Teres major and latissimus dorsi muscles in human embryos: A reconsideration of the so-called brother muscles.The teres major and latissimus dorsi muscles (TM, LD) are considered to be the so-called brother muscles. 
Teres major
Teres major and latissimus dorsi muscles in human embryos: A reconsideration of the so-called brother muscles.The teres major and latissimus dorsi muscles (TM, LD) are considered to be the so-called brother muscles. 
latissimus dorsi
Teres major and latissimus dorsi muscles in human embryos: A reconsideration of the so-called brother muscles.The teres major and latissimus dorsi muscles (TM, LD) are considered to be the so-called brother muscles.  However, splitting had already finished in not only the TM and LD but also the other muscles at and around the shoulder in specimens of 14 mm CRL.  A concept of brother muscles might be applied to the TM and LD according to a bias from the gross and comparative anatomy, not from the embryological view.
THERM