A deep muscle of the back in vertebrate animals, extending from the thoracic vertebrae to the cervical vertebrae, primarily responsible for extension and stabilization of the vertebral column, particularly in the upper back and neck during movement.
A deep muscle of the back in vertebrate animals, extending from the thoracic vertebrae to the cervical vertebrae, primarily responsible for extension and stabilization of the vertebral column, particularly in the upper back and neck during movement.