A broad, flat muscle of the back in vertebrate animals, extending from the lower thoracic and lumbar vertebrae, sacrum, and iliac crest to the humerus, primarily responsible for extension, adduction, and medial rotation of the forelimb.
A broad, flat muscle of the back in vertebrate animals, extending from the lower thoracic and lumbar vertebrae, sacrum, and iliac crest to the humerus, primarily responsible for extension, adduction, and medial rotation of the forelimb.