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3 edition of Otolith-canal convergence in vestibular nuclei neurons found in the catalog.

Otolith-canal convergence in vestibular nuclei neurons

Otolith-canal convergence in vestibular nuclei neurons

final technical report submitted to NASA-Ames Research Center, NASA-Ames grant no. NAG2-786

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  • 35 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English

  • Vestibules.,
  • Neurons.,
  • Nuclear chemistry.,
  • Brain.,
  • Data processing.,
  • Otolith organs.,
  • Weightlessness.

  • Edition Notes

    Other titlesOtolith canal convergence in vestibular nuclei neurons
    Statementprincipal investigator, J. David Dickman.
    Series[NASA contractor report] -- 206685, NASA contractor report -- NASA CR-206685.
    ContributionsUnited States. National Aeronautics and Space Administration.
    The Physical Object
    Pagination1 v.
    ID Numbers
    Open LibraryOL17127956M

      The cranial nerve exam allows directed tests of forebrain and brain stem structures. The twelve cranial nerves serve the head and neck. the vestibular nuclei and the cochlear nuclei are close neighbors with adjacent inputs. Deficits in one or both systems could occur from damage that encompasses structures close to both. Neurons in the Author: OpenStaxCollege. Here we have characterized the response properties of fastigial neurons during translation as well as during earth-vertical and earth-horizontal axis rotations. This characterization of otolith/canal convergence in the FN allowed a direct comparison of the neural response properties in the deep cerebellar nuclei with vestibular nuclei cells.

      The vestibular nuclei are structures in the brains of mammals that are part of the vestibular system, which provides the organism with its sense of balance and awareness of the body's orientation in are associated with the vestibular nerve, which carries sensory data from the ear structures are located in the brainstem, an area in the lower rear part of the brain. Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit to get more information about this book, to buy it in print, or to download it as a free PDF.

    The vestibulo-ocular reflex (VOR) is a reflex, where activation of the vestibular system of the inner ear causes eye reflex functions to stabilize images on the retinas (when gaze is held steady on a location) during head movement by producing eye movements in the direction opposite to head movement, thus preserving the image on the center of the visual field(s). ISBN: OCLC Number: Description: viii, pages: illustrations ; 25 cm. Contents: 1 Introduction.- 2 Primary Vestibular Neurons.- Semicircular Canal Afferents.- Qualitative Response Characteristics.- Quantitative Response Characteristics.- Responses to Acceleration and Velocity Steps.- Response to.

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Otolith-canal convergence in vestibular nuclei neurons Download PDF EPUB FB2

Get this from a library. Otolith-canal convergence in vestibular nuclei neurons: final technical Otolith-canal convergence in vestibular nuclei neurons book submitted to NASA-Ames Research Center, NASA-Ames grant no.

NAG [J David Dickman; United States. National Aeronautics and Space Administration.]. Accordingly, nonconvergent canal-only neurons with spatial selectivities aligned with those of SCC afferents and convergent otolith + canal neurons characterized by extensive orthogonal canal convergence, as well as another class of NEM VN neurons sensitive to head tilt (not encountered in the present study) (but see Zhou et al.

), are important cell types within a postulated brain stem Cited by: Otolith-Canal Convergence In Vestibular Nuclei Neurons. By Xiao-Hong Si and J. David Dickman. Abstract. The current final report covers the period from June 1, to The primary objective of the investigation was to determine how information regarding head movements and head position relative to gravity is received and Author: Xiao-Hong Si and J.

David Dickman. Information processing regarding head movement and head position with respect to gravity takes place in the vestibular nuclei neurons that receive signals From the semicircular canals and otolith organs in the vestibular labyrinth.

These neurons must synthesize the information into a coded output signal that provides for the head and eye movement reflexes as well as the conscious perception of the body in Author: J.

David Dickman. Otolith and Canal Input in Vestibular Nuclei. Specificity of otolith and canal input was investigated in second-order vestibular neurons (2°VN). Especially the convergence of monosynaptic input from the three semicircular canals, the utricle, the lagena and the saccule was : Fumiyuki Goto.

Straka, H., S. Holler, and F. Goto. Patterns of canal and otolith afferent input convergence in frog second-order vestibular neurons.J Neurophysiol –, ; /jn Second-order vestibular neurons (2°VN) were identified in the isolated frog brain by the presence of monosynaptic excitatory postsynaptic poten-tials Cited by:   Convergent neurons were located in the caudoventral part of the lateral, the rostral part of the descending, and the medial vestibular nuclei.

Otolith-activated vestibular neurons in the superior vestibular nucleus were extremely rare. A high percentage of neurons received excitatory inputs from two nerve pairs, Cited by: movements (canal-only neurons) and were unresponsive to translation.

