The musculofascial skeletal system receives most of the efferent (out flow) from the central nervous systems; the largest portion of this efferent discharge exists in the spinal cord via the ventral roots to the muscles. The musculofascial skeletal system is also the source of much of the widespread, continuous, and variable sensory input to the central nervous system. The sensory feedback relayed from receptors in myofascial, visceral, articular components, and other, enters the spinal cord by dorsal roots. The muscle is the focus of dysfunctional movement, when considering the hypertonicity of protective muscle spasm and spasticity. The muscle is active, self-energized, independent in motion and capable of developing widely variable and rapidly changing forces. The muscles produce motion when stimulated by nerve impulses and enables them to contract. Because muscles can only pull not push, they are arranged in opposition to each other. This means that the movement produced by a group of muscles can always by reversed by its opposing group.

A fibrous membrane covering, supporting and separating muscles is called fascia which forms the soft frame of the body. It unites the skin with the underlying tissue. Fascia envelopes the muscles, nerves and blood vessels which gives cohesion and order to the myriad components of the body. It allows movements between adjacent structures and reduces the effects of pressure and friction. The fasciae increase the side resistance during muscular contraction and prevent displacement of the muscle to the side. It is rich in nerve endings and has the ability to contract and stretch elastically. It surrounds the muscles, separates them from one another and is used by muscles in their attachment to bones is called tendon. Because of its various functions, fascia is a vital component in the bio-mechanical (biochemical) efficiency of the body. Posture, emotional and mechanical stress or injury can produce changes in the fascia which may become chronic.

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