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Questions and Answers
Which muscle is responsible for the protraction of the scapula from the upper 8 ribs?
Which muscle is responsible for the protraction of the scapula from the upper 8 ribs?
- Pectoralis minor
- Subclavius
- Serratus anterior (correct)
- Pectoralis major
Which muscle stabilizes the clavicle during movement of the shoulder girdle?
Which muscle stabilizes the clavicle during movement of the shoulder girdle?
- Serratus anterior
- Pectoralis minor
- Subclavius (correct)
- Pectoralis major
Which muscle is responsible for protraction and depression of ribs 3, 4, and 5?
Which muscle is responsible for protraction and depression of ribs 3, 4, and 5?
- Pectoralis major
- Subclavius
- Serratus anterior
- Pectoralis minor (correct)
Which muscle is responsible for adduction, flexion, and medial rotation of the shoulder joint?
Which muscle is responsible for adduction, flexion, and medial rotation of the shoulder joint?
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Which structure lies deep to the Pectoralis major and fills the gap between Pectoralis minor and subclavius?
Which structure lies deep to the Pectoralis major and fills the gap between Pectoralis minor and subclavius?
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Study Notes
Scapula Protraction
- The serratus anterior muscle is responsible for the protraction of the scapula, originating from the upper 8 ribs.
Clavicle Stabilization
- The subclavius muscle stabilizes the clavicle during shoulder girdle movements, ensuring proper positioning and function.
Rib Movement
- The pectoralis minor muscle contributes to the protraction and depression of ribs 3, 4, and 5, playing a role in respiratory mechanics.
Shoulder Joint Functions
- The pectoralis major muscle is responsible for adduction, flexion, and medial rotation of the shoulder joint, facilitating various arm movements.
Anatomy Under Pectoralis Major
- The coracoid process structure lies deep to the pectoralis major, filling the space between the pectoralis minor and the subclavius muscle.
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