Questions and Answers
What is the term for the upper end of the humerus that articulates with the scapula?
What is the function of the greater tubercle?
muscle attachment
What is the lesser tubercle associated with?
muscle attachment
What is the purpose of the deltoid tuberosity?
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What does the capitulum articulate with?
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What is the trochlea's primary function?
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What is located in the olecranon fossa?
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What do you find in the coronoid fossa?
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Study Notes
Humerus Bone Markings
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Head of Humerus: Rounded proximal end that articulates with the glenoid cavity of the scapula, forming the shoulder joint.
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Greater Tubercle: Large, lateral projection located below the head; serves as an attachment point for the rotator cuff muscles, specifically the supraspinatus, infraspinatus, and teres minor.
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Lesser Tubercle: Smaller, anterior projection situated below the head; primarily serves as an attachment point for the subscapularis muscle.
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Deltoid Tuberosity: Rough, raised area on the lateral surface of the humerus; provides an attachment site for the deltoid muscle which is crucial for shoulder abduction.
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Capitulum: Rounded knob-like structure on the distal end of the humerus; articulates with the head of the radius, allowing for elbow joint movement.
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Trochlea: spool-shaped structure located medial to the capitulum; articulates with the ulna, forming a hinge joint crucial for flexion and extension of the elbow.
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Olecranon Fossa: Deep triangular depression on the posterior aspect of the distal humerus; accommodates the olecranon process of the ulna during elbow extension.
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Coronoid Fossa: Smaller depression located anteriorly above the trochlea; receives the coronoid process of the ulna during elbow flexion.
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Test your knowledge on the markings of the humerus bone with this quiz! Each flashcard presents a term related to the anatomy of the humerus, helping you master the necessary vocabulary for your studies. Perfect for anatomy students and enthusiasts alike.
