2024 CNIM Cranial Nerves Latest Questions With Complete Grade A Answers
- An agent that should be avoided immediately before EMG facial nerve monitoring is...
Answer: Vecuronium - because it is a muscle relaxant.
- Branches of the Facial Nerve
Answer:
Temporal Zygomatic Buccal Mandibular Cervical
- Trigeminal nerve stim will elicit a CMAP from...
Answer: Temporalis - one of the muscles of mastication
CN V
Includes the ophthalmic nerve, the maxillary nerve, and the mandibular nerve.
- The X CN can be monitored with electrodes inserted in the...
Answer: Vocalis muscle
- The XXI nerve can be monitored with electrodes inserted into the...
Answer: Trapezius muscle
- Random spike discharges can be heard from a speaker during facial nerve dissection in...
Answer: During electrocautery
- The facial nerve EMG response to intracranial stim has a latency of approximately:
Answer: 7 msec
- During facial nerve EMG monitoring, what should not be introduced to the operative site:
Answer: Xylocaine (lidocaine)
Because it is a nerve blocker 1 / 2
- Visual observation of facial muscles during facial nerve electrical stim may be misleading
because...
Answer: Movement can be from the trigeminal nerve rather than the facial nerve.
10. The recommended filter setting for the facial nerve CMAP are:
Answer: 1-1.5 kHz
- What muscle would you monitor for EMG activity for cranial nerve XII?
Answer: -Tongue
- What bandpass filter should be used to record CMAPs for facial nerve?
Answer: 10 to 1500 Hz
- What would you monitor for a MVD of the Vth nerve?
Answer: Masseter
- Facial nerve EMG responses are best recorded from...
Answer: Orbicularis oris and orbicularis oculi
- Early changes to CMAPs, during the exposure of CN VII, are most likely due to...
Answer: Heating from the electrical cautery device.
- Preservation of facial nerve CMAPs...
Answer: Does not always indicate a good surgical outcome.
- In a posterior fossa craniotomy surgery for a large tumor with unilateral hearing loss, the
appropriate modalities to monitor would be:
Answer: Contralateral BAEP, median nerve SSEP, and facial nerve.
- What should me monitored during a vestibular neurectomy?
Answer: Ipsilateral BAEP and facial nerve.
- MVD involves...
Answer: Lifting an artery off a nerve
- At the end of an acoustic neuroma surgery, you would test the facial nerve by stimulating...
Answer: Proximal to the site of the tumor.
- It is most appropriate to monitor the median nerve, not the tibial nerve, for:
Answer: Middle cerebral artery aneurysm
- Vascular malformations of the posterior fossa associated with hemifacial spasm and facial
- / 2
peresis may cause...