The Pectoral Region
Upon completion of this session, the student will be able to:
1. Be familiar with the surface and bony anatomy of the pectoral
|Summary of Dissection
1. Remove the skin from the chest wall.
2. Remove the mammary gland and nipple in its entirety on each side. It will not be studied at this time.
3. Clean the cephalic vein and deltopectoral triangle.
4. Clean, identify and reflect the pectoralis major muscle and its blood and nerve supply.
5. Clean and identify the pectoralis minor muscle, identify its blood and nerve supply and clavipectoral fascia.
6. Identify the visible portion of the serratus anterior muscle.
Materials to be learned:
1. Surface anatomy (Identify landmarks on both a living person and the cadaver)
|(1) jugular notch
(2) sternal angle
(3) xiphisternal junction
(5) axillary folds
(6) mid-clavicular line
(9) coracoid process
(10) costal arch
(11) sternal line
(12) intercostal spaces
|Study the clavicle, which forms the ventral portion of the shoulder girdle.
It is one of the most commonly fractured bones in the body.
The sternum or breast bone forms a portion of the ventral wall of the thorax. It consists of three parts: Manubrium, body and xiphoid process.
Determine the vertebral levels of the jugular notch, sternal angle, and xiphoid. The sternum articulates with the costal cartilages of ribs one to seven.
|What is meant by a "winged scapula?"|
|The superficial fascia surrounds the mammary gland will be studied with
the reproductive system. The deep membranous fascia forms the clavipectoral
What structures pierce the clavipectoral fascia?
|1. pectoral branches from the thoracoacromial artery
From what vessel does the thoracoacromial artery arise?
2. perforating branches from the anterior intercostal arteries.
|The pectoral muscles are innervated by the medial and lateral pectoral
nerves, which are derived from the medial and lateral cords of the brachial
What is the relationship of the medial pectoral nerve to the pectoralis minor muscle, the lateral pectoral nerve?