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On the time course of short-term forgetting: A human experimental model for the sense of balance
KTH, Skolan för teknik och hälsa (STH), Naturvetenskap och biomedicin, Omgivningsfysiologi. KTH, Skolan för teknik och hälsa (STH), Centra, Centrum för flyg- och rymdfysiologi, SAPC.
KTH, Skolan för teknik och hälsa (STH), Naturvetenskap och biomedicin, Omgivningsfysiologi. KTH, Skolan för teknik och hälsa (STH), Centra, Centrum för flyg- och rymdfysiologi, SAPC.
2016 (engelsk)Inngår i: Cognitive Neurodynamics, ISSN 1871-4080, E-ISSN 1871-4099, Vol. 10, nr 1, s. 7-22Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The primary aim of this study was to establish whether the decline of the memory of an angular displacement, detected by the semicircular canals, is best characterized by an exponential function or by a power function. In 27 subjects a conflict was created between the semicircular canals and the graviceptive systems. Subjects were seated, facing forwards, in the gondola of a large centrifuge. The centrifuge was accelerated from stationary to 2.5Gz. While the swing out of the gondola (66°) during acceleration constitutes a frontal plane angular-displacement stimulus to the semicircular canals, the graviceptive systems persistently signal that the subject is upright. During 6 min at 2.5Gz the perceived head and body position was recorded; in darkness the subject repeatedly adjusted the orientation of a luminous line so that it appeared to be horizontal. Acceleration of the centrifuge induced a sensation of tilt which declined with time in a characteristic way. A three-parameter exponential function (Y = Ae−bt + C) and a power function (Y = At−b + C) were fitted to the data points. The inter-individual variability was considerable. In the vast majority of cases, however, the exponential function provided a better fit (in terms of RMS error) than the power function. The mean exponential function was: y = 27.8e−0.018t + 0.5°, where t is time in seconds. Findings are discussed with connection to possible underlying neural mechanisms; in particular, the head-direction system and short-term potentiation and persistent action potential firing in the hippocampus are considered.

sted, utgiver, år, opplag, sider
Springer, 2016. Vol. 10, nr 1, s. 7-22
Emneord [en]
Short-term memory, Spatial memory, Spatial orientation, Vestibular memory, Vestibular psychophysics
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-179348DOI: 10.1007/s11571-015-9362-0ISI: 000368535200002Scopus ID: 2-s2.0-84955198736OAI: oai:DiVA.org:kth-179348DiVA, id: diva2:882654
Merknad

QC 20160128. QC 20160220

Tilgjengelig fra: 2015-12-15 Laget: 2015-12-15 Sist oppdatert: 2018-01-10bibliografisk kontrollert

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