Neck pain often arises from tight neck muscles that pull the neck vertebrae slightly out of alignment, called subluxation, which then impinge on sensory nerves entering the spine between these vertebrae. These sensory nerves relay that information back to the brain setting off the alarm in the form of pain.
Wrist Bending. Forward bending of your wrist is called flexion. This motion is needed for daily activities such as styling your hair, writing, getting dressed, using a screwdriver and lifting heavy objects. Normal wrist flexion is approximately 70 to 90 degrees.
In the case of the shoulder, forward flexion is the motion of the shoulder when lifting the arm in front of the body, such as to point at something in front of you. Range of motion is measured with the palm facing the side of the body and the arm straight. It is measured from neutral to the highest point the arm can be lifted over the head. Normal range of motion is 180 degrees. Extension. Extension is a shoulder motion that involves moving the arm behind the body, such as reaching into a back pocket. Range of motion is measured with the palm facing the side of the body and the arm straight. It is measured from neutral to the highest point the arm can be lifted behind the back. Normal range of motion is between 45 and 60 degrees.