Humeroulnar, Proximal Radioulnar Joints Flashcards
All muscles that act about the elbow flex and extend the joint originate either on the…
Humerus or Scapula
The insertion point for all these muscles is either…
Radius or Ulna
Biarticular muscles originate on the _____ and insert on either the ____ or ____.
Scapula
radius
ulna
What muscle is considered a multiarticular muscle?
Biceps Brachii
The elbow is designed for what?
Change the distance of the hand from the body.
The forearm is designed to…
It pivot and rotate to change the orientation of the arm.
The wrist is designed to do…
wrist flexion, extension, and deviation BUT does not rotate.
Which epicondyle is larger? And where are they located?
Medial is larger
Located at distal end of humerus
What are the important landmarks of the distal humerus?
- Medial and lateral epicondyles
- Trochlea-articulates with trochlear notch of ulna(forms humeroulnar jt)
- Coronoid Fossa (accepts coronoid process of ulna during flexion)
- Olecranon Fossa (accepts olecranon proces during flexion)
- Capitulum (articulates with radial head)
- Lateral & Medial Condyloid Ridge
Important landmarks of the Proximal Ulna?
Coronoid Process
Trochlear Notch
Olecranon Process
Important Landmarks on the Proximal Radius?
Radial Head
Radial Tuberosity
What joint is the Humeroulnar joint?
Hinge joint (ginglymus)
What joint is the Radioulnar joint?
Pivot joint (trochiod)
Annular Ligament
Holds the radial head in place during pro/sup
Movement of the _____ _____ is a _____ motion that allows the radius to rotate around the ulna thereby producing radioulnar/forearm _____ and _____.
radial head, pivot, pronation, subornation