Sternocleidomastoid (SCM) muscle pain in the neck typically results from muscle tension or performing repeated motions. It can also occur with certain health conditions, such as asthma and pneumonia.

Torticollis is a condition of the neck muscles that causes the head to tilt down. The term comes from two Latin words: tortus, which means twisted, and collum, which means neck. Sometimes it’s called ...

The neuromuscular junction (NMJ) exhibits high morphological and functional plasticity. In the mature muscle, the relative levels of physical activity are the major determinants of NMJ function.