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COVID-19 can cause blink reflex abnormalities.
Coskun, Yunus; Fidanci, Halit; Öztürk, Ilker; Arlier, Zülfikar.
  • Coskun Y; Department of Internal Medicine, Adana City Training and Research Hospital, University of Health Sciences, Adana, Turkey.
  • Fidanci H; Department of Neurology, Division of Clinical Neurophysiology, Adana City Training and Research Hospital, University of Health Sciences, Adana, Turkey.
  • Öztürk I; Department of Neurology, Adana City Training and Research Hospital, University of Health Sciences, Adana, Turkey.
  • Arlier Z; Department of Neurology, Adana City Training and Research Hospital, University of Health Sciences, Adana, Turkey.
Ideggyogy Sz ; 75(5-06): 199-205, 2022 May 30.
Article in English | MEDLINE | ID: covidwho-1918218
ABSTRACT
Background and

purpose:

Neurological symptoms and complications associated with coronavirus 2019 (COVID-19) are well known. It was aimed to evaluate the brainstem and trigeminal/facial nerves and the pathways between these structures in COVID-19 using the blink reflex test.

Methods:

Thirty patients with post COVID-19 (16 males, 14 females) and 30 healthy individuals (17 males, 13 females) were included in this prospective study. Individuals who previously had a positive nose swap polymerase chain reaction test for severe acute respiratory syndrome coronavirus 2 and whose previously clinical features were compatible with COVID-19 were included in the post COVID-19 patient group. Neurological examination of the participants should be normal. Blink reflex test was performed on all participants. R1, ipsilateral R2 (IR2), and contralateral R2 (CR2) waves obtained from the test were analyzed.

Results:

The mean ages of healthy individuals and post COVID-19 patients were 34.0±6.4 and 38.4±10.6 years, respectively. Both age and gender were matched between the groups. R1, IR2, and CR2 latencies/amplitudes were not different between the two groups. The side-to-side R1 latency difference was 0.5±0.3 and 1.0±0.8 ms in healthy individuals and post COVID-19 patients, respectively (p=0.011). One healthy individual and 12 patients with post COVID-19 had at least one abnormal blink reflex parameter (p=0.001).

Conclusion:

This study showed that COVID-19 may cause subclinical abnormalities in the blink reflex, which includes the trigeminal nerve, the seventh nerve, the brainstem, and pathways between these structures.
Subject(s)
Keywords

Full text: Available Collection: International databases Database: MEDLINE Main subject: Blinking / COVID-19 Type of study: Cohort study / Experimental Studies / Observational study / Prognostic study / Randomized controlled trials Topics: Long Covid Limits: Adult / Female / Humans / Male Language: English Journal: Ideggyogy Sz Year: 2022 Document Type: Article Affiliation country: ISZ.75.0199

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Blinking / COVID-19 Type of study: Cohort study / Experimental Studies / Observational study / Prognostic study / Randomized controlled trials Topics: Long Covid Limits: Adult / Female / Humans / Male Language: English Journal: Ideggyogy Sz Year: 2022 Document Type: Article Affiliation country: ISZ.75.0199