symptoms are the behaviour or a condition ... behaviour is the manifestation of emotion ... emotion is the language of the soul ... from the behaviour you can identify relationships between one part of the body and the other. one method i use is two point contact this technique is used in traditional oriental medicine, to apply two point contact is simple as the name implies your contact the area of concern (say shoulder condiiton with muscle spasm of subscapularis) usually the sign most proximal to the condition and contacting the area in question (say medial head of gastrocnemius) which is more distal and will also harbour signs. but how do i know if it is related ... traditionally you will most probably ask the patient to move their arm in the limited direction while holding the trigger point in the calf muscle, to see if there is an immediate improvement in shoulder. if there is an improvement of 50% or more you may attempt to resolve their condition with this spot and assess the long term improvement between treatment sessions. but you have not taken into account the behavioural response .. this could be the most basic response of the body ... the reflex ... or may be a more interesting phenomenon reffered pain of non pathoanatomical basis ... to assess the reflex one can easily identify the contraction and relaxation cycle when presure is applied at the site of question in regards to the proximal sign. or one may recieve feed back from the patient of a referred phenomenon travelling between the two points of assessment. there are other symptoms we can ascertain however, this explains how you may find a trigger point in the calf muscle that affects shoulder AROM because the behavioural response of the trigger point in the calf muscle may have an effect on the shoulder internal rotator... i have found that the behavioural responses dictate the effectiveness of applying treatment of a secondary region in relation to the primary area of concern.