Podcast
Questions and Answers
Which nerve innervates both the triceps brachii and anconeus muscles?
Which nerve innervates both the triceps brachii and anconeus muscles?
- Axillary nerve
- Radial nerve (correct)
- Ulnar nerve
- Median nerve
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?
- Brachialis
- Biceps brachii
- Coracobrachialis
- Triceps brachii (correct)
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?
- Olecranon of the ulna
- Posterior surface of the humerus, inferior to the radial groove
- Infraglenoid tubercle of the scapula (correct)
- Lateral epicondyle of the humerus
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?
Which of these options is NOT an origin of the triceps brachii?
Which of these options is NOT an origin of the triceps brachii?
Flashcards
Triceps Brachii
Triceps Brachii
A muscle composed of three heads that extends the forearm at the elbow.
Long Head of Triceps
Long Head of Triceps
Originates from the infraglenoid tubercle of the scapula and assists in stabilizing the humerus.
Lateral Head of Triceps
Lateral Head of Triceps
Located on the posterior surface of the humerus, it contributes to elbow extension.
Anconeus Muscle
Anconeus Muscle
Signup and view all the flashcards
Radial Nerve
Radial Nerve
Signup and view all the flashcards
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
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
