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Questions and Answers
What is the primary action of the Serratus Posterior Inferior muscle?
What is the primary action of the Serratus Posterior Inferior muscle?
- Rotates the spine
- Stabilizes the pelvis
- Depresses the ribs (correct)
- Elevates the ribs
Which of the following is the correct origin site of the Serratus Posterior Inferior?
Which of the following is the correct origin site of the Serratus Posterior Inferior?
- Spines of L3–L5
- Spines of T11–L2 (correct)
- Spines of T5–T10
- Spines of T1–T4
What is the innervation of the Serratus Posterior Inferior muscle?
What is the innervation of the Serratus Posterior Inferior muscle?
- Cervical nerves C1–C4
- Intercostal nerves T6–T9
- Intercostal nerves T1–T5
- Intercostal nerves T9–T12 (correct)
Where does the Serratus Posterior Inferior insert?
Where does the Serratus Posterior Inferior insert?
Which of the following muscles is responsible for rib depression?
Which of the following muscles is responsible for rib depression?
Flashcards
Serratus Posterior Inferior Origin
Serratus Posterior Inferior Origin
Originates from the spines of vertebrae T11 to L2.
Serratus Posterior Inferior Insertion
Serratus Posterior Inferior Insertion
Inserts along the inferior border of ribs 8 to 12.
Serratus Posterior Inferior Action
Serratus Posterior Inferior Action
The primary action is to depress the ribs.
Innervation of Serratus Posterior Inferior
Innervation of Serratus Posterior Inferior
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Function in Breathing
Function in Breathing
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Study Notes
Serratus Posterior Inferior Muscle
- Origin: Spinous processes of vertebrae T11 through L2.
- Insertion: Inferior border of ribs 8 through 12.
- Action: Depresses the ribs.
- Innervation: Intercostal nerves T9 through T12.
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