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From ear to uncertainty: vestibular contributions to cognitive function.
1Department Pharmacology and Toxicology, School of Medical Sciences, and the Brain Health Research Centre, University of Otago Dunedin, New Zealand.
Frontiers in Integrative Neuroscience
|December 11, 2013
Summary
Vestibular loss significantly impairs cognitive functions, particularly spatial memory, in both animals and humans. This review explores the link between vestibular dysfunction and cognitive deficits, excluding other potential causes.
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Area of Science:
- Neuroscience
- Vestibular System Research
- Cognitive Science
Background:
- Vestibular dysfunction leads to motor reflex deficits.
- Emerging evidence links vestibular loss to cognitive impairments, including spatial memory issues.
- Ascending vestibular pathways to the limbic system and neocortex are crucial for spatial orientation.
Purpose of the Study:
- To review evidence of cognitive disorders caused by vestibular loss in animals and humans.
- To critically evaluate potential confounding factors such as hearing loss, motor control issues, oscillopsia, anxiety, and depression.
- To examine the impact of vestibular lesions on neural correlates of spatial memory and the effects of artificial vestibular stimulation.
Main Methods:
- Literature review of studies on vestibular loss and cognitive function.
- Analysis of evidence linking vestibular lesions to deficits in head direction and place cells.
- Examination of research on galvanic vestibular stimulation (GVS) and its effects on cognition.
Main Results:
- Substantial evidence indicates vestibular loss causes cognitive disorders, especially spatial memory deficits.
- Deficits are not solely attributable to hearing loss, motor control problems, oscillopsia, or anxiety/depression.
- Vestibular lesions impact key cells involved in spatial navigation; GVS shows potential to modulate cognitive function.
Conclusions:
- Vestibular dysfunction is a significant contributor to cognitive impairments, particularly in spatial memory.
- The role of ascending vestibular pathways in cognitive function is increasingly recognized.
- Further research into vestibular system's influence on cognition and therapeutic potential of GVS is warranted.