An unusual bilateral sternalis muscle

Area of Science:

• Anatomy
• Morphology
• Human Anatomy

Background:

• The sternalis muscle is an anatomical variation of the pectoralis major muscle.
• Its presence, morphology, and innervation are subjects of ongoing scientific debate.
• Understanding such variations is crucial for accurate anatomical interpretation.

Observation:

• A bilateral sternalis muscle was identified during routine dissection of a 64-year-old Caucasian male cadaver.
• The right sternalis muscle exhibited an atypical morphology, presenting as three distinct, parallel strap-like slips.
• The left sternalis muscle's morphology was not detailed in the provided abstract.

Findings:

• The study documents a unique presentation of the sternalis muscle variation.
• The unusual morphology of the right sternalis muscle is highlighted.
• The paper addresses controversial aspects including the muscle's origin, incidence, and innervation.

Implications:

• This finding contributes to the anatomical knowledge of sternalis muscle variations.
• The discussion on controversial elements may stimulate further research into its embryological development and evolutionary significance.
• Understanding this variation is clinically relevant for interpreting imaging studies and surgical procedures in the thoracic region.