Pectoral Region, Anterior Shoulder, Axilla, Breast Flashcards
what is the muscle on the anterior thoracoappendicular region
pectoralis major
what artery separates deltoid from the pectoralis major
basilar artery
what nerves innervate the pectoralis major
medial and lateral pectoral nerves
what muscle has an origin at:
Clavicular head – anterior surface of medial half of clavicle
Sternocostal head – anterior surface of sternum, superior 6 costal cartilages, aponeurosis of external oblique
pectoralis major
what muscle has an insertion at:
Lateral lip of intertubercular (bicipital groove) of humerus (part of the PLT)
pectoralis major
what muscle:
Adducts, Internally Rotate, draws scapula anteriorly and inferiorly
Clavicular head – flexes humerus
Sternocostal head – extends humerus
pectoralis major
what is innervated by the medial pectoral nerve
pectoralis minor
what muscle:
Stabilizes scapula by drawing it inferiorly and anteriorly against thoracic wall (depresses and protracts scapula)
pectoralis minor
what muscle:
origin near ribs 3-5 near their costal cartilages
pectoralis minor
what muscle:
insertion near medial border and superior surface of coracoid process of scapula
pectoralis minor
what muscle:
causes “Rounded Shoulder Posture”
and
Neurovascular Entrapment – Thoracic Outlet Syndrome
pectoralis minor
what muscle:
origin near external surfaces of lateral parts of ribs 1-8
Serratus Anterior
what muscle:
insertion at anterior surfaces of medial border of scapula
Serratus Anterior
what muscle:
Protracts scapula and holds it against thoracic wall, upward rotation of scapula
Most important muscle that stabilizes scapula to thoracic wall
weak muscle could cause winging of the scapula**
Serratus Anterior
what muscle:
innervated by the Long thoracic nerve
serratus anterior
what muscle:
Anterior- Flexes and internally rotates arm at Shoulder
Middle- Abducts arm at Shoulder
Posterior- Extends and externally rotates arm at Shoulder
deltoid
what muscle:
insertion near deltoid tuberosity of humerus
deltoid
what muscle:
origin at Lateral third of clavicle, acromion, spine of scapula
deltoid
what muscle:
innervated by axillary nerve (c5, c6)
deltoid
Pyramidal shaped space through which important neurovascular structures pass between the upper limb, neck, and chest cavity
axilla
the axilla sheath contains these 3 things
axillary artery
axillary vein
Brachial plexus (infraclavicular portion)
what artery begins at inferior border of teres major and ends in cubital fossa (opposite the neck of radius)
brachial artery
what are the blood vessels of the aortic arch
aorta, brachiocephalic trunk, right CCA, left CCA, left subclavian
Remember your “ABCS”
what is the order of the UE artery?
SUBCLAVIAN then AXILLARY then BRACHIAL
do men have mammary glands
yes, but cannot lactate due to hormonal differences
what stimulates breast development in females
estrogen
what are mammary glands composed of
15-20 irregularly shaped lobes
alveolar glands, then alveolar ducts, then lactiferous duct, then nipple
how many people for breast cancer in 2014
233,000 new cases
40,000 death
what 3 muscles attach at the coracoid process**
pectoralis minor
coracobrachialis
short head of the biceps brachii
