Cervico-ocular reflex upregulation in dizzy patients with asymmetric neck pathology.
| Autor: | Zamysłowska-Szmytke E; Nofer Institute of Occupational Medicine, Łódź, Poland (Audiology and Phoniatrics Clinic, Balance Disorders Unit)., Adamczewski T; Medical University of Lodz, Łódź, Poland (Clinic of Medical Rehabilitation)., Ziąber J; Holy Family Medical Hospital, Łódź, Poland., Majak J; Medical center 'Medicover', Łódź, Poland., Kujawa J; Medical University of Lodz, Łódź, Poland (Clinic of Medical Rehabilitation)., Śliwińska-Kowalska M; Nofer Institute of Occupational Medicine, Łódź, Poland (Audiology and Phoniatrics Clinic). |
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| Jazyk: | angličtina |
| Zdroj: | International journal of occupational medicine and environmental health [Int J Occup Med Environ Health] 2019 Oct 16; Vol. 32 (5), pp. 723-733. Date of Electronic Publication: 2019 Oct 07. |
| DOI: | 10.13075/ijomeh.1896.01428 |
| Abstrakt: | Objectives: The aim of this study was to investigate whether the restriction in neck rotation and increased neck muscle tension could be causally related to vertigo and dizziness. Material and Methods: Seventy-one patients reporting vertigo and/or imbalance were divided into 2 groups: 45 subjects with unilateral restriction (R+) and 26 without restriction (R-) of cervical rotation and muscle tension in the clinical flexion-rotation test. The normal caloric test was the inclusion criterion. The control group comprised 36 healthy volunteers with no history of vertigo. The vestibulo-ocular reflex (VOR) and the cervico-occular reflex (COR) were measured through the videonystagmography (VNG) sinusoidal pendular kinetic test in the conditions of not inactivated head and immobilized head, respectively. The VNG-head torsion test (VNG-HTT) nystagmus was recorded. Results: Among the reported complaints, neck stiffness, headaches and blurred vision were more frequent in the R+ group than in both the R- group and the control group. VNG revealed an increased COR gain and the presence of VNG-HTT nystagmus in the R+ group only. Similarly, only in the R+ group a positive relationship between COR and VOR was observed. Conclusions: Patients with asymmetric restriction in neck rotation and increased neck muscle tension reveal the tendency to have an increased response of the vestibular system, along with co-existing COR upregulation. Further research is needed to investigate the relationships between the activation of cervical mechanoreceptors and dizziness pathomechanisms. Int J Occup Med Environ Health. 2019;32(5):723-33. (This work is available in Open Access model and licensed under a CC BY-NC 3.0 PL license.) |
| Databáze: | MEDLINE |
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