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Questions and Answers
Which cranial nerve is responsible for sense of smell?
Which cranial nerve is responsible for sense of smell?
- CN II
- CN I (correct)
- CN III
- CN IV
Which cranial nerve is involved in vision?
Which cranial nerve is involved in vision?
- CN V
- CN I
- CN II (correct)
- CN III
What is the primary function of CN III?
What is the primary function of CN III?
Controls eye movement, pupil constriction, and eyelid movement
What is the primary function of CN IV?
What is the primary function of CN IV?
Which cranial nerve is both sensory and motor, providing cutaneous sensations from the face and mouth?
Which cranial nerve is both sensory and motor, providing cutaneous sensations from the face and mouth?
What is the primary function of CN VI?
What is the primary function of CN VI?
Which cranial nerve is associated with taste and facial expressions?
Which cranial nerve is associated with taste and facial expressions?
What functions are associated with CN VIII?
What functions are associated with CN VIII?
What is the primary function of CN IX?
What is the primary function of CN IX?
What does CN X control?
What does CN X control?
What is the primary function of CN XI?
What is the primary function of CN XI?
What is the function of CN XII?
What is the function of CN XII?
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Study Notes
Cranial Nerves Overview
- There are 12 pairs of cranial nerves, each with specific functions related to sensation and motor control.
CN I: Olfactory Nerve
- Functions: Sensory
- Role: Responsible for the sense of smell.
CN II: Optic Nerve
- Functions: Sensory
- Role: Essential for vision.
CN III: Oculomotor Nerve
- Functions: Motor
- Role: Controls eye movements, pupil constriction, and eyelid elevation.
CN IV: Trochlear Nerve
- Functions: Motor
- Role: Responsible for the movement of the eyeball.
CN V: Trigeminal Nerve
- Functions: Both sensory and motor
- Sensory Role: Provides cutaneous sensations from the face and mouth.
- Motor Role: Involved in opening the jaw and chewing, specifically from the maxillary and mandibular regions.
CN VI: Abducens Nerve
- Functions: Motor
- Role: Controls lateral eye movement.
CN VII: Facial Nerve
- Functions: Both sensory and motor
- Sensory Role: Involved in taste sensation.
- Motor Role: Responsible for facial expressions, as well as saliva and tear production.
CN VIII: Vestibulocochlear Nerve
- Functions: Sensory
- Role: Responsible for hearing and maintaining equilibrium (balance).
CN IX: Glossopharyngeal Nerve
- Functions: Both sensory and motor
- Sensory Role: Involved in taste.
- Motor Role: Facilitates swallowing and speech, as well as saliva production.
CN X: Vagus Nerve
- Functions: Both sensory and motor
- Sensory Role: Provides general sensations from the pharynx and epiglottis.
- Motor Role: Aids in swallowing, coughing, speech, and functioning of gastrointestinal tracts.
CN XI: Accessory Nerve
- Functions: Motor
- Role: Responsible for movement of the head and swallowing.
CN XII: Hypoglossal Nerve
- Functions: Motor
- Role: Involved in swallowing and articulation of speech.
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