Glenohumeral Jt.
What describes the function of the glenohumeral ligament?
A) stabilizes posterior aspect of humerus
B) stabilizes lateral aspect of humerus
C) stabilizes anterior aspect of humerus
D) stabilizes medial aspect of humerus
Bonus:) primarily restrains what kind of dislocation?
C!!! it stabilizes the anterior aspect
Bonus: restraint against ANTERIOR DISLOCATION!!!
The anterior border consists of?
A) Pectoralis Major; Pectoralis Minor
B) teres minor, teres major
C) thoracic wall
D) intertabercular sulcus
A) Pectoralis Major; Pectoralis Minor
What makes up the Quadrangular space?
A) pectoralis major, triceps long head, teres major, humerus
B) teres minor, triceps long head, teres major, humerus
C) teres minor, triceps medial head, teres major, humerus
D) teres minor, triceps lateral head, teres major, humerus
B) teres minor, triceps long head, teres major, humerus
Anterior Muscles....._________?!
SUPER EASY
FLEX!!!!!
YAY
Posterior Muscles....._______!
SUPER EASY!
EXTEND!!!!!!
YAY!!
Which two ligaments are most likely to support the superior aspect of the humerus; preventing superior displacement of the humeral head? What are these 2 ligaments?
A) Coracoclavicular & Acromioclavicular
B) Coracohumeral & Coracoacromial
C) glenohumeral & coracohumeral
D) coracoclavicular & coracoacromial
B) Coracohumeral & Coracoacromial
The posterior border consists of: two truths & a lie edition! Where is the lie????
scapularus
teres minor
latissimus dorsi
Teres MINOR is the LIE!
should be teres MAJOR!!!!
so all together: scapularis, teres major, lattisimus dorsi!
What vessels go through the quadrangular space?
A) radial N. & posterior circumflex A.
B) radial N. & anterior circumflex A.
C) axillary N. & posterior circumflex A.
D) axillary N. & anterior circumflex A.
Bonus: the nerve involved innervates what muscle?
C) axillary N. & posterior circumflex A.
Bonus: innervates deltoid!
Extra info to help...
Origin: coracoid process of scapula
Inserts: middle of humerus
Action: flexion, ADDuction of shoulder; resists dislocation
CORACOBRACHIALIS!
2)What is it's innervation?
3)long head has an extra action. what is it?
1)extensor of the elbow!
2)Radial n.
3)long head:resists dislocation during ABduction
Professor Davis's Favorite!
Step-off sign involves which 2 ligaments COMPLETELY DESTROYED??!!
Bonus ;) which is stronger of the two?
coracoclavicular & acromioclavicular
step-off (when clavicle separates from scapula)
Bonus - CC (coracoclavicular)!!
Medial Border & Lateral Border: group which one goes to medial/lateral.
A) thoracic wall
B) intertubercular sulcus of humerus
C) serratus anterior
A & C - belong to medial border
^ serratus anterior & thoracic wall
B - belongs to lateral border
^ intertubercular sulcus
What makes up the triangular space?
A) teres minor, teres major, long head of triceps
B) teres minor, teres major, lateral head of triceps
C) teres minor, teres major, medial head of triceps
A) teres minor, teres major, long head of triceps
What are our rotator cuff muscles????
CHILL QUESTION (SITS)
order them front to back!!!!
subscapularis
supraspinatus
infraspinatus
teres minor
What muscle assists the triceps brachii in stablizing elbow jt? Also has ABduction of ulna during pronation!
What nerve innervates it?
Aconeous
Radial N.
What ligament holds the long head of biceps groove in the intertubercular groove?
in other words: keeps biceps in the groove!
A) Coracoclavicular
B) glenohumeral
C) coracohumeral
D) transverse humeral
Contents of Axillary Sheath!!!
Hint ;))) name 4 things
Axillary A.
Axillary V.
Branchial Plexus CORDS
Lymphatic Vessels
what artery goes through the triangular space?
A) axillary A.
B) brachial A.
C) circumflex scapular A.
D. Radial A.
C) circumflex scapular A.
Brachialis is innervated by the musculocutaneous n. & helps in flexion!
Where does it originate & insert?
insertion - coronoid process & tuberosity of ulna
Random:
Movements of the glenohumeral jt?
lateral & medial rotation, flexion & extension; abduction & adduction
Where does the scapula articulate?!!!
A) elbow jt
B) sternovlacicular jt
C) glenohumeral jt
D) acromioclavicular jt
D) acromioclavicular jt
Two parts!
1. Are axillary lymph nodes inside the axillary sheath?
2. what do the right lymphatic duct & thoracic duct deal with?
1. No - they are OUTSIDE of sheath
2. breast cancer when they are ENLARGED
What makes up the triangular interval? include vessels and the borders?
- 3 borders (hint: what 2 heads of your triceps, & teres ____)
- 2 vessels (hint: deep/posterior N & A)
borders: teres MAJOR, lateral & long head of tricips
vessels: radial N. & profunda brachii A.
Biceps brachii is innervated by what nerve?
What are the actions??
Bonus: what does short head of bicips specifically help with?
Musculocutaneous N.
Action: flexion, supination
Short head - resists dislocation of shoulder!
What artery provides blood supply to the humeral head??
A) Brachial A
B) Circumflex A
C) Axillary A.
D) Radial A.
B)Circumflex A
anterior & posterior!