Podcast
Questions and Answers
Which of the following muscles is located on the anterior aspect of the arm, beneath the biceps?
Which of the following muscles is located on the anterior aspect of the arm, beneath the biceps?
- Biceps brachii
- Brachioradialis
- Triceps brachii
- Brachialis (correct)
The brachialis muscle's action is primarily shoulder adduction.
The brachialis muscle's action is primarily shoulder adduction.
False (B)
What specific bony landmark serves as the distal attachment point for the brachialis muscle?
What specific bony landmark serves as the distal attachment point for the brachialis muscle?
ulnar tuberosity and coronoid process
The long head of the triceps brachii originates from the infra-glenoidal tubercle of the ______.
The long head of the triceps brachii originates from the infra-glenoidal tubercle of the ______.
Match each head of the triceps brachii with its respective origin:
Match each head of the triceps brachii with its respective origin:
Which of the following is the primary action facilitated by all three heads of the triceps brachii?
Which of the following is the primary action facilitated by all three heads of the triceps brachii?
The medial head of the triceps brachii is not involved in elbow extension.
The medial head of the triceps brachii is not involved in elbow extension.
Clinically, what specific nerve's path is relevant to the triceps brachii, making it susceptible to injury alongside the muscle?
Clinically, what specific nerve's path is relevant to the triceps brachii, making it susceptible to injury alongside the muscle?
The long head of the triceps brachii is biarticular, meaning it crosses two joints: the shoulder and the ______.
The long head of the triceps brachii is biarticular, meaning it crosses two joints: the shoulder and the ______.
Which clinical sign might indicate pathology involving the triceps brachii?
Which clinical sign might indicate pathology involving the triceps brachii?
Flashcards
Triceps brachii location
Triceps brachii location
The triceps brachii is located in the posterior compartment of the arm.
Triceps brachii heads
Triceps brachii heads
The three heads are 1-Long head, 2-Lateral head, 3-Medial head.
Long head articulation
Long head articulation
The long head crosses both the shoulder and elbow joints.
Triceps function at elbow
Triceps function at elbow
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Long head function at the shoulder
Long head function at the shoulder
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Lateral/Medial head orgin
Lateral/Medial head orgin
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Long head origin
Long head origin
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Triceps examination
Triceps examination
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Study Notes
- Triceps brachii is located on the posterior face of the arm
- The triceps brachii has three heads
- The three heads are the long head, lateral head, and medial head
Origin
- Long head originates from the infraglenoid tubercle of the scapula
- Lateral and medial heads originate from the posterior face of the humerus, both proximal and distal to the radial nerve groove
Insertion
- Inserts on the proximal face of the olecranon of the ulna
Action
- At the shoulder, the long head participates in extension and adduction
- At the elbow, all three heads contribute to extension
Clinic
- Distal tendon lesion
- Radial nerve pathway
- Tendon palpation can reveal the medial ulnar nerve
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