Podcast
Questions and Answers
Which nerve innervates both the triceps brachii and anconeus muscles?
Which nerve innervates both the triceps brachii and anconeus muscles?
If a patient has difficulty extending their forearm at the elbow, which muscle would most likely be affected?
If a patient has difficulty extending their forearm at the elbow, which muscle would most likely be affected?
The long head of the triceps brachii originates from which specific anatomical landmark?
The long head of the triceps brachii originates from which specific anatomical landmark?
Besides assisting in elbow extension, which additional action is attributed to the anconeus muscle?
Besides assisting in elbow extension, which additional action is attributed to the anconeus muscle?
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Which of these options is NOT an origin of the triceps brachii?
Which of these options is NOT an origin of the triceps brachii?
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Study Notes
Triceps Brachii
- Origin: long head - infraglenoid tubercle of scapula; lateral head - posterior surface of humerus; medial head - posterior surface of humerus, inferior to radial groove
- Insertion: posterior surface of olecranon of ulna and fascia of forearm
- Nerve supply: radial nerve (C6-C8)
- Action: extends forearm at elbow; chief extensor of elbow; steadies head of abducted humerus (long head)
Anconeus
- Origin: lateral epicondyle of humerus
- Insertion: lateral surface of olecranon and superior part of posterior surface of ulna
- Nerve supply: radial nerve (C6-C8)
- Action: assists triceps in extending elbow; abducts ulna during
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Description
Test your knowledge on the anatomy of the triceps brachii and anconeus muscles. This quiz covers their origins, insertions, nerve supplies, and actions. Perfect for students studying human anatomy or preparing for anatomy exams.
