Muscle contraction is the tightening, shortening, or lengthening of muscles when you do some activity. It can happen when you hold or pick up something, or when you stretch or exercise with weights.

The sarcomere is the most basic contractile unit in skeletal and cardiac muscle. Mutations in genes encoding sarcomeric proteins give rise to heritable myopathies, although muscle function is more ...

Preterm labor and delivery of an under-developed fetus affect approximately 13 million births worldwide each year 1. The number of babies that die annually due solely to their prematurity ranges from ...