Pectoralis minor syndrome is a type of neurogenic thoracic outlet syndrome (TOS) that can cause upper extremity or arm symptoms of pain, paresthesia, and/or weakness due to compression of the neurovascular bundle by the pectoralis minor muscle. When injury to the pectoralis minor muscle occurs either from accidents or repetitive strain, restrictive adhesions or scar tissue can develop within the muscle. When this occurs the muscle can shorten and tighten and compress the underlying nerves. This will then produce the common symptoms in the arm. There is a way to treat this condition without drugs or surgery and that is with Active Release Techniques (ART). By applying Active Release Techniques to the restricted pectoralis minor muscle we can restore the muscle to it's normal length and tension. By releasing the muscle we can alleviate the compression of the underlying nerves and thereby relieve the associated pain and neurological symptoms in the arm.