Eustachian Tube Anatomy and Function

The video tutorial provides an in-depth look at the Ustan tube, also known as the auditory or fingo tanic tube. It connects the naso fings to the tanic cavity and is composed of fibrocartilagenous and bony parts. The video explains the tube's structure, function, and its role in protecting the middle ear from nasal secretions. It covers the tube's openings, associated muscles, mucosa, and nerve supply. Additionally, it highlights the differences between the Ustan tube in infants and adults, focusing on size, angle, and function.

What is another name for the Eustachian tube?

• Auditory tube

• Nasal tube

• Pharyngeal tube

• Middle ear tube

What is the role of the elastin hinge in the Eustachian tube?

• To support the tube's structure

• To connect the tube to the middle ear

• To keep the tube closed

• To open the tube

What is the function of Osman's pad of fat in the Eustachian tube?

• To connect the tube to the nasopharynx

• To support the tube's structure

• To close the tube

• To open the tube

Where is the tympanic opening of the Eustachian tube located?

• In the nasopharynx

• In the middle ear

• In the nasal cavity

• In the throat

What is the significance of the fossa of Rosenmüller?

• It is a common site for malignancy

• It is a site for muscle attachment

• It helps in tube closure

• It connects to the middle ear

Which muscle is responsible for opening the Eustachian tube by contraction?

• Osman's pad of fat

• Tensor veli palatini

• Levator veli palatini

• Salpingopharyngeus

Which nerve supplies the levator veli palatini muscle?

• Trigeminal nerve

• Vagus nerve

• Hypoglossal nerve

• Facial nerve

How does the Eustachian tube in infants differ from that in adults?

• It is longer and more vertical

• It is the same as in adults

• It is narrower and more curved

• It is wider, shorter, and more horizontal

What is the average length of the Eustachian tube in adults?

• 13 to 18 mm

• 24 to 30 mm

• 31 to 38 mm

• 40 to 45 mm

At what age does the Eustachian tube typically reach adult morphology?

• 5 to 7 years

• 7 to 10 years

• 3 to 5 years

• 10 to 12 years