Changing Vertical Self-motion Perception

NCT ID: NCT04200820

Last Updated: 2020-05-27

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 20 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2019-12-05
• Study Completion Date: 2020-03-10

Brief Summary

The objective of this study is to explore the "vertical self-motion perception" on in healthy young individuals using an elevator as accelerator. Secondary aim is to explore the effects of repeated vertical acceleration on vertical vestibular sensibility.

Detailed Description

The detection of displacement is important information to maintaining balance, postural control, and gait during daily living activities. This detection of displacement or self-motion perception is accomplished by the human vestibular system, particularly the otolith organs, the sacculus and utriculus. Both primarily respond to whole-body acceleration or tilt in gravity. The saccule and utricle detect linear motion as well as the static orientation of the head relative to gravity, which is itself a linear acceleration. The saccule is more sensitive to vertical acceleration (sensing elevator acceleration) and the utricle is more sensitive to horizontal acceleration (sensing a car accelerate). The signals from the vestibular system are transmitted o the central nervous system for further processing.

Testing the otolith function is difficult since it always a combination of the tested inertial acceleration (t) and gravity (g). Therefore the Vector of acceleration is skew. An isolated vertical direction testing of the saccule is to our knowledge not done. Testing the function of the saccule in an elevator would eliminate the any horizontal accelerations other than gravity. Using the decelerations phase of an elevator ride during both up and down ride could give important inside of the self-motion perception (sensation of acceleration of a subject). The reaction force F which accts on the otolith would be maximal when the elevator ride downwards would stop. The force acting on the otolith when the elevator got upwards is breaking is smaller than g.

A better understanding the adaption of the self-motion perception could be beneficial for patients with hypersensitive vestibular functioning, e.g. patients with vestibular migraine. We hypothesized that (a) healthy subjects change the self-motion perception after hyper-stimulation with repeated vertical acceleration.

The objective of this study is to explore the "vertical self-motion perception" on in healthy young individuals using an elevator as accelerator. Secondary aim is to explore the effects of repeated vertical acceleration on vertical vestibular sensibility.

Conditions

Vestibular Function Tests

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: DIAGNOSTIC
• Blinding Strategy: NONE

Study Groups

Trampoline

The participants will jump on a mini-trampoline for 30 seconds and then will have a 30 seconds break. This will be repeated 16 times. This resulted in a cumulative total intervention time of 8 minutes.

Group Type: EXPERIMENTAL

Trampoline

Intervention Type: DIAGNOSTIC_TEST

During trampoline training that participants undergo constant change of vestibular stimulation. This triggers deep proprioception as well as other sensory inputs. This trigger might affect strength, body stability, muscle coordinative responses, joint movement amplitudes and spatial integration

Interventions

Trampoline

During trampoline training that participants undergo constant change of vestibular stimulation. This triggers deep proprioception as well as other sensory inputs. This trigger might affect strength, body stability, muscle coordinative responses, joint movement amplitudes and spatial integration

Intervention Type: DIAGNOSTIC_TEST

Eligibility Criteria

Inclusion Criteria

• Healthy young adults
• Signed informed consent after being informed

Exclusion Criteria

• Acute pain
• Chronic neck pain
• Undergone Neck surgery
• Any vestibular disorder
• Fear of elevators / claustrophobia
• Dizziness handicap inventory score >30

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 30 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

University of Zurich

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Jaap Swanenburg, PhD

Role: PRINCIPAL_INVESTIGATOR

University Hospital Zurich, Directorate of Research and Education

Locations

University Hospital Zurich, Directorate of Research and Education, Physiotherapy & Occupational Therapy Research

Zurich, Canton of Zurich, Switzerland

Countries

Switzerland

Other Identifiers

BASEC-Nr: 2019-01759

Identifier Type: -

Identifier Source: org_study_id