sternocostal head of pectoralis major (muscle)
Definition: portion of pectoralis major (muscle) originating from the sternum and ribs; acting alone the ternocostal part extends the arm at the shoulder joint; acting with the clavicular head it adducts the arm.
See: pectoralis major (muscle)
Synonym(s): pars sternocostalis musculi pectoralis majorisTA, sternocostal part of pectoralis major muscle
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