Ch.97 Humerus Flashcards
Where is the bicipital bursa
Intertubercular groove
What forms the inter tubercular groove
Greater
Intermediate
Lesser Tubercles
What tendon glides over the tubercular groove
Biceps brachii tendon
What are the origins and insertions of the collateral ligs of the shoulder joint
Doesn’t have any
infraspinatus and supraspinatus act as collaterals
What stabilises the shoulder joint
Supraspinatus
Infraspinatus
Both insert on greater tubercle
Where is the deltoid tuberosity
Craniolateral surface at the junction of the proximal and middle third of the bones length
Function of the deltoid m
Flex shoulder
Forelimb abduction
What attaches and inserts on the deltoid tuberosity
O: Deltoid
I: Superficial Pectoral (adductor of forelimb)
Origin, insertion of brachialis m
O: Caudoproximal humerus musculospiral groove
I: Craniomedial radius
Radial nerve path
Runs with brachial artery supplying triceps then travels
->Between long and medial heads of triceps
-> Caudal border of brachialis m
->Medial to caudal in mid diaphysis
->Lateral just proximal to epicondyle
->Cranial over cubital joint
What does the radial n innervate
All extensor m distal to the shoulder
Blood supply to shoulder
Axillary a
Branches to Brachial a. at scapulohumeral joint
External jugular v -> cephalic v btw brachiocephalicus and descending pectoral muscles
What inserts on the osseous ridge of the humerus and what’s its function
Brachiocephalicus
Advances forelimb
Which epicondyle is smoothly scooping and which is prominent and square shaped
Lat - Smooth
Med - Square
What forms the olecranon fossa
Space between the epicondyles
