Pectoral Region/Axilla Flashcards
manubrium
upper part of the sternum
sternoclavicular joint
attaches clavicle to sternum
glenoid fossa
socket for the shoulder joint
spine of the scapula
divides the suprapinous and infraspinous fossa on the acromion
intertubucular groove
hold the long head of the biceps, intersects the greater and lesser tuberosities
glenohumeral joint
connects humerus to glenoid fossa
coracoclavicular ligaments
help to suspend scapula from above, consist of trapezoid and conoid ligaments
tranverse ligament of the humerus
keeps tendon of long head of the biceps from popping out, runs across tubrecles
shoulder separation
rupture of the acromioclavicular or corococlavicular ligaments
type 1 - incomplete
type 2 - complete tear of one
type 3 - total tear of both
piano key deformity
shoulder separation, clavicle pops up after it is depressed, trapezius muscle elevates it
delto-pectoral (clavipectoral) triangle
holds the cephalic vein, similar to the great saphenous vein
pectoralis major
two heads (clavicular and sternocostal) - attaches to the lateral lip of the intertubucular groove - adducts the arm/flex humerus at shoulder medial and lateral pectoral nerve supplies it
pectoralis minor
originates on rib 3-5, inserts in coracoid process, pulls scapula forward (protraction)
- supplied by the medial pectoral nerve of the brachial plexus
subclavius
clavicle to first rib, anchor and depresses the clavicle, supplied by nerve to the subclavius
serratus anterior
originates on ribs 1-9, inserts on anterior medial edge of scapula, protracts the scapula
- supplied by long thoracic nerve of brachial plexus
rotation of the scapula superiorly to raise arms
lower part of the serratus anterior and upper part of the trapezius act together to rotates scapula
winged scapula
damage to long thoracic nerve, medial border of scapula moves posteriorly, noticeable when pressing against wall, cant put hands above head
boundaries of the axilla
anterior = pec major/minor medial = serratus anterior posterior = latissimus dorsi laterally = humerus base = skin
branch of the first part of the axillary artery
superior thoracic artery (pec minor and intercostal muscles)
branches of the second part of the axillary artery
thoraco-acromial artery and lateral thoracic artery
branches of the third part of the axillary artery
subscapular artery, posterior/anterior circumflex arteries
median cubital vein
connects the basillic and cephalic vein
blood supply to the breasts
lateral thoracic artery and internal thoracic artery
