Podcast
Questions and Answers
Which nerve is responsible for general sensation in the anterior two-thirds of the tongue?
Which nerve is responsible for general sensation in the anterior two-thirds of the tongue?
What type of sensation does the glossopharyngeal nerve transmit in the posterior one-third of the tongue?
What type of sensation does the glossopharyngeal nerve transmit in the posterior one-third of the tongue?
Which nerve controls the movement of the tongue during speech and swallowing?
Which nerve controls the movement of the tongue during speech and swallowing?
Which is NOT an intrinsic muscle of the tongue?
Which is NOT an intrinsic muscle of the tongue?
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What is the function of the styloglossus muscle?
What is the function of the styloglossus muscle?
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Which of the following nerves is responsible for special sensation (taste) in the anterior two-thirds of the tongue?
Which of the following nerves is responsible for special sensation (taste) in the anterior two-thirds of the tongue?
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How does the vagus nerve contribute to the motor function of the tongue?
How does the vagus nerve contribute to the motor function of the tongue?
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What is the main function of the genioglossus muscle?
What is the main function of the genioglossus muscle?
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Study Notes
General Sensation of the Tongue
- Anterior two-thirds: The mandibular nerve (specifically, via the lingual nerve) is responsible for general sensation.
- Posterior one-third: The glossopharyngeal nerve transmits general sensation.
Special Sensation (Taste) of the Tongue
- Anterior two-thirds: The facial nerve (via the chorda tympani) carries taste information.
- Posterior one-third: The glossopharyngeal nerve transmits both taste and general sensation.
Motor Function of the Tongue
- The hypoglossal nerve (XII) controls tongue movement.
Intrinsic Muscles of the Tongue
- Genioglossus
- Hyoglossus
- Styloglossus
- Palatoglossus
- Innervated by the vagus nerve (X).
Lingual Nerve Function
- Carries general sensation from the anterior two-thirds of the tongue.
Chorda Tympani Nerve Function
- Carries taste information from the anterior two-thirds of the tongue.
Glossopharyngeal Nerve Function
- Involved in both sensory (general and special) functions in the posterior one-third of the tongue.
Tongue Movement during Speech and Swallowing
- Controlled by the hypoglossal nerve (XII).
Intrinsic Tongue Muscle Functions
- Responsible for controlling the shape and movement of the tongue.
Palatoglossus Muscle Innervation
- Innervated by the vagus nerve (X).
Genioglossus Muscle Function
- Responsible for protrusion and depression of the tongue.
Hyoglossus Muscle Innervation
- Innervated by the hypoglossal nerve (XII).
Styloglossus Muscle Function
- Responsible for retracting and elevating the sides of the tongue.
Vagus Nerve and Tongue Motor Function
- Contributes to tongue motor function by innervating the palatoglossus muscle.
Hypoglossal Nerve Role in Tongue Movement
- Controls voluntary movements of the tongue.
Facial Nerve and Taste Sensation
- Carries taste sensation via the chorda tympani to the anterior two-thirds of the tongue.
Glossopharyngeal Nerve and Posterior Tongue Sensation
- Carries both general and special (taste) sensation to the posterior one-third of the tongue.
Hyoglossus Muscle Function
- Responsible for depressing and retracting the sides of the tongue.
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Description
This quiz focuses on the anatomy and nerve functions associated with the tongue, including sensations and motor control. Participants will explore the roles of different nerves in taste and general sensation for various regions of the tongue. Test your knowledge on the intrinsic muscles and their innervation as well.
