Pectoral region
The pectoral region is the anterior region of the upper chest where there are four thoracoappendicular muscles:
- pectoralis major
- pectoralis minor
- subclavius
- serratus anterior
The breast is located superficial to the muscles. The lateral border of the pectoralis major muscle forms the anterior margin of the axilla. At the superolateral aspect the pectoral region is separated from the deltoid muscle by the deltopectoral groove and contains the cephalic vein.
