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Related Concept Videos

The Vestibular System01:29

The Vestibular System

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.
Equilibrium and Balance01:15

Equilibrium and Balance

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...
Major Somatic Sensory Pathways01:28

Major Somatic Sensory Pathways

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 posterior columns...
Indirect Motor Pathways01:22

Indirect Motor Pathways

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...
Auditory Perception01:17

Auditory Perception

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 cochlea, a...
Brainstem01:19

Brainstem

The brainstem, located inferior to the brain and superior to the spinal cord, serves as a bridge between the cerebrum and the spinal cord. It plays a vital role in relaying information and controlling critical life functions. It comprises three primary regions: the midbrain, pons, and medulla oblongata.
The Midbrain
The midbrain is located beneath the diencephalon and connects the cerebrum with the lower parts of the brain. The cerebral peduncles are prominent midbrain structures that house the...

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Using Unidirectional Rotations to Improve Vestibular System Asymmetry in Patients with Vestibular Dysfunction
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Published on: August 30, 2019

Internal models and neural computation in the vestibular system.

Andrea M Green1, Dora E Angelaki

  • 1Dépt. de Physiologie, Université de Montréal, 2960 Chemin de la Tour, Rm. 4141, Montreal, QC H3T 1J4, Canada. andrea.green@umontreal.ca

Experimental Brain Research
|November 26, 2009
PubMed
Summary
This summary is machine-generated.

The vestibular system processes self-motion and motor control. This review explores vestibular nuclei computations, including internal models for movement estimation and sensorimotor transformations.

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Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane
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Area of Science:

  • Neuroscience
  • Systems Neuroscience
  • Motor Control

Background:

  • The vestibular system is crucial for spatial self-motion perception and motor control.
  • Vestibular nuclei integrate sensory inputs (otolith organs, semicircular canals) with visual, somatosensory, and motor signals.
  • These nuclei form a brainstem-cerebellar circuit interconnected with the vestibulocerebellar cortex and deep cerebellar nuclei.

Purpose of the Study:

  • To review the properties of cell types within the vestibular nuclei.
  • To explore fundamental computations performed by the brainstem-cerebellar vestibular circuitry.
  • To highlight the role of internal models in vestibular processing.

Main Methods:

  • This is a review article, synthesizing existing research.
  • It analyzes computational problems and neural implementations within the vestibular system.
  • It draws parallels with other sensorimotor systems.

Main Results:

  • The vestibular nuclei perform sensorimotor transformations for reflex generation.
  • Neural computations enable inertial motion estimation and distinguish active from passive head movements.
  • Integration of vestibular and proprioceptive information is key for body motion estimation.

Conclusions:

  • Internal models are a common theme in solving computational problems within the vestibular system.
  • The vestibular system offers insights into neural processing strategies for both reflexive and voluntary movements.
  • It serves as a model for understanding common neural strategies across sensorimotor systems.