Serratus posterior superior muscle

The video tutorial discusses the serratus posterior superior muscle, a thin, superficial back muscle. It covers the anatomy, including its origin from the spinous processes and insertion on the ribs, and its function in elevating the ribs during inspiration. The tutorial explains the muscle's embryological development and nerve supply from the intercostal nerves. It highlights the muscle's role in stabilizing the vertebral column and thorax, supporting inspiration, and contributing to thoracic movement.

What are the serratus posterior muscles commonly referred to as due to their origin and insertion points?

• Intrinsic back muscles

• Spinal costal muscles

• Trapezius muscles

• Rhomboid muscles

Which vertebrae do the serratus posterior superior muscles originate from?

• C1 to C3

• C6 to T2

• T1 to T5

• L1 to L5

What is the primary function of the serratus posterior superior muscle during respiration?

• Stabilizes the scapula

• Rotates the vertebral column

• Elevates the ribs

• Depresses the ribs

From which nerves do the serratus posterior muscles receive their innervation?

• Brachial plexus

• Posterior branches of the spinal nerves

• Intercostal nerves

• Cranial nerves

What movement does unilateral contraction of the serratus posterior superior muscle cause?

• Lateral flexion to the same side

• Rotation to the opposite side

• Flexion of the thoracic vertebral column

• Extension of the thoracic vertebral column