Scapular & Pectoral Regions Flashcards
Identify.
supraspinatus
Identify.
Subtendinous bursa
Subscapularis
origin
insertion
action
supply
origin = subscapular fossa
insertion = lesser tubercle of humerus
action = medially rotate humerus
supply = upper & lower subscapular n’s, subscapular a/v
Teres Minor
origin
insertion
action
supply
origin = lateral scapula
insertion = greater tubercle humerus
action = laterally rotate humerus
supply = axillary n & suprascapular/subscapular a/v
If this tendon wears away, the subacromial bursa can become continuous with the joint capsule & shoulder movement is painful, arm movement is limited.
Supraspinatus tendon
this artery is a continuation of subclavian artery
axillary
2 heads of pectoralis major?
clavicular & sternocostal
Borders of triangular interval?
Superior = Teres major
Medial = Long head triceps brachii
Lateral = Lateral head triceps brachii
Dorsal scapular nerve = ventral ramus of…
C5
between subscapularis muscle & joint capsule (is there so muscle doesn’t rub against fibrous membrane of the capsule)
subtendonous bursa
Identify 1-2.
- Teres Minor
- Teres Major
dorsal scapular artery is a branch off of…
subclavian a
this muscle is “lat’s little helper”
Teres Major
Rotator Cuff muscles
“SITS”
Supraspinatus
Infraspinatus
Teres Minor
Subscapularis
the subscapular artery comes off of the ____ and splits into __ & ___
axillary artery
thoracodorsal & circumflex scapular
Identify 1-8.
- Coronoid Tubercle
- Conoid Ligament
- Trapezoid Ligament
- Acromioclavicular ligament
- Acromion
- Coracoid process
- Glenoid Cavity
- Suprascapular notch
what 2 vessels provide collateral circulation to scapular region?
thyrocervical trunk & subscapular a
Identify 1-2.
- Teres Minor
- Teres Major
Identify.
infraspinatus
this nerve comes off of lateral cord of brachial plexus, runs above pec minor to enter pec major
lateral pectoral n
membranous sac containing synovial fluid inferior to acromion & deltoid but superior to supraspinatus.
Subacromial bursa
if you ligate anywhere distal to this artery, blood cannot flow to upper limb
subscapular a
Pectoralis Major
origin
insertion
action
supply
origin = clavicle, sternum, ribs 2-6
insertion = greater tubercle of humerus
action = aDduct & medially rotate humerus
supply = medial/lateral pectoral n’s & thoracoacromial a/v
which ligament divides the suprascapular nerve & artery?
superior transverse scapular ligament
artery goes over
nerve goes under
This set of muscles provides inner muscular support for the shoulder.
Rotator Cuff
Identify.
subacromial bursa
Identify.
Deltoid
Identify.
Subscapularis
Muscles of the pectoral girdle?
Deltoid
Teres Major
Teres Minor
Supraspinatus
Infraspinatus
Subscapularis
2 muscles that assist the rotator cuff muscles
Deltoid & Teres Major
this nerve comes off of medial cord of brachial plexus, pierces pec minor to enter pec major
medial pectoral n
Infraspinatus
origin
insertion
action
supply
origin = infraspinous fossa
insertion = greater tubercle of humerus
action = laterally rotate humerus
supply = suprascapular n/a/v & subscapular a/v
Borders of the Triangular space?
superior = teres minor
inferior = teres major
lateral = long head triceps brachii
the accessory nerve and transverse cervical artery supply…
trapezius
this nerve supplies serratus anterior superficially. Damage to it can occur during mastectomy. (“winged scapula”)
long thoracic nerve
dorsal scapular n/a supply…
levator scapulae & rhomboids
Identify 1-2.
- Suprascapular artery
- Suprascapular nerve
Pectoralis Minor
origin
insertion
action
supply
origin = ribs 3-5
insertion = coracoid process of scapula
action = protracts scapula
supply = medial pectoral n, thoracoacromial a/v
Where does clavicle attach to axial skeleton?
Acromioclavicular ligament
suprascapular artery is a branch off of…
thyrocervical trunk
upper & lower subscapular nerves come off of…
posterior chord
Synovial membrane of the glenohumeral joint protrudes through capsule membrane in structures called…
bursae
Identify the spaces & their contents.
- Quadrangular space (axillary n, posterior circumflex humeral a)
- Triangular interval (radial n, deep brachial a)
- Triangular space (circumflex scapular a)
Teres Major
origin
insertion
action
supply
origin = inferior scapula
insertion = lesser tubercle of humerus
action = medially rotate/extend humerus
supply = lower subscapular n & subscapular a/v
Borders of the quadrangular space?
Superior = Teres minor
Inferior = Teres major
Medial = long head triceps brachii
Lateral = surgical neck of humerus
Identify 1-4.
- Clavicle
- Glenoid Cavity
- Acromion
- Head of humerus
what is purpose of collateral circulation of the scapular region?
ensures adequate blood supply to upper limb in event of ligation
what envelops pectoralis minor?
clavipectoral fascia
transverse cervical artery is a branch off…
thyrocervical trunk
This muscle initiates abduction of the humerus.
Supraspinatus
supplies lateral thorax, lateral pec region, lateral breast
lateral thoracic artery
Identify the branches.
- Superior thoracic
- Thoracoacromial
- Lateral Thoracic
- Anterior circumflex humeral
- Posterior circumflex humeral
- Subscapular
- Circumflex scapular
- Thoracodorsal
the upper & lower subscapular nerves & the subscapular artery all supply…
subscapularis muscle
Supraspinatus
origin
insertion
action
supply
origin = supraspinous fossa
insertion = greater tubercle of humerus
action = aBduct humerus 1st 15 degrees
supply = suprascapular n/a/v, dorsal scapular a/v
Deltoid
origin
insertion
action
supply
origin = lateral clavicle, acromion, spine of scapula
insertion = deltoid tuberosity of humerus
action = aBducts humerus, flexes/extends humerus
supply = axillary n & posterior circumflex humeral a/v
the lateral thoracic nerve travels with this artery
long thoracic
Where does the shoulder articulate with the arm?
Glenoid cavity
where do the suprascapular nerve & artery pass through?
spinoglenoid notch (to the infraspinatus fossa to supply supraspinatus & infraspinatus)
branch of subclavian artery that descends across intercostal spaces lateral to sternum & supplies medial/anterior thorax
internal thoracic artery
4 branches of thoracoacromial artery
“Akron City Police Department”
acromial
clavicular
pectoral
deltoid
This muscle provides outer muscular support of the shoulder.
Deltoid
