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Pectoral Region Lect

Gross Anatomy of the Pectoral Region

QuestionAnswer
Pec Major Clavicular Head Prox. Anterior medial clavicle
Pec Major Sternocostal Head Prox. Anterior sternum, superior 6 costal cartilages, and external oblique aponeurosis
Pec Major Dist. Lateral Intertubercular Groove
Pec Major Act. ADducts and Internally Rotates Humerus, Flexes Humerus (Clavicular Head), Extends Humerus (Sternocostal)
Pec Major Inn. Medial and Lateral Pectoral Nerves
Pec Minor Prox. 3-5 Ribs
Pec Minor Dist. Medial Superior Coracoid Process
Pec Minor Act. Stabilizes Scapula (pulls anteriorly and inferiorly)
Pec Minor Inn. Medial Pectoral Nerve
Subclavius Prox. 1st Rib and Costal Cartilage
Subclavius Dist. Inferior medial 1/3 of clavicle
Subclavius Act. Anchor and depress clavicle
Subclavius Inn. Nerve to Subclavius
Serratus Anterior Prox. External surface of ribs 1-8
Serratus Anterior Dist. Anterior medial scapular border
Serratus Anterior Act. Scapular Protraction (primary) and Rotation
Serratus Anterior Inn. Long Thoracic Nerve (SALT)
Deltopectoral Triangle Borders Clavicle, Pec Major Clavicular Head, and Anterior Deltoid
Deltopectoral Triangle Contents Cephalic Vein and Branch of Thoracoacromial Artery
3 Superficial Pectoral Veins Cephalic, Basilic, and Median Cubital
C3 Dermatome Area Turtle Neck Section of Body
C4 Dermatome Turtle Neck and Cape
C5 Dermatome Lateral Arm to Proximal Forearm
C6 Dermatome Lateral Forearm to Thumb
C7 Dermatome Middle Finger
C8 Dermatome Ulnar Side of Hand (Ring/Pinky Finger)
T1 Dermatome Medial Side of Proximal Forearm and Arm to Axilla
Supraclavicular Cutaneous Nerve Inn. Skin over clavicle and superolateral Pec Major
Radial Nerve continues as: Posterior Brachial Cutaneous and Posterior Antebrachial Cutaneous nerves of arm and forearm
Musculocutaneous Nerve Inn. Skin along Radial (Lateral) forearm to base of Thenar eminence
Axillary Cutaneous Nerve Inn. Skin over Deltoid
Medial Brachial Cutaneous Nerve Inn. Skin over Medial Arm
Medial Antebrachial Cutaneous Nerve Inn. Skin over Medial Forearm
Created by: frankfrank05
 

 



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