A Muscle in Your Chest That Causes Your Fingers to go Numb
The pectoralis minor muscle in your chest originates on your ribs, and inserts into a small bone at your shoulder. When the pectoralis minor contracts normally, you bring your arms forward, and also raise them up in front of you. If you sleep with your arm up you are contracting the muscle for hours, and it will shorten because of muscle memory.
The problem is, the median nerve to the thumb and first two fingers passes directly under the bone. As the muscle gets shortened by muscle memory, the bone presses into the nerve, and even into the artery to your hand, and your fingers go numb. If you wake up with numb hands, and then you put your arm down and shake it and it comes back, you are witnessing the result of pressure on the nerve that is caused by the pectoralis minor muscle.
This is often diagnosed as carpal tunnel syndrome, and all it really means is that the muscle needs to be treated to lengthen the fibers and take the pressure off the nerve. It is well worth the time and effort to learn how to self-treat this muscle. It's easy, and it works.
Wishing you well,
Julie
