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Questions and Answers
Which cranial nerve is responsible for the sense of smell?
Which cranial nerve is responsible for the sense of smell?
- Optic Nerve
- Olfactory Nerve (correct)
- Facial Nerve
- Trigeminal Nerve
The optic nerve (CN II) transmits visual information from the retina of the eye through the jugular foramen.
The optic nerve (CN II) transmits visual information from the retina of the eye through the jugular foramen.
False (B)
Which cranial nerve controls the superior oblique muscle of the eye?
Which cranial nerve controls the superior oblique muscle of the eye?
- Optic Nerve (CN II)
- Abducens Nerve (CN VI)
- Oculomotor Nerve (CN III)
- Trochlear Nerve (CN IV) (correct)
The trigeminal nerve (CN V) has three branches: ophthalmic (V1), maxillary (V2), and ______ (V3).
The trigeminal nerve (CN V) has three branches: ophthalmic (V1), maxillary (V2), and ______ (V3).
Match each cranial nerve with its corresponding foramen:
Match each cranial nerve with its corresponding foramen:
Which cranial nerve is responsible for innervating the lateral rectus muscle of the eye?
Which cranial nerve is responsible for innervating the lateral rectus muscle of the eye?
The facial nerve (CN VII) only carries motor signals for facial expression.
The facial nerve (CN VII) only carries motor signals for facial expression.
Through which skull pathway does the facial nerve (CN VII) travel?
Through which skull pathway does the facial nerve (CN VII) travel?
The ______ nerve (CN VIII) is responsible for the special senses of hearing and balance.
The ______ nerve (CN VIII) is responsible for the special senses of hearing and balance.
Which cranial nerve provides motor innervation to the parotid gland?
Which cranial nerve provides motor innervation to the parotid gland?
The glossopharyngeal nerve (CN IX) is responsible for the general sensation and taste from the anterior 2/3 of the tongue.
The glossopharyngeal nerve (CN IX) is responsible for the general sensation and taste from the anterior 2/3 of the tongue.
Which cranial nerve has motor function to the muscles of the pharynx and larynx, as well as the heart, bronchi, and digestive tract?
Which cranial nerve has motor function to the muscles of the pharynx and larynx, as well as the heart, bronchi, and digestive tract?
The accessory nerve (CN XI) provides somatic motor function to the ______ and sternocleidomastoid muscles.
The accessory nerve (CN XI) provides somatic motor function to the ______ and sternocleidomastoid muscles.
Which cranial nerve exits the skull through the hypoglossal foramen?
Which cranial nerve exits the skull through the hypoglossal foramen?
Match each cranial nerve with its pathway through the skull.
Match each cranial nerve with its pathway through the skull.
If a patient has difficulty moving their tongue, which cranial nerve might be affected?
If a patient has difficulty moving their tongue, which cranial nerve might be affected?
The trochlear nerve (CN IV) passes through the superior orbital fissure
The trochlear nerve (CN IV) passes through the superior orbital fissure
What function would be affected by damage to the olfactory nerve?
What function would be affected by damage to the olfactory nerve?
The ______ nerve is responsible for controlling the muscles of facial expression.
The ______ nerve is responsible for controlling the muscles of facial expression.
Which of the following cranial nerves carries both motor and sensory information?
Which of the following cranial nerves carries both motor and sensory information?
The superior oblique muscle moves the eye upward
The superior oblique muscle moves the eye upward
Which cranial nerve is most responsible for sensation from the cornea of the eye?
Which cranial nerve is most responsible for sensation from the cornea of the eye?
The abducens nerve innovates the ______ muscle.
The abducens nerve innovates the ______ muscle.
Which nerve provides innervation to the submandibular and sublingual salivary glands?
Which nerve provides innervation to the submandibular and sublingual salivary glands?
Match the following cranial nerves to their function:
Match the following cranial nerves to their function:
Which of the following responses require the use of motor function provided by the vagus nerve?
Which of the following responses require the use of motor function provided by the vagus nerve?
The accessory nerve (CN XI) only passes through jugular foramen.
The accessory nerve (CN XI) only passes through jugular foramen.
Which cranial nerve is responsible for motor control of the tongue?
Which cranial nerve is responsible for motor control of the tongue?
The Trigeminal nerve has 3 branches: Ophthalmic, ______, and Mandibular.
The Trigeminal nerve has 3 branches: Ophthalmic, ______, and Mandibular.
A patient presents with a diminished ability to hear. Which nerve is most likely affected?
A patient presents with a diminished ability to hear. Which nerve is most likely affected?
Flashcards
What is the Olfactory Nerve?
What is the Olfactory Nerve?
Cranial Nerve I; responsible for the sense of smell.
What is the Optic Never?
What is the Optic Never?
Cranial Nerve II; responsible for vision. It runs from the retina to the optic chiasm.
What is the Oculomotor Nerve?
What is the Oculomotor Nerve?
Cranial Nerve III; responsible for eye movement, pupil constriction, and eyelid movement.
What is the Trochlear Nerve?
What is the Trochlear Nerve?
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What is the Trigeminal Nerve?
What is the Trigeminal Nerve?
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What is the Abducens Nerve?
What is the Abducens Nerve?
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What is the Facial Nerve?
What is the Facial Nerve?
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What is the Vestibulocochlear Nerve?
What is the Vestibulocochlear Nerve?
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What is the Glossopharyngeal Nerve?
