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1 results

  • The saccule and gravity

  • Hiroaki Ichijo, Hisako Ichijo
  • Journal:
    The Journal of Laryngology & Otology , First View
    Published online by Cambridge University Press:
    23 June 2025, pp. 1-5
  • Background

    The important role of the saccule is the sensing of gravity. In other words, gravity always stimulates the macula of the saccule.

    Objectives

    The aim of this study was to clarify whether nystagmus and dizziness occur by intentional changes upon stimulation to the saccules.

    Methods

    The subjects were eight healthy humans. Experiment 1: Subjects were asked to maintain a supine position to check for nystagmus and dizziness. Experiment 2: Subjects were asked to tilt their heads 45º to the left in the supine position to check for nystagmus and dizziness. Experiment 3: Subjects were asked to maintain a left-ear-down 90º position to check for nystagmus and dizziness.

    Results

    In all the experiments, no one revealed nystagmus and no one complained of dizziness.

    Conclusion

    Neither nystagmus nor dizziness occurs by intentional changes in the stimulation to the saccules.