Sublime

the investigatory reflex. He understood that in order to survive, any animal needs to be acutely aware of immediate changes to its environment, investigating and evaluating these differences for the dangers or opportunities

As the muscle spindle senses a muscle being stretched to its end range, it sends a message to the spinal cord. The CNS reacts with a motor neuron telling the muscle to contract to avoid being overstretched and possibly injured. This is known as the stretch reflex, or myotatic (which means muscle tension) reflex.