Pectoral Region and Axilla

Pectoralis Major Attachment: -Medial: Sternal End of Calvicle, Sternum, and Cartilage of Ribs (1-7) -Lateral: Interubecular Groove Innervation: -Medial and Lateral Pectoral nerves (C5-T1) Function: -Both heads: Adducts and Medial Rotates HUmerus -Clavicular Head: Flexes Humerus -Sternocostal Head: Extends the flex humerus Testing: -Clavicular Head: F

*Understanding the Pectoralis Major: Describe the Pectoralis Major? Include: -Attachment: -Innervation: -Function -Testing

Pec Minior Attachment: -Superior Attachment: Coracoid Process -Inferior: Ribs 3,4,5 Innervation: -Medial and Lateral Pectoral nerves (C5-T1) Function: -Protraction of Scapula and Fix Scapula

*Understanding the Pectoralis Minor: Describe the Pectoralis Minor? Include: -Attachment: -Innervation: -Function

Subclavius Attachments: -Superior Attachment: Inferior aspect of the clavicle -Inferior Attachment: First Rib Innervation: -Nerve to Subclavius (C5, C6)

*Understanding the Subcapular: Describe the Subcapular? Include: -Attachment: -Innervation: -Function DONT WORRY ABOUT THIS NOTECARD

Clavipectoral Fascia: -Cephalic Vein -Thoracoacromial Artery/Vein -Lateral Pectoral Nerve -Lymphatics Infections: -Infection b/t calvipectoral fascia and pectoral fascia: Restricted spread to the sternum and humerus -If the infection is deep to Clavipectoral fascia: free access to get into neck and down the arm

*Understanding the axillary Fascia Background Information: -Superficial Fascia: Fatty Layer of subcutaneous tissue -Deep Investing: Pectoral Fascia -invest the pectoralis major *Attaches to sternum and clavicle then will blend in with brachial, axillary, thoracic, and abdominal fascia *Continuous with fascia from Lat. Dorsi *Has a deep slip that will envleop pec minior which will help form Clavipectoral Fascia -Deep Investing: Clavipectoral Fascia- invests the pec minior and will extend superiorly around subclavius and attach to clavicle ------------------------------------- What pierces the Clavipectoral Fascia? Hint: CALL Whats the significance of this fascia and infections?

Part 1: Rib 1 to Medial Border of Pec Minior -Supreme/Superior Thoracic Artery Part 2: Covered by Pec Minior -Thoracoacromial Artery (CPAD) -Lateral Thoracic Artery Part 3: Lateral Border of Pec Minior to Inferior Border of Teres Major -Subscapular Artery (Circumflex and Thoracodorsal Artery) -Anterior Circumflex Humeral Artery -Posterior Cicrumflex Humeral Artery

*Understandings of the Axillary Artery Background Info: Name Changes: -Starts as: Subclavian -Passes 1st Rib: Axillary -Passes Teres Major: Brachial Describe the boundaries and parts of Axillary Artery?

Supreme Thoracic Artery supplies: -Thoracic Cage -Pectoral muscles

*Understandings of the Axillary Artery: Part 1 Branches What does the Supreme Thoracic Artery supply?

Thoracoacromial Artery Supplies: -C: Clavicle -P: Pecs -A: Acriomion -D: Deltoid Lateral Thoracic Artery Supplies -Serratus Anterior -Pec -Subcapularis

*Understandings of the Axillary Artery: Part 2 Branches What do the following branches supply: -Thoracoacromial Artery -Lateral Thoraic Artery

Subscapular Artery: Sibcapularis Muscle -Branches: Circumflex Scapular and Thoracodorsal Artery Anterior Circumflex Artery: -Head of the Humerus + Shoulder Joint Posterior Circumflex Artery: -Back of Humerus?

*Understandings of the Axillary Artery: Part 3 Branches What do the following branches supply: -Subcapular Artery (includes its further branches) -Anterior Circumflex Humeral Artery: -Posteriro Circumflex Humeral Artery:

Apex: Cervicoaxillary Canal Base: Skin and Axillary fascia Anterior: Pectoralis Major and Minior Posterior: Sibcapularis, Latissimus, Teres Major Lateral: Humerus Medial: Thoracic Wall and Serratus Anterior Axilla Contents: -Brachial Plexus -Axillary artery -Axillary Vein -Lymphatics

Describe the boundaries of the axilla What comes through axilla?