What is the Glossopharyngeal Nerve?
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What is the Vagus Nerve?
What is the Vagus Nerve?
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What is the Accessory Nerve?
What is the Accessory Nerve?
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What is the Hypoglossal Nerve?
What is the Hypoglossal Nerve?
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Where are the receptors for the sense of smell located?
Where are the receptors for the sense of smell located?
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What skull structure does the Olfactory nerve pass through?
What skull structure does the Olfactory nerve pass through?
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Where are the receptors for vision located?
Where are the receptors for vision located?
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What skull structure does the Optic Nerve pass through?
What skull structure does the Optic Nerve pass through?
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What skull structure do CN III, CN IV, V1, and CN VI pass through?
What skull structure do CN III, CN IV, V1, and CN VI pass through?
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What skull structure does V2 pass through?
What skull structure does V2 pass through?
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What skull structure does V3 pass through?
What skull structure does V3 pass through?
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What skull structure do CN VII and CN VIII pass through?
What skull structure do CN VII and CN VIII pass through?
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What skull structure do CN IX, CN X, and CN XI pass through?
What skull structure do CN IX, CN X, and CN XI pass through?
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What skull structure does CN XII pass through?
What skull structure does CN XII pass through?
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Which eye muscle does the trochlear nerve (CN IV) innervate?
Which eye muscle does the trochlear nerve (CN IV) innervate?
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Which eye muscle does the abducens nerve (CN VI) innervate?
Which eye muscle does the abducens nerve (CN VI) innervate?
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What does the Trigeminal nerve control?
What does the Trigeminal nerve control?
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What does the Facial nerve control?
What does the Facial nerve control?
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What does the Glossopharyngeal nerve control?
What does the Glossopharyngeal nerve control?
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What does the Vagus nerve control?
What does the Vagus nerve control?
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What does the Accessory nerve control?
What does the Accessory nerve control?
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What does the Hypoglossal nerve control?
What does the Hypoglossal nerve control?
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Study Notes
Cranial Nerves
- There are twelve cranial nerves, each with specific functions and pathways.
- The cranial nerves are: Olfactory (I), Optic (II), Oculomotor (III), Trochlear (IV), Trigeminal (V), Abducens (VI), Facial (VII), Vestibulocochlear (VIII), Glossopharyngeal (IX), Vagus (X), Accessory (XI), and Hypoglossal (XII).
- A mnemonic to remember the cranial nerves is: "Oh Oh Oh To Take A Family Vacation! Go Vegas And Hawaii!"
- Another mnemonic is: "Oh Once One Takes The Anatomy Final Very Good Very Awesome Hey Ho!"
Olfactory Nerve (CN I)
- Function: smell
- Receptor location: nasal cavity
- Pathway through the skull: cribriform plate of the ethmoid bone
Optic Nerve (CN II)
- Function: vision
- Receptor location: retina of eye
- Pathway through the skull: optic foramen
Oculomotor Nerve (CN III)
- Related to muscles of the eye, along with Optic Nerve.
Trochlear Nerve (CN IV)
- Related to muscles of the eye, along with Optic Nerve.
Abducens Nerve (CN VI)
- Related to muscles of the eye, along with Optic Nerve.
Movements of the Right Eye
- Lateral rectus moves eye laterally.
- Medial rectus moves eye medially.
- Superior rectus elevates eye.
- Inferior rectus depresses eye.
- Superior oblique depresses eye and laterally rotates eye.
- Inferior oblique elevates eye and laterally rotates eye.
Trigeminal Nerve (CN V)
- Function: sensation from skin of face (V1, V2, V3), sensation from cornea (V1), sensation from paranasal sinuses (V1 and V2), sensation from upper teeth (V2), sensation from lower teeth (V3), sensation from tongue (V3), and somatic motor to muscles of mastication (V3)
- Pathway through the skull: superior orbital fissure (V1), foramen rotundum (V2), foramen ovale (V3)
- It has three branches: Ophthalmic (V1), Maxillary (V2), and Mandibular (V3).
Facial Nerve (CN VII)
- Function: motor to muscles of facial expression, motor to lacrimal gland, motor to submandibular and sublingual salivary glands, and taste from the tongue.
- Pathway through the skull: internal auditory meatus
Vestibulocochlear Nerve (CN VIII)
- Function: special sense of hearing and balance
- Pathway through the skull: internal auditory meatus
Glossopharyngeal Nerve (CN IX)
- Function: motor to the parotid gland, general sensation (touch) and taste from the tongue.
- Pathway through the skull: jugular foramen
Taste from the Tongue
- The anterior 2/3 of the tongue's taste sensation is facilitated by the facial nerve (CN VII).
- The posterior 1/3 of the tongue's taste sensation is facilitated by the glossopharyngeal nerve (CN IX).
Vagus Nerve (CN X)
- Function: motor to muscles of pharynx and larynx, motor to heart, bronchi, and muscles of digestive tract, and sensation from the larynx and pharynx.
- Pathway through the skull: jugular foramen
Accessory Nerve (CN XI)
- Function: somatic motor to the trapezius and sternocleidomastoid muscles.
- Pathway through the skull: jugular foramen
- Originates from the upper cervical spinal cord.
- Enters the skull through the foramen magnum and exits through the jugular foramen.
Hypoglossal Nerve (CN XII)
- Function: somatic motor to muscles of the tongue
- Pathway through the skull: hypoglossal foramen
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