Neurovasculature of dorsal trunk and neck

This tutorial covers the anatomy and function of intercostal muscles, including their origin, insertion, and role in breathing. It explains the external, internal, and innermost intercostal muscles, their anatomical positions, and how they contribute to inspiration and expiration. The video also discusses the intercostal tunnel, which houses arteries, veins, and nerves. Finally, it offers additional resources for further learning.

Which of the following describes the course of the external intercostal muscles?

• From the lower border of a rib ventro caudally to the upper border of the rib below

• From the sternum to the spine

• From the costal grooves inwards

• From the upper border of a rib to the lower border of the rib above

What is the primary function of the intercostal tunnel?

• To support the rib cage

• To provide passage for intercostal arteries, veins, and nerves

• To connect the ribs to the sternum

• To separate the internal and innermost intercostal muscles

What is the role of the external intercostal muscles during breathing?

• They contract the diaphragm

• They lower the ribs during expiration

• They elevate the ribs during inspiration

• They stabilize the rib cage

Which muscles are responsible for lowering the ribs during expiration?

• Internal and innermost intercostal muscles

• Diaphragm

• External intercostal muscles

• Abdominal muscles

What is the main task of the intercostal muscles during deep inspiration?

• To relax the diaphragm

• To tense the intercostal spaces

• To compress the lungs

• To expand the chest cavity