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Related Concept Videos

The Vestibular System01:29

The Vestibular System

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The vestibular system is a set of inner ear structures that provide a sense of balance and spatial orientation. This system is comprised of structures within the labyrinth of the inner ear, including the cochlea and two otolith organs—the utricle and saccule. The labyrinth also contains three semicircular canals—superior, posterior, and horizontal—that are oriented on different planes.
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Equilibrium and Balance01:15

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The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...
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Auditory Perception01:17

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The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the...
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Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming the...
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Functional Brain Systems: Reticular Formation01:13

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The reticular formation is a complex network of gray and white matter located within the brainstem extending from the medulla to the midbrain.
Within the reticular formation, there are several distinct nuclei that can be classified into three broad categories. The Raphe nuclei are located along the midline of the brainstem. They are primarily known for their role in synthesizing and releasing serotonin, a neurotransmitter involved in regulating mood, appetite, sleep, and circadian rhythms. The...
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Indirect Motor Pathways01:22

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The indirect motor or extrapyramidal pathways originate in the brainstem, the lower portion of the brain that connects it to the spinal cord. They consist of several distinct tracts, each with specialized functions. The four main tracts of the indirect motor pathways are the vestibulospinal tract, the reticulospinal tract, the tectospinal tract, and the rubrospinal tract.
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...
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Updated: Mar 12, 2026

Using Unidirectional Rotations to Improve Vestibular System Asymmetry in Patients with Vestibular Dysfunction
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The vestibular system and cognition.

Paul F Smith1

  • 1aDepartment of Pharmacology and Toxicology, School of Biomedical Sciences bBrain Health Research Centre, University of Otago, Dunedin cBrain Research New Zealand Centre of Research Excellence dEisdell Moore Centre for Hearing and Balance Research, University of Auckland, New Zealand.

Current Opinion in Neurology
|November 16, 2016
PubMed
Summary
This summary is machine-generated.

Vestibular dysfunction is increasingly linked to cognitive impairment, particularly in older adults. This review examines new evidence suggesting vestibular issues may be a risk factor for dementia.

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Area of Science:

  • Neuroscience
  • Geriatrics
  • Otolaryngology

Background:

  • Growing body of research connects vestibular system disorders with cognitive decline.
  • The elderly population is particularly vulnerable to both vestibular dysfunction and cognitive impairment.

Purpose of the Study:

  • To critically review recent evidence linking vestibular dysfunction and cognitive impairment.
  • To evaluate the association in the context of existing literature, focusing on the elderly.

Main Methods:

  • Review of epidemiological and clinical studies published within the last year.
  • Analysis of research on cognitive impairment in various vestibular conditions, including otic capsule dehiscence and bilateral vestibulopathy.
  • Examination of studies investigating hippocampal atrophy and dementia risk in relation to vestibular impairment.

Main Results:

  • Recent studies reinforce the link between vestibular dysfunction and cognitive impairment, especially in the elderly.
  • Evidence suggests vestibular impairment is associated with hippocampal atrophy.
  • Vestibular dysfunction is increasingly considered a potential risk factor for dementia.

Conclusions:

  • Vestibular dysfunction, regardless of type, may lead to cognitive impairment, particularly in older individuals.
  • These findings have significant implications for the management of patients with vestibular disorders.
  • Further research is warranted to elucidate the mechanisms and clinical impact of this association.