Podcast
Questions and Answers
Which cranial nerve is responsible for the sense of smell?
Which cranial nerve is responsible for the sense of smell?
- Facial Nerve (CN VII)
- Optic Nerve (CN II)
- Trigeminal Nerve (CN V)
- Olfactory Nerve (CN I) (correct)
The optic nerve (CN II) is responsible for hearing and balance.
The optic nerve (CN II) is responsible for hearing and balance.
False (B)
Which cranial nerve controls the lateral movement of the eye?
Which cranial nerve controls the lateral movement of the eye?
- Trigeminal Nerve (CN V)
- Oculomotor Nerve (CN III)
- Trochlear Nerve (CN IV)
- Abducens Nerve (CN VI) (correct)
Which cranial nerve is responsible for chewing?
Which cranial nerve is responsible for chewing?
The facial nerve (CN VII) is responsible for taste sensation in the anterior ______ of the tongue.
The facial nerve (CN VII) is responsible for taste sensation in the anterior ______ of the tongue.
Match the cranial nerve with its primary function:
Match the cranial nerve with its primary function:
Which of the following cranial nerves has both sensory and motor functions?
Which of the following cranial nerves has both sensory and motor functions?
The trochlear nerve (CN IV) controls pupillary constriction.
The trochlear nerve (CN IV) controls pupillary constriction.
Which cranial nerve is responsible for elevating the pharynx and larynx?
Which cranial nerve is responsible for elevating the pharynx and larynx?
What is the mnemonic for remembering the functions of the cranial nerves (sensory, motor, or both)?
What is the mnemonic for remembering the functions of the cranial nerves (sensory, motor, or both)?
Damage to the ______ nerve can result in difficulties with swallowing, hoarseness, and impaired gag reflex.
Damage to the ______ nerve can result in difficulties with swallowing, hoarseness, and impaired gag reflex.
Match the cranial nerve branch with its specific function:
Match the cranial nerve branch with its specific function:
Which cranial nerve provides parasympathetic innervation to the parotid gland for salivation?
Which cranial nerve provides parasympathetic innervation to the parotid gland for salivation?
The hypoglossal nerve (CN XII) controls all muscles of the tongue.
The hypoglossal nerve (CN XII) controls all muscles of the tongue.
Which cranial nerve is tested by asking the patient to shrug their shoulders against resistance?
Which cranial nerve is tested by asking the patient to shrug their shoulders against resistance?
The olfactory nerve (CN I) is commonly tested using visual acuity charts.
The olfactory nerve (CN I) is commonly tested using visual acuity charts.
Which cranial nerve is responsible for taste sensation from the posterior 1/3 of the tongue?
Which cranial nerve is responsible for taste sensation from the posterior 1/3 of the tongue?
Which cranial nerve is tested by assessing pupillary light reflex?
Which cranial nerve is tested by assessing pupillary light reflex?
The ______ nerve is assessed by testing the gag reflex.
The ______ nerve is assessed by testing the gag reflex.
Match the nerve with the eye movement it controls:
Match the nerve with the eye movement it controls:
Damage to which cranial nerve can lead to Bell's palsy?
Damage to which cranial nerve can lead to Bell's palsy?
The vestibulocochlear nerve (CN VIII) has only a vestibular component and no cochlear component.
The vestibulocochlear nerve (CN VIII) has only a vestibular component and no cochlear component.
Which cranial nerve is responsible for sensation from the middle ear?
Which cranial nerve is responsible for sensation from the middle ear?
What is the function of the Jacobson's nerve, a branch of the facial nerve?
What is the function of the Jacobson's nerve, a branch of the facial nerve?
The corneal reflex, which involves blinking in response to touching the cornea, is primarily mediated by the ______ nerve.
The corneal reflex, which involves blinking in response to touching the cornea, is primarily mediated by the ______ nerve.
Match each cranial nerve with its type:
Match each cranial nerve with its type:
Which cranial nerve is responsible for the efferent limb of the pupillary light reflex?
Which cranial nerve is responsible for the efferent limb of the pupillary light reflex?
The accessory nerve (CN XI) originates solely from the brainstem.
The accessory nerve (CN XI) originates solely from the brainstem.
Which of the following cranial nerves does NOT pass through the cavernous sinus?
Which of the following cranial nerves does NOT pass through the cavernous sinus?
Damage to which cranial nerve results in the tongue deviating towards the affected side when protruded?
Damage to which cranial nerve results in the tongue deviating towards the affected side when protruded?
The ______ nerve provides taste sensation from the epiglottis.
The ______ nerve provides taste sensation from the epiglottis.
Match the cranial nerve with the correct foramen it passes through:
Match the cranial nerve with the correct foramen it passes through:
Which cranial nerve is responsible for the afferent limb of the corneal reflex?
Which cranial nerve is responsible for the afferent limb of the corneal reflex?
The glossopharyngeal nerve (CN IX) is responsible for motor innervation of the muscles of facial expression.
The glossopharyngeal nerve (CN IX) is responsible for motor innervation of the muscles of facial expression.
Which cranial nerve provides sensory innervation to the carotid sinus and carotid body?
Which cranial nerve provides sensory innervation to the carotid sinus and carotid body?
Which cranial nerve is responsible for innervating the stapedius muscle in the middle ear?
Which cranial nerve is responsible for innervating the stapedius muscle in the middle ear?
The ______ nerve is responsible for the motor component of the gag reflex.
The ______ nerve is responsible for the motor component of the gag reflex.
Match the following cranial nerve lesions with their associated clinical sign:
Match the following cranial nerve lesions with their associated clinical sign:
Which structure does the trochlear nerve (CN IV) innervate?
