Different Visual Weighting due to Fast or Slow Vestibular Deafferentation: Before and after Schwannoma Surgery
Joint Authors
Tjernström, Fredrik
Fransson, Per-Anders
Kahlon, Babar
Karlberg, Mikael
Lindberg, Sven
Siesjö, Peter
Magnusson, Måns
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-02-18
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Background.
Feedback postural control depends upon information from somatosensation, vision, and the vestibular system that are weighted depending on their relative importance within the central nervous system.
Following loss of any sensory component, the weighting changes, e.g., when suffering a vestibular loss, the most common notion is that patients become more dependent on visual cues for maintaining postural control.
Dizziness and disequilibrium are common after surgery in schwannoma patients, which could be due to interpretation of the remaining sensory systems involved in feedback-dependent postural control and spatial orientation.
Objective.
To compare visual dependency in spatial orientation and postural control in patients suffering from unilateral vestibular loss within different time frames.
Methods.
Patients scheduled for schwannoma surgery: group 1 (n=27) with no vestibular function prior to surgery (lost through years), group 2 (n=12) with remaining vestibular function at the time of surgery (fast deafferentation), and group 3 (n=18) with remaining function that was lost through gentamicin installations in the middle ear (slow deafferentation).
All patients performed vibratory posturography and rod and frame investigation before surgery and 6 months after surgery.
Results.
Postural control improved after surgery in patients that suffered a slow deafferentation (groups 1 and 3) (p<0.001).
Patients that suffered fast loss of remaining vestibular function (group 2) became less visual field dependent after surgery (p≤0.035) and were less able to maintain stability compared with group 1 (p=0.010) and group 3 (p=0.010).
Conclusions.
The nature and time course of vestibular deafferentation influence the weighting of remaining sensory systems in order to maintain postural control and spatial orientation.
American Psychological Association (APA)
Tjernström, Fredrik& Fransson, Per-Anders& Kahlon, Babar& Karlberg, Mikael& Lindberg, Sven& Siesjö, Peter…[et al.]. 2019. Different Visual Weighting due to Fast or Slow Vestibular Deafferentation: Before and after Schwannoma Surgery. Neural Plasticity،Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1201445
Modern Language Association (MLA)
Tjernström, Fredrik…[et al.]. Different Visual Weighting due to Fast or Slow Vestibular Deafferentation: Before and after Schwannoma Surgery. Neural Plasticity No. 2019 (2019), pp.1-11.
https://search.emarefa.net/detail/BIM-1201445
American Medical Association (AMA)
Tjernström, Fredrik& Fransson, Per-Anders& Kahlon, Babar& Karlberg, Mikael& Lindberg, Sven& Siesjö, Peter…[et al.]. Different Visual Weighting due to Fast or Slow Vestibular Deafferentation: Before and after Schwannoma Surgery. Neural Plasticity. 2019. Vol. 2019, no. 2019, pp.1-11.
https://search.emarefa.net/detail/BIM-1201445
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1201445