What is the name of the dark band in a myofibril?

The striated appearance of myofibrils is due to the distribution pattern of two important proteins - Actin and Myosin. The light bands contain actin and the dark bands contain myosin.The light bands in a myofibril contain actin and is called I-band or Isotropic bandThe actin filaments are thinner as compared to the myosin filaments. Hence, they are commonly referred to as thin filaments and thick filaments, respectively.The dark band in a myofibril is called A or Anisotropic band and contains myosin.Skeletal muscles are known as voluntary muscles because their activities are under the voluntary control of the nervous system.