Questions and Answers
Which bone is more mobile and shorter than the ulna?
Radius
Which bone articulates with the capitulum of the humerus to perform flexion/extension?
Radius
Which bone articulates with the notch of the ulna to perform rotation (pronation/supination)?
Radius
Which bone has a boney process called the Radial Styloid?
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Which bone has a boney process called Lister's Tubercle?
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Which bone has a boney process called the Styloid Process?
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Which bone has a boney process that projects distally off the ulnar head?
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Which bone articulates with the base of the radius to form the distal radioulnar joint?
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Which bone has a boney process called the Coronoid Process?
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Which bone has a boney process that projects distally off the distal end of the lateral radius?
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Which bone is longer, the radius or the ulna?
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Which bone of the forearm has a stabilization role?
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What is the name of the connective tissue band between the ulna and radius?
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What is the name of the bony eminence located on the proximal end of the ulna?
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What is the purpose of the trochlear notch on the ulna?
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Where is the radial notch located?
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What is the function of the interosseous membrane?
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What is the role of the ulna in the forearm?
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What is the name of the depression formed by the olecranon and coronoid process?
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What joints do the ulna and radius articulate with each other?
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Which structure is located on the anterior surface of the radius, approximately an inch distal to the radial head?
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When palpating the styloid process of the radius, which patient position should be used?
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Which structure articulates with the ulna to form a syndesmotic joint?
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When palpating Listers tubercle, where should the palpation be performed?
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Which structure acts as an anatomical block during radial deviation and serves as an attachment for the radial collateral ligament of the wrist?
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Where is the shaft of the radius located?
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Which structure is located proximally along the shaft of the radius and becomes deep to muscular tissue 2/3's proximally?
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Which patient position should be used when palpating the head of the ulna?
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Which structure is located on the middle of the base of the radius, on the dorsal side?
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When palpating the radial tuberosity, what movement should be used to confirm the location?
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Study Notes
Forearm Bones
- The radius is more mobile and shorter than the ulna.
Articulations
- The radius articulates with the capitulum of the humerus to perform flexion/extension.
- The radius articulates with the notch of the ulna to perform rotation (pronation/supination).
Boney Processes
- The radius has a boney process called the Radial Styloid.
- The radius has a boney process called Lister's Tubercle.
- The ulna has a boney process called the Styloid Process.
- The ulna has a boney process that projects distally off the ulnar head.
Joints
- The radius articulates with the base of the radius to form the distal radioulnar joint.
Boney Landmarks
- The ulna has a boney process called the Coronoid Process.
- The radius has a boney process that projects distally off the distal end of the lateral radius.
Forearm Structure
- The ulna is longer than the radius.
- The ulna has a stabilization role in the forearm.
Connective Tissue
- The interosseous membrane is the connective tissue band between the ulna and radius.
Ulnar Landmarks
- The olecranon is the bony eminence located on the proximal end of the ulna.
- The trochlear notch is located on the proximal end of the ulna and forms the elbow joint.
Functional Roles
- The interosseous membrane provides stability to the forearm.
- The ulna acts as a stabilizer in the forearm.
Palpation
- The radial notch is located on the proximal end of the ulna.
- The radial head should be palpated with the patient's arm in flexion.
- Lister's tubercle should be palpated on the dorsal surface of the radius.
- The radial styloid process should be palpated with the patient's arm in radial deviation.
Other
- The radial tuberosity is located on the medial surface of the radius and should be palpated during rotation.
- The shaft of the radius is located in the middle of the forearm.
- The radial neck is located proximally along the shaft of the radius.
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