Podcast
Questions and Answers
What are the two primary bones that articulate to form the shoulder joint?
What are the two primary bones that articulate to form the shoulder joint?
- Humerus and ulna
- Scapula and clavicle
- Humerus and scapula (correct)
- Clavicle and radius
What is another name for the shoulder joint?
What is another name for the shoulder joint?
- Glenohumeral joint (correct)
- Humeroscapular joint
- Acromioclavicular joint
- Subacromial joint
What characteristic makes the shoulder joint highly mobile?
What characteristic makes the shoulder joint highly mobile?
- The presence of ligaments
- The length of the humerus
- The shallow glenoid cavity (correct)
- The type of cartilage present
What is the shape of the head of the humerus?
What is the shape of the head of the humerus?
What structure is located between the greater and lesser tubercles of the humerus?
What structure is located between the greater and lesser tubercles of the humerus?
Which of the following statements is true about the shoulder joint?
Which of the following statements is true about the shoulder joint?
What is the smaller prominence located medially to the head of the humerus called?
What is the smaller prominence located medially to the head of the humerus called?
What is the anatomical term for the long bone of the arm?
What is the anatomical term for the long bone of the arm?
What is the location of the anatomical neck of the humerus in relation to the tubercles?
What is the location of the anatomical neck of the humerus in relation to the tubercles?
Why is the surgical neck of the humerus named as such?
Why is the surgical neck of the humerus named as such?
What structure is located at the lateral side of the anterior aspect of the distal end of the humerus?
What structure is located at the lateral side of the anterior aspect of the distal end of the humerus?
Which part of the humerus articulates with the head of the radius?
Which part of the humerus articulates with the head of the radius?
What is the medial epicondyle of the humerus primarily known for?
What is the medial epicondyle of the humerus primarily known for?
What is the purpose of the deltoid tuberosity on the humerus?
What is the purpose of the deltoid tuberosity on the humerus?
What is the shape of the trochlea, and what does this imply about its function?
What is the shape of the trochlea, and what does this imply about its function?
What surfaces divide the anterior aspect of the shaft of the humerus?
What surfaces divide the anterior aspect of the shaft of the humerus?
Flashcards
Humerus
Humerus
The long bone of the upper arm.
Scapula
Scapula
The shoulder blade.
Head of the humerus
Head of the humerus
The rounded, dome-shaped end of the humerus that articulates with the glenoid cavity.
Glenoid cavity
Glenoid cavity
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Greater tubercle
Greater tubercle
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Lesser tubercle
Lesser tubercle
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Intertubercular sulcus
Intertubercular sulcus
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Shoulder joint (glenohumeral joint)
Shoulder joint (glenohumeral joint)
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Anatomical neck of the humerus
Anatomical neck of the humerus
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Surgical neck of the humerus
Surgical neck of the humerus
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Shaft or body of the humerus
Shaft or body of the humerus
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Deltoid tuberosity
Deltoid tuberosity
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Radial fossa
Radial fossa
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Coronoid fossa
Coronoid fossa
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Capitulum
Capitulum
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Trochlea
Trochlea
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Study Notes
Humerus and Scapula Bones of the Shoulder Joint
- The humerus (long bone of the arm) and scapula (shoulder blade) articulate to form the shoulder joint (glenohumeral joint).
- The shoulder joint is highly mobile but also unstable, prone to dislocation.
- The head of the humerus is dome-shaped and articulates with the glenoid cavity of the scapula.
Humerus Anatomy (Anterior View)
- Head: Dome-shaped, angled from the shaft, articulates with the glenoid cavity.
- Greater Tubercle: Prominence lateral to the head, forms a crest.
- Lesser Tubercle: Smaller prominence medial to the head, forms a crest.
- Intertubercular Sulcus (Bicipital Groove): Groove between the tubercles, houses the proximal tendon of the biceps brachii muscle.
- Anatomical Neck: Ring-like structure around the humeral head, proximal to tubercles.
- Surgical Neck: Narrow region distal to the tubercles, fracture-prone.
- Shaft (Body): The main portion of the bone. Anterior surface can be divided into anteromedial and anterolateral portions from the crest of the greater tubercle to the distal end.
- Deltoid Tuberosity: Roughened prominence on the lateral midshaft, where the deltoid muscle attaches.
- Radial Fossa: Depression on the lateral aspect of the distal end, accommodates the head of the radius.
- Coronoid Fossa: Depression on the medial aspect of the distal end, accommodates the coronoid process of the ulna.
- Capitulum: Landmark that articulates with the head of the radius.
- Trochlea: Landmark that articulates with the ulna. Its shape resembles a pulley.
- Medial Epicondyle: Prominent expansion on the medial aspect of the distal end, attachment for anterior (flexor) forearm muscles.
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Description
Test your knowledge about the humerus and scapula anatomy, focusing on their structures and the formation of the shoulder joint. This quiz covers key features like the head, tubercles, and the anatomical and surgical necks of the humerus. Understand the functional aspects of the shoulder joint's mobility and stability.
