PMID: 15224861Jul 1, 2004Paper

Low-frequency loud acoustic stimulation and goal-directed arm movements

Acta Oto-laryngologica
Diana TroianiErmanno Manni

Abstract

To analyse the effects of low-frequency loud acoustic stimulation on goal-directed movements involving the arm. Low-frequency sound stimulation impairs eye stability, evokes a subjective tilt of the visual surround in subjects presenting Tullio's phenomenon and induces, in normal subjects, short-latency evoked potentials in the neck and limb muscles. Healthy subjects performed goal-directed movements in the horizontal plane with the right (dominant) arm to a fixed 3 degree-wide target positioned at an angle of 30 degrees, with the instruction to perform fast and accurate movements to the target and to hold the final position. This fast-pointing task was performed in association with sound-induced vestibular-otolithic stimulation (110 dB SPL, 500 Hz) in the absence of visual guidance (i.e. pointing at a memorized target in the absence of target or pointer cues). Pointing errors were analysed by computing the constant errors made by the subjects (mean error). Pointing errors were also correlated with movement kinematics (movement duration, peak velocity, time to peak velocity) and with the reaction time of movement. The low-frequency loud acoustic stimulation modified the final position of the arm-pointing task at the memorized t...Continue Reading

References

Nov 10, 1998·The Journal of Physiology·A S Cauquil, B L Day
Feb 15, 2001·Current Opinion in Neurology·J G Colebatch
Jul 20, 2001·Experimental Brain Research·S V AdamovichA G Feldman

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Citations

Aug 23, 2006·Experimental Brain Research·Michael D EllisJulius P A Dewald

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