Elbow and Forearm Region Bony/True Joints Flashcards
humeroulnar or trochlear joint degrees of freedom
1
humeroulnar or trochlear joint capsular pattern
flexion and extension
humeroulnar or trochlear joint CPP
extension with supination
humeroulnar or trochlear joint OPP
70° flexion, 10° supination
humeroulnar or trochlear joint articulating surfaces
trochlea of the humerus to trochlear notch of the ulna
elbow joint type of joint
synovial diarthrodial hinged/ginglymus joint
humeroulnar or trochlear joint ligaments
medial/ulnar collateral ligament (MCL)
3 sets: anterior, intermediate, and transverse or posterior fibers
MCL attachments
to the medial epicondyle - olecranon process to the coronoid process
elbow joint osteokinematics
flexion and extension
humeroulnar or trochlear joint arthrokinematics
concave: ulnar trochlear notch
convex: humeral trochlea
elbow joint plane and axis
sagittal plane (x-axis)
elbow joint muscles
flexors: brachialis, biceps brachii, brachioradialis, pronator teres
extensors: triceps, anconeus
humeroradial joint degrees of freedom
1
humeroradial joint capsular pattern
flexion, extension, supination, pronation
humeroradial joint CPP
elbow flexed to 90°, forearm supinated to 5°
humeroradial joint OPP
full extension and full supination
humeroradial joint articulating surfaces
capitulum of humerus to fovea of radius
humeroradial joint ligaments
lateral/radial collateral ligaments (LCL)
3 sets: anterior, intermediate or transverse, and posterior fibers
LCL attachments
lateral epicondyle to the upper margin of the annular ligament
humeroradial joint arthrokinematics
concave: radial surface
convex: capitulum
elbow joint arthrokinematics
anterior roll and anterior slide
posterior roll and posterior slide
proximal radioulnar joint capsular pattern
equal limitation of supination and pronation
proximal radioulnar joint CPP
5° supination
proximal radioulnar joint OPP
70° flexion, 35° supination
proximal radioulnar joint articulating surfaces
head of radius and annular ligament to the radiual notch of the ulna
proximal radioulnar joint type of joint
synovial diarthrodial pivot/trochoid joint
proximal radioulnar joint ligaments
annular ligament, quadrate ligament, oblique ligament
annular ligament attachments
anterior and posterior margins of the radial notch on the ulna to the head of the radius
quadrate ligament attachments
below the radial notch of the ulna to the medial surface of the neck of the radius
oblique ligament attachments
lateral side of the ulnar tuberosity to just distal to the bicipital tuberosity
proximal radioulnar joint osteokinematics
pronation and supination
proximal radioulnar joint arthrokinematics
pronation: anterior spin
supination: posterior spin
(radial head moves)
proximal radioulnar joint plane and axis
transverse plane (y-axis)
distal radioulnar joint articulating surfaces
rounded head of the ulna and the ulnar notch of the radius
distal radioulnar joint type of joint
synovial diarthrodial pivot/trochoid joint
distal radioulnar joint ligaments
anterior (palmar) distal radioulnar ligament and posterior (dorsal) radioulnar ligament
anterior (palmar) distal radioulnar ligament attachments
anterior aspect of the radioulnar joint
posterior (dorsal) distal radioulnar ligament attachments
dorsal aspect of the radioulnar joint
distal radioulnar joint osteokinematics
pronation and supination
distal radioulnar joint plane and axis
transverse plane (y-axis)
proximal and distal radioulnar joint muscles
pronators: pronator teres, pronator quadratus
supinators: biceps brachii and supinator