The base of this triangular muscle is attached along the lumbar and lower half of the |thoracic vertebrae| (spine), the lower |ribs|, and even the hip bones far below. The |latissimus dorsi| is a wide, flat muscle located on the lower half of the back. The |muscle fibers| at its tip insert under the |scapula| (shoulder blade) and join to the |humerus| (upper arm bone) in the shoulder. This muscle gives your arms motion. It is used when |swimming| or when you swing your arms back when |jogging|. It is also used to reach up to grab something above your head.
