Scapula, Deltoid, Pex & Axilla Flashcards
describe ribs 8-10
false ribs, vertebrochondral
which ribs are atypical
1,2,11,12
what innervates the breast?
what vascularizes it primarily?
ant. and lateral branches intercostal nerves 4-6
ant. intercostal, lateral thoracic, internal thoracic arteries
what attaches the breast to dermis?
Cooper’s ligaments
what is the venous drainage of the breast
lateral thoracic and medial mammary veins
what makes up the borders of the clavipectoral triangle
deltoid, pec major, middle 1/3 clavicle
what pierces the clavipectoral fascia?
what does it become?
cephalic vein, thoracoacromial a., lateral pectoral n.
suspensory ligament of axilla
what innervates pec major?
lateral and medial pectoral nerves (C5-T1)
what innervates pec minor?
what is its action?
medial pectoral n. (C8, T1)
pulls scapula inf. and ant. against post. thoracic wall
subclavius action?
anchors and depress clavicle
serratus ant action?
innervation?
protracts & rotates scapula, holds scapula against thorax
long thoracic nerve (C5,6,7)
what muscle divides the axillary a. into 3 parts?
pec minor
what comes off the 1st part of the axillary artery?
where is it located
sup. thoracic a.
medial/proximal
what comes off the 2nd part of axillary a.
located?
thoracoacromial trunk
-pectroal, acromial, deltoid, (clavicular) branches
posterior
what comes off the 3rd part of the axillary a.?
located?
subscapular a. (branches into thoracodorsal and circumflex scapular aa.)
ant. and post. circumflex humeral a.
distal/lateral
what becomes the axillary vein?
basillic v.
apex of axilla?
FCS
1st rib
clavicle
scapula
roof of axilla
CAPS
chest wall
ant. and post. axillary fold
skin & superficial fascia
ant. wall of axilla
PP
pec major and minor
post. wall axilla
SLuTS scapula lats teres major subscapularis
lateral wall axila
TiC
tendon of long head biceps
intertubercular suclus
coracobrachialis tendon
where is the retromammary space located?
between the breast and pectoral fascia
deltoid action
innervation
flex, medially rotates, abducts, extends, and laterally rotates humerus
axillary n. (C5, C6)
what action can’t the deltoid do?
adduct
teres major action?
innervation
adducts and medially rotates humerus
lower subscapular n. (C5, C6)
supraspinatus action
innervation
works w/deltoid in abduction of humerus to about 15 degrees, stabilize shoulder joint
suprascapular n. (C4,5,6)
what does impingement syndrome involve?
what causes it?
supraspinatus tendon and/or subacromial bursa
repetitive overhead actions, bone spurs, weird acromion
subscapularis action
innervation
medially rotates and ADDucts humerus, hold humeral head in place
upper and lower subscapular nerves (C5, 6, 7)
what is the largest and strongest rotator cuff muscle?
what can injury in this muscle lead to?
subscapularis
bicipital tendon instability and biceps tendonitis
what holds the the long tendon of biceps brachii in the intertubercular groove?
transverse ligament
infraspinatus action
innervation
laterally rotate humerus, holds it in place
suprascapular n. (C5, C6)
teres minor action
innervation
laterally rotate humerus, holds head in place
axillary n. (C5, C6)
what does the thyrocervical trunk branch into?
transverse cervical a. (superficial branch and deep branch aka dorsal scapular a.)
suprascapular a.
ascending cervical a.
inferior thyroid a.
part 2 of subclavian a.?
cost of deep dish supreme pizza?
costocervical a. trunk
-supreme intercostal a.
-deep cervical a.
quadrangular space?
contents?
teres minor and major, long head and lateral head(surgical neck of humerus) of triceps
axillary n.
posterior circumflex humeral artery
triangular space
contents
teres major and minor, long head triceps
-sup. to triangular interval
circumflex scapular a.
triangular interval
contents
teres major, long head and lateral head triceps
radial a. and deep brachial a.
