Podcast
Questions and Answers
What is the main function of the ear?
What is the main function of the ear?
- To facilitate hearing and equilibrium (correct)
- To provide sensory input for taste
- To maintain hydration in the body
- To regulate body temperature
Which part of the ear is visible on the surface and composed of elastic cartilage?
Which part of the ear is visible on the surface and composed of elastic cartilage?
- Middle Ear
- External Acoustic Meatus
- Auricle/Pinna (correct)
- Internal Ear
Which nerves supply the upper and lower parts of the lateral surface of the External Acoustic Meatus?
Which nerves supply the upper and lower parts of the lateral surface of the External Acoustic Meatus?
- Auriculotemporal nerve and facial nerve
- Auriculotemporal nerve and Great auricular nerve (correct)
- Great auricular nerve and lesser occipital nerve
- Lesser occipital nerve and occulomotor nerve
What structures provide the blood supply to the External Acoustic Meatus?
What structures provide the blood supply to the External Acoustic Meatus?
What is the lowest part of the Auricle, which is covered by skin and composed of fibrofatty tissue?
What is the lowest part of the Auricle, which is covered by skin and composed of fibrofatty tissue?
What structure is a large depression that leads into the External Acoustic Meatus?
What structure is a large depression that leads into the External Acoustic Meatus?
Which nerve exclusively supplies the lower 1/3 of the lateral surface of the External Acoustic Meatus?
Which nerve exclusively supplies the lower 1/3 of the lateral surface of the External Acoustic Meatus?
What is the primary type of tissue that makes up the Auricle/Pinna?
What is the primary type of tissue that makes up the Auricle/Pinna?
Which anatomical feature of the External Ear is classified as being vestigial in humans?
Which anatomical feature of the External Ear is classified as being vestigial in humans?
What supplies blood to the External Acoustic Meatus?
What supplies blood to the External Acoustic Meatus?
What part of the External Ear is primarily responsible for maintaining equilibrium of the body?
What part of the External Ear is primarily responsible for maintaining equilibrium of the body?
Which of the following components is not a part of the Auricle?
Which of the following components is not a part of the Auricle?
Flashcards
External Ear Structure
External Ear Structure
The outer part of the ear, responsible for collecting sound waves.
External Acoustic Meatus (EAM)
External Acoustic Meatus (EAM)
The tube connecting the outer ear to the middle ear.
Auricle/Pinna function
Auricle/Pinna function
The visible part of the outer ear that collects sound waves.
EAM nerve supply
EAM nerve supply
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Auricle/Pinna structure
Auricle/Pinna structure
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Ear Function
Ear Function
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Ear Sections
Ear Sections
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Auricle: What is it?
Auricle: What is it?
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Auricle: Parts
Auricle: Parts
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EAM: What is it?
EAM: What is it?
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Auricle: Muscles
Auricle: Muscles
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Study Notes
Ear Structure and Function
- Ear is an organ of hearing and maintaining body equilibrium
- It is located within the temporal bone
- Composed of three parts: external, middle, and internal ear
External Ear (Auricle/Pinna)
- Visible on the surface
- Composed of a single, folded plate of elastic cartilage
- Covered by skin
- Lowest part (lobule) is soft and fatty
- Remainder of the auricle includes: helix, antihelix, concha, tragus, and scaphoid fossa
- The concha leads into external acoustic meatus (EAM)
Nerve Supply
- Lateral Surface:
- Upper 2/3: Auriculotemporal nerve
- Lower 1/3: Great auricular nerve
- Medial Surface:
- Upper 2/3: Lesser occipital nerve
- Lower 1/3: Great auricular nerve
- Root: Auricular branch of the vagus nerve
Blood Supply
- Derived from superficial temporal arteries
- Lymphatics drain into periauricular and postauricular lymph nodes
Muscles
- Muscles are vestigial in humans
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