Cranial Nerves Flashcards
CN I
Olfactory
CN II
Optic
CN III
Occulomotor
CN IV
Trochlear
CN V
Trigeminal
CN VI
Abducens
CN VII
Facial
CN VIII
Vestibulocochlear
CN IX
Glossopharyngeal
CN X
Vagus
CN XI
Spinal accessory
CN XII
Hypoglossal
How do you test cranial nerve II (optic)
Light reflex Accommodation reflex Visual acuity Fundoscopy Ichihara plates
Which muscles does cranial nerve III (occulomotor) innervate
Medial, superior and inferior rectus
Inferior oblique
Levator palpebrae superioris
Constrictor pupillae
Which muscle does cranial nerve IV (trochlear) innervate
Superior oblique
Which muscle does cranial nerve VI (abducens) innervate
Lateral rectus
How do you test cranial nerve V (trigeminal)
Sensation - ophthalmic, maxillary, mandibular
Muscles of mastication
Ask about sensitivity to sounds
How do you test cranial nerve VII (facial)
Facial expression - raise eyebrows, frown, shut eyes, puff cheeks, purse lips, teeth smile
Ask about sensitivity to sounds
Ask about dry eyes and dry mouth
Ask about reduced taste
How do you test cranial nerve VIII (vestibulocochlear)
Whisper test Webers Rinnes Rombergs Gait
How do you test cranial nerve X (vagus)
Uvula movement
Assess whether air escapes the nose when blowing their cheeks out
Swallow water
How do you test cranial nerve IX (glossopharyngeal)
Ask about dry mouth
Ask about tast
Which nerve supplies taste to the posterior 1/3 of the tongue
Glossopharyngeal (CN IX)
Which nerve supplies taste to the anterior 2/3 of the tongue
Facial (CN VII)
How do you test cranial nerve XI (spinal accessory)
Turn head against resistance
Shrug shoulders against resistance
How do you test cranial nerve CN XII (hypoglossal)
Look at the tongue
Movements
Against cheek
Say yellow lorry
Damage to cranial nerve VI causes ?
Estropia at rest
Damage to cranial nerve IV causes ?
Can’t look down when looking nasally
Damage to cranial nerve III causes ?
Down + out eye
Ptosis
Mydriasis (pupil dilation)
