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Biomedical subjects

M H Pope

Publications and source records attributed to M H Pope.

At least 145 records · Page 8Linked to original sources
PubMed1981

Skiing injuries.

Ski injuries were studied over a six-year period at a ski area in Northern Vermont. While the injury was being treated we gathered injury, anthropometric and ability data. The binding was tested using ASTM techniques. We found all injuries to decrease but there was a bigger reduction in lower leg injuries. There was a marked decrease of the mean release torque towards the ASTM recommendations of the lower extremity group, which was attributed to be the reason for the decrease in injury rate. The medial collateral ligament injury continues to be the most prevalent of the lower extremity injuries. Injury mechanisms of this injury were explored. More work to understand how to protect the knee needs to be done.

Age Factors↗
PubMed1979

The role of the musculature in injuries to the medial collateral ligament.

With a knee-testing device we measured the valgus stiffness of the medial musculoligamentous complex of the knee in five volunteers. Tests were done with the muscles quiescent and with contraction of the sartorius and vastus medialis. Contraction of those muscles substantially increased the valgus stiffness. In eight subjects the voluntary reaction times were measured. With either a visual or a tactile impulse for prophylactic muscle contraction, the muscles acted too slowly to augment the stiffness of the knee so as to prevent injury. In fifty-one volunteers we applied the maximum torque to the leg, just short of eliciting pain, and showed that even then the muscle contraction would occur too late to protect the knee in typical sports situations.

Adolescent↗
PubMed1978

The role of trauma in low back pain: a review.

Trauma plays an important role in the production of low back pain. This review emphasizes how the forces to which the spine is subjected are modified by many factors. Attention is directed to the role of mechanical stress in the etiology of spondylolisthesis, subtle spinal fractures, as well as the relevance of stress to the degenerative process. It is suggested that trauma plays a very major role in low back pain but, at present, the problems in diagnostic technology create difficulty in establishing the precise degree of that role. The drawbacks of over-reliance on plane radiography are emphasized. It is suggested that improved diagnostic techniques may result in more accurate treatment and perhaps less disability resultant from the ubiquitous problem of low back pain.

Back Pain↗
PubMed1977

Fracture healing in the sciatically denervated rat.

Fractures of the fibula were produced in rats with sciatic denervation. The denervated rats exhibited more rapid fracture healing than controls. Fifteen days following injury, enhanced union was measured by histologic assessment (p less than 0.001), and biomechanical testing including fracture stress (p less than 0.005), elastic modulus (p less than 0.005), strain at failure (p = 0.01) and energy to failure (p = 0.05).

Animals↗
PubMed1976

The strength and failure characteristics of rat medial collateral ligaments.

Traumatic loading of the knee joint in man occurs at strain rates ranging from 0.5-1,500 m/m/sec. Experiments on the medial collateral ligament of rats demonstrate that the mode of failure is a function of the strain rate. Avulsions occurred more often at low rates; ligament tearing occurred more often at high rates.

Animals↗
PubMed1976

A biplane radiographic method of determining vertebral rotation in postmortem specimens.

Vertebral axial rotation can be measured by accurate identification of three bony landmarks: the tips of the superior articular facets; the inferior bases of the pedicles; the tips of the inferior articular facets. Geometric solution for the movement of these three points in space does not require an initial unrotated view, and can be proved with accuracy of up to 4 degrees in the thoracic spine and 3 degrees in the lumbar spine under experimental conditions. The method is applicable to the problem of measurement of structural scoliotic deformities on routine clinical roentgenograms.

Humans↗
PubMed1976

Mechanical changes in the knee after meniscectomy.

A compression testing machine was used to transmit increasing loads at various strain rates across twelve canine and twelve human cadaver knees. The specimens were originally evaluated with both menisci intact and the same tests were repeated with one meniscus removed and then with both menisci removed. This investigation showed that the menisci perform a load-transmitting and energy-absorbing function in the knee joint. The stress acting across the joint increased significantly after meniscectomy. The intact meniscus was deformed during compressive loading rather than being passively pushed away, thus demonstrating the presence of hoop stresses within the meniscus.

Animals↗