Encyclopedia of Bioastronautics

Living Edition
| Editors: Laurence R. Young, Jeffrey P. Sutton

Sensorimotor Adaptation, Including SMS

  • Rachael D. SeidlerEmail author
  • Ajitkumar P. Mulavara
Living reference work entry
DOI: https://doi.org/10.1007/978-3-319-10152-1_22-1

Definition

Sensorimotor adaptation refers to the capacity of the central nervous system to gradually update motor control to compensate for changes in sensory inputs from the environment or for changes in mechanical characteristics of the body. One example is learning to accommodate to the refraction of light in water when reaching for objects viewed through a diving mask. In the microgravity environment, somatosensory and vestibular inputs are quite different than they are on Earth. The body is unloaded, resulting in greater movement per unit of force. Moreover, on Earth the otoliths of the vestibular system signal angle of orientation of the head relative to a gravitational vector, which is absent in space. There is a resulting reinterpretation of head tilt as a linear acceleration which leads to motor control and perceptual disruptions on return to Earth. It is perhaps not surprising then that crewmembers report a high incidence of space motion sickness due to sensory conflict. In...

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.University of FloridaGainesvilleUSA
  2. 2.KBRwyleHoustonUSA
  3. 3.NASA Johnson Space CenterHoustonUSA

Section editors and affiliations

  • Peter Norsk
    • 1
    • 2
  1. 1.Center for Space MedicineBaylor College of MedicineHoustonUSA
  2. 2.Biomedical Research & Environmental Sciences DivisionNASA, Johnson Space CenterHoustonUSA