Source:http://linkedlifedata.com/resource/umls/id/C0181124
UMD: Devices designed to provide traction to the cervical vertebrae by pulling the head using force from an external traction unit. These devices typically combine several padded straps in a lightweight structure; usually one of the straps is placed under the chin, a second strap is placed on the back of the head, and a third strap is placed around the neck, attaching the two other straps. A head halter includes one or more rings at the top that permit its connection to the cable of an external traction unit that usually includes a pulley and a set of weights. Head halters intended for horizontal and/or vertical (frequently including spreading bars) traction are available; they are used in orthopedic and/or physical therapy procedures, including fracture treatment and widening of the intervertebral spaces in the spine.