The video tutorial explores the posterior saw muscles, focusing on the serratus posterior inferior and superior muscles. It details their origins, attachments, and classification as spino costal muscles. The posterior superior serratus muscle is highlighted, including its embryonic development, innervation by intercostal nerves, and its role in spine mobility and respiration. The muscle aids in lifting the ribs for inspiration and contributes to thoracic spine movement.

What are the two muscles mentioned that are classified as posterior saw muscles?

Describe the origin and attachment points of the posterior superior serratus muscle.

Explain the significance of the spinal nerves in the function of the posterior superior serratus muscle.

What role does the posterior superior serratus muscle play in respiration?

How does unilateral tension in the posterior superior serratus muscle affect the spine?