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- W4386692034 abstract "Abstract Many daily behaviors rely critically on estimates of our body’s motion and orientation in space. Vestibular signals are essential for such estimates but to contribute appropriately two key sets of computations are required. First, ambiguous motion information from the otolith organs must be combined with spatially transformed rotational signals (e.g., from the canals) to distinguish head translation from tilt. Second, tilt and translation estimates must be transformed from a head- to a body-centered reference frame to correctly interpret the body’s motion. Studies have shown that cells in the caudal cerebellar vermis (nodulus and ventral uvula, NU) reflect the output of the first set of computations to estimate translation and tilt. However, it remains unknown whether these estimates are encoded exclusively in head-centered coordinates or whether they reflect a further transformation towards body-centered coordinates. Here we addressed this question by examining how the 3D spatial tuning of otolith and canal signals on translation- and tilt-selective NU neurons varies with changes in head-re-body and body-re-gravity orientation. We show that NU cell tuning properties are consistent with head-centered coding of otolith signals during translation. Furthermore, while canals signals in the NU have been transformed into world-referenced estimates of reorientation relative to gravity (i.e., tilt), as needed to resolve the tilt-translation ambiguity, the resulting tilt estimates are encoded in head-centered coordinates. Our results thus suggest that body-centered motion and orientation estimates required for postural control, navigation and reaching are computed elsewhere either by further transforming NU outputs or via computations in other parallel pathways." @default.
- W4386692034 created "2023-09-13" @default.
- W4386692034 creator A5028292011 @default.
- W4386692034 creator A5042943507 @default.
- W4386692034 creator A5063769138 @default.
- W4386692034 creator A5071026740 @default.
- W4386692034 date "2023-09-12" @default.
- W4386692034 modified "2023-09-30" @default.
- W4386692034 title "Reference frames for encoding of translation and tilt in the caudal cerebellar vermis" @default.
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- W4386692034 doi "https://doi.org/10.1101/2023.09.09.556993" @default.