Questions and Answers
Which muscles are responsible for moving the pectoral girdle? (Select all that apply)
What is the origin of the Pectoralis Minor?
Sternal ends of upper ribs
What action does the Pectoralis Minor perform?
Pulls scapula forward and downward, raises ribs
What is the insertion point of the Serratus Anterior?
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What is the action of the Serratus Anterior?
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What is the origin of the Trapezius?
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What actions does the Trapezius perform?
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Where does the Levator Scapulae insert?
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What is the action of the Levator Scapulae?
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What is the origin of Rhomboid major?
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What action does Rhomboid major perform?
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What is the origin of Rhomboid minor?
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What actions does Rhomboid minor perform?
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Study Notes
Muscles that Move the Pectoral Girdle
- Includes key muscles: Pectoralis Minor, Serratus Anterior, Trapezius, Levator Scapulae, and Rhomboid major and minor.
Pectoralis Minor
- Originates from the sternal ends of the upper ribs.
- Inserts at the coracoid process of the scapula.
- Functions to pull the scapula forward and downward while also raising the ribs.
Serratus Anterior
- Originates from the outer surface of upper ribs located on the side of the chest.
- Inserts on the ventral surface of the scapula.
- Responsible for pulling the scapula down and forward, aiding in thrusting the shoulders forward.
Trapezius
- Originates from the occipital bone and spines of cervical and thoracic vertebrae.
- Inserts at the clavicle, spine, and acromion process of the scapula.
- Allows for the rotation, elevation, and depression of the scapula.
Levator Scapulae
- Originates from the transverse processes of cervical vertebrae C1-C4.
- Inserts along the medial margin of the scapula.
- Primarily elevates the scapula.
Rhomboid Major
- Originates from the spines of superior thoracic vertebrae.
- Inserts on the medial border of the scapula.
- Functions to retract the scapulae.
Rhomboid Minor
- Originates from the spines of the C7 vertebra.
- Inserts on the medial border of the scapula.
- Works to retract and elevate the scapulae.
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Description
Test your knowledge on the muscles involved in moving the pectoral girdle. This quiz covers key muscles like the Pectoralis Minor and Serratus Anterior, including their origins, insertions, and actions. Perfect for students of anatomy and physiology.