The canal-only central neurons encoded head rotation in SCC coordi-nates, exhibited little orthogonal canal convergence, and were character-ized with significantly higher sensitivities to rotation as compared to primary SCC afferents. Another fourth of the neurons modulated theirCited by: Locations of recorded vestibular neurons activated by stimulation of the HC and SAC nerves.

A Locations of the HC/SAC convergent neurons in the transverse sections of vestibular nuclei. Triangles indicate VS neuron, circles indicate VOS, empty diamonds indicate VO, squares indicate V neuron.

We studied the convergence of two afferent pairs of single vestibular neurons by selective stimulation of the horizontal semicircular canal (HC) and saccular (SAC) nerves, and the HC and utricular (UT) nerves in decerebrate cats.

All recorded neurons were classified as vestibulospinal (VS), vestibulo-oculospinal (VOS) or vestibulo-ocular (VO), by antidromic stimulation from the Cited by: Response dynamics of otolith afferents and central oto#th neurons.

In primates, vestibular nuclei neurons can be characterized by their sensitivity to head motion, eye movement, and body movement. One class of central vestibular neurons, termed vestibular only (VO. cochlear nuclei, and they are involved in localizing the source of a sound.

cochlear nuclei, and they determine the pitch of a sound. inferior colliculi, and they are used to relay the information directly to the primary auditory cortex. inferior colliculi, and they filter out irrelevant auditory information.

_Field,cAs C,4"7?7 OTOLITH-CANAL CONVERGENCE IN VESTIBULAR NUCLEI NEURONS NASA -Ames Grant No. NAG l -" Principal Investigator J. David Dickman, Ph.D. Associate Professor Departments of Surgery (Otolaryngology) and Anatomy The University of Miss|ssippi Medical Center North Stare Street Jackson, Mississippi () vestibular nuceli.

STUDY. PLAY. subdivisions of the vestibular nuclei. medial lateral superior descending. the vestibular nuclei can be considered to be a _____ transfer station. if the vestibular nuclei is like a transfer station, list which systems it has direct connections with.

Dickman, Otolith-Canal Convergence in Vestibular Nuclei Neurons Evans, Analysis of the Interaction of Environmental Signal Transduction Pathways Using Gravi-Compensation Evans, The Regulation of Growth in the Distal Elongation Zone of Maize Roots Ferl, Genetically Engineered Plant Biomonitors in.

The vestibular nuclei are situated on the dorsolateral border of core the hindbrain in the floor and lateral border of the fourth ventricle. In many sections the nuclei are interposed between the core of the hindbrain and the deep structures of the cerebellum (Fig.

sponse properties of otolith/canal-convergent vestibular nuclei neurons in rats during stimulation with pure linear acceleration. Each cell was first characterized in terms of its major canal input.

Otolith and canal integration on single vestibular neurons in cats Otolith and canal integration on single vestibular neurons in cats Uchino, Y.; Sasaki, M.; Sato, H.; Bai, R.; Kawamoto, E. Exp Brain Res () – DOI /s REVIEW Y.

Uchino Æ M. Sasaki Æ H. Sato R. Bai Æ E. Kawamoto Received: 1 July / Accepted: 2 August. For most vestibular nuclei neurons, the tuning ratio was small at the lowest stimulus frequencies and progressively increased with frequency.

Specifically, HC neurons were characterized by a flat Smax gain and an approximately fold increase of Smin gain per frequency by: We recorded from rostral vestibular (VN) and rostral fastigial nuclei (FN) neurons that did not respond to eye movements during three-dimensional (3D) vestibular and optokinetic stimulation (OKS).

The majority of neurons in both areas (76 and 69% in VN and FN, respectively) responded during both rotational and translational by:. otolith neurons, elicits eye movements in guinea pigs5 and humans.6 Clinical tests measure the EMG preparatory potentials for the eye movement – the so-called vestibular-ev o ke dmyogenic potentials (VEMPs).

Knowledge of vestibular neural projections to different muscle groups allows these VEMPs to be used as clinical tests of utricular.Approximately one fourth of the cells in the vestibular nuclei exclusively encoded rotational movements (Canal-Only neurons) and were unresponsive to translation.

The Canal-Only central neurons encoded head rotation in canal afferent coordinates, exhibited no orthogonal canal convergence and were characterized by significantly higher.Noradrenergic neurons in the locus ceruleus project to Purkinje dendrites in the molecular layer and with granule cells in the granular layer (Bloom et al.

; Kimoto et al. ).Dopaminergic fibres arising from the neurons in the ventral mesencephalic tegmentum project to the Purkinje and granule neurons of interposed and lateral cerebellar nuclei (Simon et al. ).