Spinal cord in situ

The video tutorial discusses the serratus anterior muscle, a fan-shaped muscle located at the lateral wall of the thorax. It details the muscle's origin from the 1st to 9th ribs and its insertion at the scapula. The muscle is divided into three parts: superior, intermediate, and inferior, each with specific roles. The serratus anterior is innervated by the long thoracic nerve and plays a crucial role in scapula movement and stabilization. It also assists in lifting the ribs during inspiration. The video concludes with a call to explore more anatomy resources on Kenhub.

Where is the serratus anterior muscle primarily located?

• On the posterior wall of the thorax

• On the anterior wall of the thorax

• On the lateral wall of the thorax

• On the medial wall of the thorax

Which ribs does the superior part of the serratus anterior muscle originate from?

• 2nd to 3rd ribs

• 1st to 2nd ribs

• 4th to 9th ribs

• 1st to 9th ribs

What nerve supplies innervation to the serratus anterior muscle?

• Radial nerve

• Axillary nerve

• Long thoracic nerve

• Median nerve

What is one of the primary functions of the serratus anterior muscle?

• Flexion of the elbow

• Rotation of the hip

• Stabilization of the scapula

• Extension of the knee

How does the inferior part of the serratus anterior muscle affect the shoulder joint?

• It rotates the shoulder joint medially

• It depresses the shoulder joint

• It extends the shoulder joint

• It shifts the shoulder joint superiorly