Ulna Flashcards
Type of Bone
Long Bone
How to distinguish between Proximal and Distal
Proximal End is Wider
How to distinguish between Anterior and Posterior
Anterior view shows Trochlear Notch
What are the 5 Associated Joints
Humeroulnar Proximal Radioulnar Mid-Radioulnar Distal Radioulnar Ulnomeniscotriquetral
What are the articulating surfaces in the Humeroulnar Jt
Trochlea of the Humerus
Trochlear Notch of Ulna
What are the articulating surfaces in the Ulnomeniscotriquetral Jt
Distal Ulna and the Triquetral Carpal sandwiching a fibrocartilage disc/meniscus
Associated Muscle Actions (7)
Wrist Extensors (Extensor Carpi Ulnaris) Wrist Flexors (Flexor Digitorum Profundus) Ulnar Deviation (Flexor Carpi Ulnaris) Pronation (Pronator Quadratus) Supination (Supinator) Elbow Flexors (Brachialis) Elbow Extensors (Anconeus)
What are the 3 Palpable Landmarks
Olecranon Process
Head
Styloid Process
Function of the Olecranon Process
Muscle Attachment (Triceps Brachii)
Location and Function of the Head
L: Distal end
F: Received by Ulnar Notch of Radius; Distal Joint Surface for UMT Jt
What are the 6 Non-Palpable Landmarks
Coronoid Process Trochlear Notch Radial Notch Ulnar Tuberosity Supinator Crest Interosseous Border
Location and Function of the Coronoid Process
L: Anterior lip on proximal shaft
F: Muscle Attachment (Brachialis)
Location and Function of Trochlear Notch
L: Between Olecranon Process and Coronoid Process
F: Receives Trochlea of Humerus in Humeroulnar Jt
Location and Function of Radial Notch
L: Proximal Lateral Shaft
F: Receives Head of the Radius in Proximal Radioulnar Jt
Location and Function of Ulnar Tuberosity
L: Anterior Proximal Shaft; Distal to Coronoid Process
F: Muscle Attachment (Brachialis)
