Brainstem auditory evoked potentials and blink reflexes in patients with pontocerebellar angle tumors

Nurlu, Gülay; Bavbek, Murad; Çolak, Ahmėt; Sarjbaş, Okay; Özgen, Tunçalp

doi:10.1007/bf00306812

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…e combination of abnormal ipsilateral and contralateral R1 and R2 responses suggested nerve dysfunction at the REZ of the trigeminal nerve in four of five cases, and in the main sensory nucleus of the trigeminal nerve in the pons in five cases. [11] Cenzato et al reported a case of TN caused by an intra-axial cavernous hemangioma along the primary sensory nucleus of the pons. Preoperative BR showed the disappearance of R1 wave latency and normalization of the wave postoperatively, with recovery from TN.…”

Section: Discussionmentioning

confidence: 99%

Delayed blink R1 latency in a patient with trigeminal neuralgia due to a contralateral vestibular schwannoma: An illustrative case

Oshida

Saura

Akamatsu

et al. 2023

Surgical Neurology International

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Background: Although the blink reflex (BR) is effective in objectively evaluating trigeminal neuropathy, few studies have demonstrated its effect on trigeminal neuralgia (TN). The authors report a patient with TN due to contralateral vestibular schwannoma (VS) functionally diagnosed by delayed R1 latency of the BR. Case Description: A 36-year-old man presented with left-sided deafness and paroxysmal facial pain in the right V1-3 area. Magnetic resonance imaging (MRI) showed a solid cystic mass compressing the right pons and left brainstem at the left cerebellopontine angle. Although preoperative BR evoked by right supraorbital nerve stimulation-induced delayed ipsilateral R1 latency and normal ipsilateral and contralateral R2 responses, the BR latency evoked by left supraorbital nerve stimulation was normal, indicating deficits in the principal nucleus of the trigeminal nerve in the right pons. The symptoms of TN disappeared after the removal of the VS. Postoperative MRI showed subtotal removal of the tumor and sufficient decompression of the pons and cerebellopontine cistern. The R1 latency returned to normal 50 days after surgery. Conclusion: The perioperative BR test was not only useful for objective evaluation of the localization of trigeminal neuropathy but also correlated with the symptoms of TN.

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Section: Discussionmentioning

confidence: 99%

Delayed blink R1 latency in a patient with trigeminal neuralgia due to a contralateral vestibular schwannoma: An illustrative case

Oshida

Saura

Akamatsu

et al. 2023

Surgical Neurology International

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“…Some authors have failed to demonstrate a prognostic value of preoperative electrophysiologic assessment of facial nerve, using either needle electromyography (EMG) 3,4 or electroneurography. 5 Blink reflex was first used more for diagnosis of CPA tumors than for evaluation of the nerve function, [6][7][8][9] using a small series of heterogeneously managed patients. 10 It is important to appreciate that in the context of facial nerve electrophysiologic examination, the blink reflex is the only technique that is in use to evaluate the intracranial portion of the facial nerve.…”

Section: Study Design Setting and Patientsmentioning

confidence: 99%

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confidence: 99%

Prognostic Value of the Blink Reflex in Acoustic Neuroma Surgery

Darrouzet

Hilton

Pinder

et al. 2002

Otolaryngol.--head neck surg.

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Multimodality electroneurophysiological findings in intra-axial and extra-axial lesions of the brain stem

Klug

Székely³

et al. 1995

Acta neurochir

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In 330 patients with a space occupying lesion of the posterior cranial fossa, the blink (BR) and masseter (MR) reflexes and brain stem auditory (BAEP) and somatosensory evoked potentials (SEP) were registered. The aim of our study was to look for electrophysiological criteria of differentiating between lesions within or outside the brain stem. The ipsilateral loss of BAEP in cerebellopontine angle tumours and the altered SEP in tumours within the brain stem turned out as frequent, almost specific findings. Prolonged ipsi-and contralateral late BR responses and prolonged MR responses, a long somatosensory central conduction time of the SEP and a prolonged wave III latency as well as a prolonged interpeak latency of the BAEP are not indicative but highly suspicious for a lesion within the brain stem. Prolonged early responses of the BR together with prolonged interpeak latencies of the BAEP are characteristic findings in cerebello-pontine angle tumours.

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Brainstem auditory evoked potentials and blink reflexes in patients with pontocerebellar angle tumors

Cited by 4 publications

References 12 publications

Delayed blink R1 latency in a patient with trigeminal neuralgia due to a contralateral vestibular schwannoma: An illustrative case

Delayed blink R1 latency in a patient with trigeminal neuralgia due to a contralateral vestibular schwannoma: An illustrative case

Prognostic Value of the Blink Reflex in Acoustic Neuroma Surgery

Multimodality electroneurophysiological findings in intra-axial and extra-axial lesions of the brain stem

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