This
is the "Trap" muscle in a dog. It originates in the neck and entire
upper to mid back. It's job is to lift and elevate the front leg as well
as draw it forward. Its powered by the spinal accessory nerve from the
upper neck. If your dog has issues with jumping this muscle may be
involved as well as its power supply. Contact Dr Bruce he will come to your house so your dog is most comfortable. Chiropractic adjustments to the spine where the muscle originates as well as cold laser to the muscle and some rehab exercises will greatly help your dog. Contact Dr Bruce at 781-337-1180 or indekchiropractic@gmail.com