Relationship of head posture and the rest position of the mandible.

Eight subjects were evaluated to assess the relationship between VDR and head posture. Photographic evaluation of head position and VDR was performed initially to quantify a baseline recording. All subjects were then given 4 weeks of physical therapy to improve head posture. Photographs were remade after 2 and 4 weeks of therapy. An increase in the VDR and in the angle of the head to the cervical vertebra was noted in all patients. Although further study is indicated to confirm the findings of this pilot study, it appears that the VDR is influenced by head position. This finding should be considered when prosthodontic problems are treated.

Effect of forearm abduction on the ulnar collateral ligament.

Seven fresh cadaveric elbows from one woman and three men were studied to determine if the forearm abduction mobilization commonly used to restore the last 20 degrees of elbow extension produced an increase in the length of the anterior band of the ulnar collateral ligament. Initial ligament length and maximum length during mobilization were measured with a dial caliper and recorded on videocassette. Results indicated no significant difference between ligament lengths at rest and during the mobilization. The mechanism by which the forearm abduction mobilization restores elbow extension remains unknown.