Musculus serratus posterior inferior

The video tutorial discusses the serratus posterior muscles, focusing on their origin, attachment, and function. It explains how these muscles are involved in respiration and spine movement, highlighting their role in lowering ribs and aiding expiration. The tutorial also covers the embryogenesis and innervation of these muscles, emphasizing their importance in stabilizing and mobilizing the spine.

What are the two muscles that make up the group of serratus posterior muscles?

• Serratus posterior superior and latissimus dorsi

• Serratus anterior and serratus posterior inferior

• Serratus posterior superior and serratus posterior inferior

• Serratus anterior and serratus posterior superior

Where does the serratus posterior inferior muscle originate?

• Spinous processes of vertebrae C7 to T3

• Spinous processes of vertebrae L1 to L5

• Spinous processes of vertebrae T1 to T4

• Spinous processes of vertebrae T11 to L2

Which nerves innervate the serratus posterior inferior muscle?

• Intercostal nerves

• Cranial nerves

• Anterior rami of the spinal nerves

• Posterior rami of the spinal nerves

What is the primary function of the serratus posterior inferior muscle?

• Flexing the spine

• Lowering the ribs

• Rotating the shoulder

• Elevating the ribs

How does the serratus posterior inferior muscle contribute to spine movement?

• It compresses the spine bilaterally.

• It extends the spine unilaterally.

• It flexes the spine bilaterally.

• It stretches the spine bilaterally and rotates it unilaterally.