Demonstrates that chicken pectoral muscle myofibrils fragment and sarcomeres can undergo reversible contraction post-mortem.
Hypothesis-generating in avian muscle; leaves open relevance to human cardiac myofibril preservation.
SUMMARY— As morphological changes occurred in the pectoral muscles of chicken carcasses during 48 hr storage at 5°C, two notable phenomena were observed: (1) fragmentation of myofibrils and (2) reversible or irreversible contraction of sarcomeres. When blendorized, myofibrils tend to break into small fragments composed of 1‐4 sarcomeres with time post‐mortem. It was also found that besides an irreversible post‐mortem contraction of sarcomeres generally accepted, a reversible contraction can take place under particular conditions.
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Takahashi et al. (1967) studied this question.
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