What is the foundational premise of Chestnut regarding chronic decreased range of motion?

The foundational premise of Chestnut regarding chronic decreased range of motion is that it results in pathologic neuroplastic changes and decreased proprioceptive input into the central nervous system (CNS). Chronic decrease in range of motion can lead to alterations in normal neurological function, as the body adapts to prolonged immobility or restricted movement. This adaptation can create changes in the neural pathways, resulting in what is known as pathologic neuroplasticity.

When range of motion is reduced, the normal feedback loop between the body and the brain, particularly related to proprioception (the body's ability to sense its position in space), is disrupted. This diminished proprioceptive input can affect coordination, balance, and overall motor control, leading to further complications. Such neuroplastic changes can create a cycle where the lack of movement exacerbates the dysfunction, contributing to persistent pain or other neuromusculoskeletal issues.

Thus, the understanding that chronic decreased range of motion negatively impacts proprioceptive input and leads to maladaptive changes in the nervous system is a key concept in addressing and treating musculoskeletal conditions.