Effects of Postmortem Freezing on Passive Properties of Rabbit Extensor Digtorum Longus Muscle Tendon Complex
LETTERMAN ARMY INST OF RESEARCH PRESIDIO OF SAN FRANCISCO CA
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The tensile properties of the extensor digitorum longus muscle tendon unit EDL MTU were studied in 16 white male New Zealand rabbits in the freshly euthanized state less than 30 minutes after death and the frozen-thawed state frozen at -80 deg C for 28 days and then warmed to 38 deg C Stretch to failure was specifically analyzed. Frozen thawed EDL MTUs had significantly lower ultimate force to failure p.01, lower energy to failure p.01, lower strain at failure p.0001, and failed at a different anatomic location fascia- muscle interface compared with the musculotendinous junction compared with the EDL MTUs from freshly euthanized animals. The results of this study have implications for the testing of freeze-stored muscles.
- Anatomy and Physiology