Musculus serratus posterior superior

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 posterior serratus muscles classified as due to their origin and attachment?

• Autochthonous muscles

• Spino costal muscles

• Primary back muscles

• Respiratory muscles

Which vertebrae does the posterior superior serratus muscle originate from?

• TH3 to TH7

• C1 to C5

• C6 to TH2

• L1 to L5

What nerve is responsible for the innervation of the posterior superior serratus muscle?

• Phrenic nerve

• Sciatic nerve

• Vagus nerve

• Intercostal nerve

How does the serratus posterior superior muscle contribute to respiration?

• By expanding the diaphragm

• By compressing the lungs

• By contracting the abdominal muscles

• By lifting the ribs

What effect does bilateral tension of the serratus posterior superior muscle have on the thoracic spine?

• It stretches the thoracic spine

• It flexes the thoracic spine

• It rotates the spine to the ipsilateral side

• It compresses the thoracic spine