.

This results in a reduction in baseline ciliary muscle length that is associated with both lens growth and increasing age.

They observed that this enhancement was greater at short muscle lengths.

Therefore tension changes as well as muscle length.

This gives them the ability to monitor muscle length with precision.

Properties of muscle change as the muscle length itself changes, making mechanical models difficult to create and understand.

They are non-adapting, meaning that even when there is no change in muscle length, they keep responding to stimuli.

These programs may include general muscle stretching to maintain muscle length and a person's range of motion.