Pass Me the Joint
The humeroulnar joint is this type of joint.
What is a hinge joint?
This muscle is responsible for abducting the arm at the shoulder and is divided into anterior, middle, and posterior fibers.
What is the deltoid?
This structure makes up the superior border of the triangular interval/hiatus?
What is the teres major?
The axillary artery passes this landmark to become the brachial artery.
What is the inferior border of teres major?
This muscle inserts on the corocoid process of the scapula and is responsible for stabilizing the scapula and drawing it inferiorly and anteriorly against the thoracic wall.
What is the pectoralis minor?
These three carpal bones articulate with the distal end of the radius to form the radiocarpal joint.
What are the scaphoid, lunate, and triquetrum?
This rotator cuff muscle is the only in its group to not insert on the greater tubercle of the humerus.
What is the subscapularis muscle?
Fracturing this portion of the humerus causes disruption of blood supply to the humeral head which can lead to avascular necrosis
What is the anatomical neck of the humerus?
This nerve innervates all of the intermediate and superficial anterior forearm muscles (except 1).
What is the median nerve?
This surface of the clavicle is convex to allow for mediastinal vessels to pass behind it.
What is the anteromedial border of the clavicle?
The suprascapular nerve runs through this landmark on the scapular before innervating the infraspinatus and supraspinatus muscles.
What is the suprascapular notch?
This intrinsic hand muscle group originates from the tendons of the flexor digitorum profundus and helps flex the MCP joints while extending the IP joints.
What are the lumbricals?
This structure passes through the quadrangular space along with the posterior humeral circumflex a.
What is the axillary nerve?
This nerve arises from the C5, C6, and C7 roots and innervates the serratus anterior muscle, playing a key role in preventing "winging" of the scapula.
What is the long thoracic nerve?
This nerve innervates all the hypothenar muscles of the hand.
What is the deep branch of the ulnar nerve?
This pivot joint, held in place by the annular ligament, allows for pronation and supination of the forearm
What is the proximal radioulnar joint?
This thenar muscle inserts on the base of the 1st metacarpal and NOT the base of the 1st proximal phalanx. (abductor pollicis brevis, flexor pollicis brevis, opponens pollicis, or adductor pollicis)
What is the opponens pollicis?
Tennis elbow is attributed to inflammation of these 2 posterior forearm muscles.
What is extensor carpi radialis longus and brevis?
What muscle does the radial nerve pierce to become the posterior interosseous nerve?
What is the supinator?
These 2 muscles, often referred to as "big brother and little brother" have the exact same actions: shoulder extension, medial rotation of shoulder, and shoulder ADDuction.
What are the teres major and the latissimus dorsi?
The radiocarpal joint allows for these two types of angular movements, which are resisted by the radial and ulnar collateral ligaments of the wrist
What is radial and ulnar deviation? OR what is wrist abduction and adduction?
These 3 muscles are responsible for superior rotation of the glenoid fossa scapula.
What are the serratus anterior, latissimus dorsi, and trapezius muscles?
Carpal tunnel syndrome is caused by inflammation of the flexor digitorum profundus and/or superficialis, compressing this nerve.
What is the median nerve?
This forearm muscle has dual innervation, with the medial 2 tendons innervated by the ulnar n. and the lateral 2 innervated by the anterior interosseous n.
What is flexor digitorum profundus?
This portion of the trochlea is responsible for creating the natural valgus angle of the elbow, which sits at 10-15º in males and ~15º in females?
What is the medial lip of the trochlea?