5 Questions
What are the components of the elbow complex mentioned in the text?
Elbow joint (humeroulnar & humeroradial joints), radio ulnar joint (proximal & distal radioulnar joints)
How many degrees of freedom does the modified or loose hinge joint of the elbow joint complex have?
1 degree of freedom
What are the articulating surfaces of the humerus and radius & ulna mentioned in the text?
Humerus: trochlea, capitulum, trochlear groove, coronoid fossa, capitulotrochlear groove, radial fossa, olecranon fossa; Radius & ulna: trochlear notch, troclear ridge, trochlear groove, ulnar coronoid process, olecranon process, head of radius, fovea
What type of joint is the diarthrodial uniaxial joint of the pivot type in the radio ulnar joint?
Diarthrodial uniaxial joint of pivot type
What is the motion involved at the HU joint and HR joint of the elbow complex?
HU joint: sliding motion of ulnar trochlear ridge on humeral trochlear groove; HR joint: motion not specified in the given text
Study Notes
Elbow Complex Components
- The elbow complex consists of multiple joints: humero-ulnar joint (HU), humero-radial joint (HR), and proximal radio-ulnar joint (PRUJ)
Elbow Joint Characteristics
- The modified or loose hinge joint of the elbow joint complex has one degree of freedom
- The articulating surfaces of the humerus and radius & ulna are the trochlea of the humerus and the trochlear notch of the ulna, and the capitulum of the humerus and the head of the radius
Radio Ulnar Joint Characteristics
- The diarthrodial uniaxial joint of the pivot type in the radio ulnar joint is a pivot joint
Joint Motions
- The motion involved at the HU joint is flexion and extension
- The motion involved at the HR joint is flexion and extension
Test your knowledge on the articulation, stability, kinetics, and kinematics of the elbow joint complex. This quiz covers the joints and muscles serving the hand, as well as the mobility and stability required for skilled and forceful movements.
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