DPT ~ Lecture Based Pec Region

axio-appendicular muscles

a muscle that is attatched to the axial skeleton and appendage which moves the extremity

surface anatomy

the study of internal structures as they relate to the overlying skin surface

bony and soft tissue landmarks are used in lab procedures for …

dissecting, palpating, mobilizing and documentation process

jugular notch

manubrium

Sternal angle (manubriosternal joint)

xiphoid process

acromion

coracoid process

glenoid cavity

subscapular fossa

supraspinous fossa

suprascapular notch

spine of scapula

infraspinous fossa

supraglenoid tubercle

conoid tubercle

trapezoid line

subclavian groove

lesser tubercle

greater tubercle

deltoid tuberosity

head of humerus

anatomical neck of humerus

Where does the clavicle typically fracture?

at the joint ot its middle and lateral third

How are clavicle fractures caused?

indirect force transmitted from an outstretched hand through the bones of the forearm and arm to the shoulder (foosh)

pectoralis major origin

Clavicular head: anterior surface of medial half of clavicle

Sternocostal head: anterior surface of sternum, superior six costal cartilages, aponeurosis of external oblique muscle

abdomial part: anterior layer of rectus sheath

pectoralis major insertion

lateral lip of intertubercular sulcus of humerus

pectoralis major innervation

lateral and medial pectoral nerves; clavicular head and sternocostal head

pectoralis major main action

Adducts and medially rotates humerus; draws scapula anteriorly and inferiorly

Acting alone, clavicular head flexes humerus and sternocostal head extends it from the flexed position

pec minor origin

3rd-5th ribs near their costal cartilage

pec minor insertion

medial border and superior surface of coracoid process of scapula

pec minor innervation

Medial pectoral nerve (C8, T1), Lat pectoral nerve

pec minor main action

Stabilizes scapula by drawing it inferiorly and anteriorly against thoracic wall

subclavius origin

junction of first rib and its costal cartilage

subclavius insertion

inferior surface of middle third of clavicle

subclavius innervation

Nerve to subclavius (C5, C6)

subclavius main action

anchors and depresses clavicle

serratus anterior origin

external surfaces of lateral parts of 1st and 8th ribs

serratus anterior insertion

anterior surface of medial border of scapula, including superior and inferior angles

serratus anterior innervation

Long thoracic nerve (C5, C6, C7)

serratus anterior main action

protracts scapula and holds it against thoracic wall; rotates scapula

motions of the shoulder

flexion, extension, adduction, abduction, internal rotation, external rotation, horizontal abduction, scaption

The first part of the axillary artery is located between the lateral border of the 1st rib and the medial border of the pec minor. It is has one branch the _________

superior thoracic artery

The second part of the axillary artery lies posterior to pec minor and has two branches the _________ and _________

thoracoacromial and lateral thoracic arteries

The third part of the axillary artery is from the lateral border of pec minor to the inferior border of teres major and gives of three branches: ________, ________, and ______

subscapular artery, anterior circumflex humeral and posterior circumflex humeral artery

nerves come from the brachial plexus

lateral pectoral (lateral cord of bp)
medial pectoral (medial cord of bp)
nerve to subclavius

anterior median line

midclavicular lines

anterior axillary line

1

midaxillary line

2

posterior axillary line

3

posterior median line

scapular lines

deltopectoral groove

anterior axillary fold

posterior axillary fold

axillary fossa

sternocostal head of pectoralis major