Shoulder
What shoulder joint links the appendicular skeleton to the axial skeleton
Sc joint
What muscles originate at the common extensor tendon?
ECRB, ED, EDM, ECU
What are the arthrokinematics of flexion at the radiocarpal joint?
Anterior (volar) roll, posterior glide
What is the difference in flexion at the 1st MCP vs 5th MCP?
flexion increases progressively as we move towards the 5th digit -- tighter grip on ulnar side of hand
Muscle that originates at the inferior angle of the scapula
Teres major
What is the resting position of the scapula on the ipsilateral side of your dominant hand?
Depressed, downwardly rotated, anteriorly tilted
What are the arthrokinematics of elbow flexion at the humeroulnar joint
Anterior roll and glide -- concave on convex
What is the difference in the weight-bearing status of the radial vs ulnar side of the radiocarpal joint?
radial side carries 80% of axial load
ulnar side carries 20% of axial load
What is the difference in the function of FDP vs FDS?
FDP flexes DIP, FDS flexes PIP
Where do supraspinatus, infraspinatus, and teres minor insert
Facets of the greater tubercle
What 3 structures check external rotation at 0 degrees of abduction
Coracohumeral ligament, SGHL, subscapularis
What are active and passive stabilizers at the medial side of the elbow?
Flexor and pronator muscles via common flexor tendon
Ulnar collateral ligament (3 bundles -- ant, post, transverse)
What makes up the proximal vs distal radioulnar joints? (pivot joints)
proximal - head of radius and radial notch of ulna
distal - head of ulna and ulnar notch of radius
What is the difference between 1st CMC joint and 2-5 intermetacarpal joints when talking about joint classifications / types of joints?
1st CMC is saddle joint, 2-5 are plane synovial
3 muscles that insert onto the coracoid process
pec minor, biceps SH and coracobrachialis
What muscles are involved in the transverse plane force couple?
Subscapularis (ant) vs infraspinatus and teres minor (post)
What 4 structures make up the lateral ligament complex at the elbow?
radial collateral ligament, lateral ulnar collateral ligament, annular ligament, accessory lateral collateral ligament
What carpal bones make up the distal part of the radiocarpal joint?
Scaphoid, lunate, triquetrum (articulating with radius and articular disc proximally)
Name the contents of the 6 extensor tunnels
1 - APL, EPB
2 - ECRL, ECRB
3 - EPL
4 - ED, EI
5 - EDM
6 - ECU
Actions of the lats
shoulder extension, adduction and IR
What is the result of a disruption of the frontal plane force couple?
Superior migration of humeral head
What parts of the radius, ulna, and humerus articulate to form the humeroulnar and humeroradial joints? (hinge joints)
trochlea and trochlear notch of ulna
capitulum and head of radius
Name the areas of entrapment of the ulnar and median nerves.
ulnar - arcade of struthers, cubital tunnel, guyon’s tunnel
median - carpal tunnel, heads of pronator teres
What ligaments are present at the MCP joints?
2 collateral ligaments (resist abd/add), 2 accessory ligaments (hold volar plate against volar MC head in flexion), 1 volar plate (prevent flexor tendon pinching in flexion, resist hyperextension)
Hand muscles innervated by the median nerve
LOAF