Static cervico-ocular reflex in healthy humans.
Cervico-ocular reflex
ocular counterroll
vestibular dysfunction
vestibulo-ocular reflex
video oculography
Journal
Acta oto-laryngologica
ISSN: 1651-2251
Titre abrégé: Acta Otolaryngol
Pays: England
ID NLM: 0370354
Informations de publication
Date de publication:
May 2023
May 2023
Historique:
medline:
29
5
2023
pubmed:
21
4
2023
entrez:
21
04
2023
Statut:
ppublish
Résumé
Dynamic cervico- (COR) and vestibulo-ocular reflex (VOR) contribute to stabilise visual images in the retina. The gain in dynamic COR is small in healthy individuals but increases in patients with vestibular dysfunction. Conversely, static COR has not been directly observed in healthy individuals. To elucidate the presence of static COR and quantify it in normal individuals in the roll plane. Eleven healthy participants were included in the study. Eye torsions were measured using video oculography to evaluate the static COR induced by lateral neck flexion during a head-upright-with-body-tilt position at 15°, 30°, and 45°. The ocular counterroll (OCR) was compared during whole-body and head tilts to assess the influence of static COR on OCR. Static COR was significantly observed as eye torsion in the direction opposite to the body tilt. The head tilt OCR was significantly smaller than the whole-body tilt OCR to the right side but not to the left side. Static COR exists in healthy individuals and tends to show higher amplitude as neck flexion stimulation increases.
Sections du résumé
BACKGROUND
UNASSIGNED
Dynamic cervico- (COR) and vestibulo-ocular reflex (VOR) contribute to stabilise visual images in the retina. The gain in dynamic COR is small in healthy individuals but increases in patients with vestibular dysfunction. Conversely, static COR has not been directly observed in healthy individuals.
OBJECTIVES
UNASSIGNED
To elucidate the presence of static COR and quantify it in normal individuals in the roll plane.
METHODS
UNASSIGNED
Eleven healthy participants were included in the study. Eye torsions were measured using video oculography to evaluate the static COR induced by lateral neck flexion during a head-upright-with-body-tilt position at 15°, 30°, and 45°. The ocular counterroll (OCR) was compared during whole-body and head tilts to assess the influence of static COR on OCR.
RESULTS
UNASSIGNED
Static COR was significantly observed as eye torsion in the direction opposite to the body tilt. The head tilt OCR was significantly smaller than the whole-body tilt OCR to the right side but not to the left side.
CONCLUSION
UNASSIGNED
Static COR exists in healthy individuals and tends to show higher amplitude as neck flexion stimulation increases.
Identifiants
pubmed: 37083024
doi: 10.1080/00016489.2023.2201275
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM