What effect do contract/relax techniques have on the nervous system?

• A. They increase arousal
• B. They manipulate it to change muscle tone and promote relaxation
• C. They decrease proprioceptive feedback
• D. They strengthen reflex pathways

Answer: (B)

The main idea is that contract/relax techniques manipulate the nervous system to change muscle tone and promote relaxation. When you briefly contract the target muscle, the Golgi tendon organ senses the increased tension and triggers autogenic inhibition, reducing the alpha motor neuron drive to that muscle. This temporary inhibition makes the muscle more compliant, so a subsequent passive stretch can be deeper and easier to achieve. As relaxation follows, proprioceptive input from the muscle spindles and other receptors helps recalibrate neuromuscular control, further reducing excessive tone and improving range of motion. In short, these techniques use a controlled neural input to dampen overactive muscle activity and facilitate relaxation and lengthening. They are not about increasing arousal, decreasing proprioception, or strengthening reflex pathways.