musculus pectoralis การใช้

• The pigeon had particularly large breast muscles that indicate powerful flight ( musculus pectoralis major for downstroke and the smaller musculus supracoracoideus for upstroke ).
• Less radical is the assessment that due to the lack of a keeled sternum and a high acrocoracoid, the " Musculus pectoralis minor " could not serve as a " M . supracoracoideus " lifting the humerus via a tendon running through a " foramen triosseum ".