Are Myofascial And Muscular Pain the Same?
Muscle and myofascial pain are not really same. Muscular pain could be triggered by pain receptors overstimulation that are located in muscle fibers. Myofascial pain is a term commonly used to describe pain that has origin somewhere in muscle.
On the other hand, myofascial pain is a phenomenon in which your local pain is due to inflammation of tiny knots (trigger points) which give rise to pain. Sarcomere is the functional unit of muscle. Contracture of sarcomere leads to formation of trigger points. The pathophysiology of these trigger points is better described by endplate dysfunction.
The junction between nerve ending and muscle fiber is endplate. Energy crises or ischemia at endplate will induce release of pain sensitizing substances. Such substances will reduce and inhibit calcium reuptake into muscle fibers resulting in various circles of pain-spasm-pain.