To: jpmac who wrote (40926 ) 11/4/1999 12:33:00 AM From: Ilaine Read Replies (1) | Respond to of 71178
This is from Harrison's Principles of Internal Medicine, not the best book on nerves but it's handy: "The thoracic outlet is an anatomic region containing the first rib, the subclavian artery and vein, the brachial plexus, the clavicle, and the lung apex. Injury to these structures may produce thoracic outlet syndrome (TOS), characterized by pain around the shoulder and supraclavicular region induced by certain tasks and positions. There are at least three types of TOS. True neurogenic thoracic outlet syndrome results from compression of the lower trunk of the plexus by an anomalous band of tissue connecting an elongate transverse process at C7 with the first rib. Neurologic deficits include weakness of the intrinsic muscles of the hand and diminished sensation on the palmar aspect of the 4th and 5th digits. The arterial thoracic outlet syndrome results of compression of the subclavian artery by a cervical rib; the compression results in poststenoic dilation of the artery and thrombus formation. A reduced blood pressure in the affected limb may be accompanied by signs of emboli in the hand. Neurological signs are absent. Noninvasive doppler tests confirm the diagnosis. The disputed thoracic outlet syndrome includes a large number of patients with chronic arm and shoulder pain of unclear cause. The lack of sensitive and specific changes on physical examination or laboratory markers for this condition frequently results in diagnostic uncertainty and treament of this form of TOS is often unsuccessful." I guess the point here is that nerve damage can be caused by impingement on the nerve by some other structure of the body, be it bone, muscle, or what have you. "Releasing" the nerve, that is, removing the impingement, can save it, if done in a timely manner. But in your case, even if you cannot regain normal function, there's still hope that you can prevent further damage. My fingers are crossed.