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Signal Processing Related to the Vestibulo‐Ocular Reflex during Combined Angular Rotation and Linear Translation of the Head
Author(s) -
MCCREA ROBERT A.,
CHENHUANG CHIJU
Publication year - 1999
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.1999.tb09176.x
Subject(s) - vestibulo–ocular reflex , rotation (mathematics) , reflex , head (geology) , signal (programming language) , righting reflex , translation (biology) , audiology , nystagmus , physics , medicine , computer science , neuroscience , psychology , artificial intelligence , biology , paleontology , biochemistry , messenger rna , gene , programming language
A bstract : The contributions of vestibular nerve afferents and central vestibular pathways to the angular (AVOR) and linear (LVOR) vestibulo‐ocular reflex were studied in squirrel monkeys during fixation of near and far targets. Irregular vestibular afferents did not appear to be necessary for the LVOR, since when they were selectively silenced with galvanic currents the LVOR was essentially unaffected during both far‐ and near‐target viewing. The linear translation signals generated by secondary AVOR neurons in the vestibular nuclei were, on average, in phase with head velocity, inversely related to viewing distance, and were nearly as strong as AVOR‐related signals. We suggest that spatial‐temporal transformation of linear head translation signals to angular eye velocity commands is accomplished primarily by the addition of viewing distance multiplied, centrally integrated, otolith regular afferent signals to angular VOR pathways.