Which structure does the trochlear nerve (CN IV) innervate?
Which cranial nerve passes through the superior orbital fissure canal?
Which cranial nerve passes through the superior orbital fissure canal?
Flashcards
CNI Olfactory
CNI Olfactory
Kranialnerve I, ansvarlig for luktesansen.
CNII Optic
CNII Optic
Kranialnerve II, ansvarlig for syn.
CNIII Oculomotor
CNIII Oculomotor
Kranialnerve III, kontrollerer de fleste øyemuskler og pupillreaksjon.
CNIV Trochlear
CNIV Trochlear
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CNV Trigeminal
CNV Trigeminal
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CNVI Abducens
CNVI Abducens
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CNVII Facial
CNVII Facial
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CNVIII Vestibulocochlear
CNVIII Vestibulocochlear
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CNIX Glossopharyngeal
CNIX Glossopharyngeal
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CNX Vagus
CNX Vagus
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CNXI Accessory
CNXI Accessory
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CNXII Hypoglossal
CNXII Hypoglossal
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CNI Funksjon
CNI Funksjon
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CNII Funksjon
CNII Funksjon
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CNIII Funksjon
CNIII Funksjon
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CNIV Funksjon
CNIV Funksjon
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CNV Funksjon
CNV Funksjon
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CNVI Funksjon
CNVI Funksjon
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CNVII Funksjon
CNVII Funksjon
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CNVIII Funksjon
CNVIII Funksjon
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CNIX Funksjon
CNIX Funksjon
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CNX Funksjon
CNX Funksjon
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CNXI Funksjon
CNXI Funksjon
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CNXII Funksjon
CNXII Funksjon
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Study Notes
- Cranial nerves are assessed for anatomy and function.
Functions
- S = sensory.
- M = motor.
- P = parasympathetic.
- S/M = sympathetic.
CN I: Olfactory Nerve
- Function: Smell (sensory).
- Carries sensory information related to smell.
- Assessment involves client identifying different mild aromas with eyes closed.
CN II: Optic Nerve
- Function: Sight (sensory).
- Assessment involves evaluating visual acuity and fields; reading newsprint and determining objects.
CN III: Oculomotor Nerve
- Function: Eyeball movement (MR, IR, SR, IO), movement of upper eyelid, pupillary constriction (motor), pupillary light reflex (parasympathetic).
- Serves muscles of the eye.
- Assessment: Assess ocular movements and reaction to light/accommodation.
CN IV: Trochlear Nerve
- Function: Eyeball movement (superior oblique) (motor).
- Assessment involves downward and inward eye movement, moving eyeballs obliquely.
CN V: Trigeminal Nerve
- Has three divisions: ophthalmic, maxillary, and mandibular.
- Ophthalmic and maxillary are sensory; mandibular also controls chewing.
- Sensory from face and mouth; motor to muscles of mastication (chewing).
- Assessment: Sensations of face, chewing movements, eliciting blink reflex by lightly touching lateral sclera.
CN VI: Abducens Nerve
- Function: Eyeball movement (lateral rectus) (motor).
- Serves the lateral rectus eye muscle.
- Assessment involves lateral eye movement, moving eyeballs laterally.
CN VII: Facial Nerve
- Function: Taste (anterior 2/3 of tongue) (sensory), facial expression (motor), eyelid closing (motor), stapedius muscle dampening sound (motor), salivation (submandibular and sublingual glands) (parasympathetic).
- Serves the muscles of facial expression, lacrimal glands, and salivary glands.
- Assessment: Taste on anterior 2/3 of the tongue, facial movements, eye closure, labial speech, do different facial expressions like smiling, frowning and raising of eyebrows; ask client to identify various tastes.
CN VIII: Vestibulocochlear Nerve
- Function: Hearing (cochlea) and balance (vestibular apparatus) (sensory).
- Assessment: Hearing and balance, assess client's ability to hear.
CN IX: Glossopharyngeal Nerve
- Function: Sensation from posterior 1/3 of tongue, tonsils, middle ear, pharynx (sensory), taste from posterior 1/3 of tongue (sensory), stylopharyngeus muscle - elevates pharynx/larynx (motor), salivation - parotid gland (parasympathetic).
- Serves the pharynx (throat) for swallowing, posterior third of tongue, parotid salivary gland.
- Assessment: Posterior taste of tongue, swallow and gag reflex, and swallowing and phonation muscles of the pharynx.
CN X: Vagus Nerve
- Function: Swallowing, elevation of palate, talking, coughing, gag reflex (motor), heart rate, GI peristalsis (parasympathetic), sweating, vasovagal syncope, peripheral chemoreceptors (sympathetic).
- Sensations from visceral (internal) organs, and parasympathetic motor regulation of visceral organs.
- Assessment: Swallowing sensation from pharynx, carotid sinus, clients speech for hoarseness.
CN XI: Accessory Nerve
- Function: Head turning (SCM), shoulder shrugging (trapezius) (motor).
- Serves muscles that move head, neck, and shoulders.
- Assessment: Sternocleidomastoid and trapezius muscle movement.
CN XII: Hypoglossal Nerve
- Function: Most muscles of tongue (except palatoglossus), tongue movement (motor).
- Serves muscles of the tongue.
- Assessment: Tongue movement for speech, sound articulation and swallowing.
Mnemonic for Cranial Nerves
- Some Say Marry Money But My Brother Says Big Brains Matter More (sensory, motor, or both).
Mnemonic for Cranial Nerve Function
- Oh Oh Oh To Touch And Feel Very Good Velvet Ah H.
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