Podcast
Questions and Answers
What is the primary action of the trapezius muscle?
What is the primary action of the trapezius muscle?
- Adducts and flexes the humerus.
- Extends and laterally rotates the neck.
- Depresses and protracts the scapula.
- Elevates, retracts, and rotates the scapula. (correct)
Which of the following structures is NOT an insertion point of the trapezius muscle?
Which of the following structures is NOT an insertion point of the trapezius muscle?
- Spine of the scapula
- Acromion
- Medial border of the scapula (correct)
- Lateral clavicle
Which nerve provides motor innervation to the trapezius muscle?
Which nerve provides motor innervation to the trapezius muscle?
- Axillary nerve
- Long thoracic nerve
- Spinal root of Cranial Nerve XI and spinal nerves C3-C4 (correct)
- Musculocutaneous nerve
What are the origin points of the trapezius muscle?
What are the origin points of the trapezius muscle?
If a patient experiences difficulty shrugging their shoulders and rotating the scapula, which nerve might be compromised?
If a patient experiences difficulty shrugging their shoulders and rotating the scapula, which nerve might be compromised?
Flashcards
Trapezius
Trapezius
A major muscle located in the upper back and neck, originating from the ligamentum nuchae and spines of C7–T12.
Origin of Trapezius
Origin of Trapezius
Ligamentum nuchae and spines of vertebrae C7–T12.
Insertion of Trapezius
Insertion of Trapezius
Attaches to the lateral clavicle, acromion, and spine of the scapula.
Action of Trapezius
Action of Trapezius
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Innervation of Trapezius
Innervation of Trapezius
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Study Notes
Trapezius Muscle
- Originates from the ligamentum nuchae and the spines of vertebrae C7 to T12.
- Inserts into the lateral clavicle, acromion, and spine of the scapula.
- Function: Elevates, retracts, and rotates the scapula.
- Innervation: Cranial nerve XI (spinal accessory) and spinal nerves C3 to C4.
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