A 44-year-old man presents with facial asymmetry. On physical examination; touching the cornea of either eye with a cotton swab results in blinking of only the left eye. The patient states that he feels the cotton swab touch in both eyes. Which of the following is the most likely diagnosis?
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الإجابة: C. Right facial nerve palsy
The corneal reflex has an afferent limb in the trigeminal (V1) nerve and an efferent limb in the facial nerve (orbicularis oculi), with bilateral central connections. The patient feels the touch in both eyes, so both trigeminal nerves work; touching either eye makes only the left eye blink, so the right facial nerve (efferent) is not working. Facial asymmetry fits.
- A trigeminal palsy would abolish sensation and the blink of both eyes when that side is touched.
- المصدر
- Basics of Neurology-Ali Rawas.pdf · p. 25
- المحاضرة
- Weakness: TIA & Stroke · Neurology · Module C
- ظهر في
- Neuro bank