The general salary range can be from $35, 000 to $100,000 annually, depending on certif â¦ ication, etc. The hours involved per week can also vary from a normal 40 hours to 60 plus hours weekly, which will also impact how much per hour they make.
Neck spasm is a sudden and involuntary contraction, or uncontrollable tightening and shaking, of a muscle in response to strain, overuse, weakness, or muscle pain related to injury or a disorder.In some conditions, such as cervical dystonia, the spasm may cause your head to turn or to jerk.eck spasm is a sudden and involuntary contraction, or uncontrollable tightening and shaking, of a muscle in response to strain, overuse, weakness, or muscle pain related to injury or a disorder.
Causes of Muscle Spasms. Muscle spasms in the back can often be caused by a twisting or strain on one of the back muscles, which in turn causes involuntary muscle contractions. Although this often occurs when tense, tight back muscles are present, it can happen in any circumstance.s a result of the contraction people often complain of having symptoms of either a locked back, or a knot in their back. Among the most common causes of muscle spasms in the back... 1  a sneeze or cough. 2  lifting heavy objects. 3  incorrect sitting posture. 4  muscle overuse, or injury. 5  dehydration.