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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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Depth Perception and Spatial Vision01:15

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Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
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Major Somatic Sensory Pathways01:28

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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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Auditory Perception01:17

Auditory Perception

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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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Inertial Frames of Reference01:03

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Newton’s first law is usually considered to be a statement about reference frames. It provides a method for identifying a special type of reference frame: the inertial reference frame. In principle, we can make the net force on a body zero. If its velocity relative to a given frame is constant, then that frame is said to be inertial. So, by definition, an inertial reference frame is a reference frame where Newton's first law holds valid. Newton's first law applies to objects with...
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The vestibular system: a spatial reference for bodily self-consciousness.

Christian Pfeiffer1, Andrea Serino2, Olaf Blanke3

  • 1Center for Neuroprosthetics, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne Lausanne, Switzerland ; Laboratory of Cognitive Neuroscience, Brain Mind Institute, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne Lausanne, Switzerland.

Frontiers in Integrative Neuroscience
|May 27, 2014
PubMed
Summary
This summary is machine-generated.

The vestibular system, which senses head motion, is crucial for self-consciousness. It helps us feel our body

Keywords:
bodily self-consciousnessbody representationfirst-person perspectivemental spatial transformationmultisensory integrationself-locationself-motionvestibular cortex

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Sensory Processing

Background:

  • Self-consciousness involves the subjective experience of being an
  • Bodily self-consciousness is linked to spatial awareness, including body position and movement within gravity.
  • The vestibular system is key to sensing head position and motion in 3D space.

Purpose of the Study:

  • To review evidence on vestibular system contributions to spatial aspects of bodily self-consciousness.
  • To explore how vestibular input influences first-person perspective and self-location.
  • To discuss the role of specific posterior brain regions in integrating vestibular and multisensory information for self-consciousness.

Main Methods:

  • Literature review of recent neuroscientific and cognitive science data.
  • Analysis of studies investigating vestibular effects on spatial perception and body representation.
  • Comparison of findings across different sensory processing and spatial transformation tasks.

Main Results:

  • Vestibular system processing significantly impacts first-person perspective and self-location.
  • Vestibular input influences mental spatial transformations, self-motion perception, and body representation.
  • Four posterior brain regions (temporoparietal junction, parietoinsular vestibular cortex, ventral intraparietal region, medial superior temporal region) are identified as critical hubs.

Conclusions:

  • Vestibular cortical processing is essential for the spatial dimensions of bodily self-consciousness.
  • The vestibular system integrates bodily sensory signals with external space representations.
  • This integration is vital for neural encoding of spatial self-awareness.