Human self-motion perception during translatory vestibular and proprioceptive stimulation

Hlavačka, F; Mergner, Thomas; Bolha, B.

doi:10.1016/0304-3940(96)12667-7

Cited by 30 publications

(13 citation statements)

References 6 publications

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“…The observed patterns of vestibulo‐proprioceptive interaction indicated that the subjects used the vestibular signal primarily to estimate the motion of the feet and the foot support. Analogous findings were also obtained with horizontal translatory movements between the body and the legs 12. These observations led to the general conclusion that during movement on firm ground the unreliable vestibular signal (large noise at low frequency) is not used directly for our self‐motion perception.…”

Section: Scenario Identification and Representationsupporting

confidence: 72%

“…Analogous findings were also obtained with horizontal translatory movements between the body and the legs. 12 These observations led to the general conclusion that during movement on firm ground the unreliable vestibular signal (large noise at low frequency) is not used directly for our self-motion perception. Rather, its main function is to establish an internal notion of the body support kinematics.…”

Section: Scenario Identification and Representationmentioning

confidence: 99%

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A Modeling Approach to the Human Spatial Orientation System

Mergner¹,

Becker

2003

Annals of the New York Academy of Sciences

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The human spatial orientation system is highly complex and nonlinear. It is difficult, therefore, to arrive at an unequivocal model of the underlying processing by merely combining the known elementary mechanisms ("bottom-up" approach); additional "top-down" concepts are required to narrow the choice between several formally equivalent solutions. We here suggest a concept in which sensorimotor control is based on a meta-level that provides an internal representation of the physical stimuli acting upon a subject (e.g., tilt of the support surface), whereas the classic reflex concept essentially proceeds from a direct coupling between physiological stimuli, sensors and actuators. At the hypothesized meta-level, the axial body segments are represented as a stack of superimposed platforms with the lowermost platform (generally the feet) riding on a support surface that acts as the buttress for the subject's active movements. From the sensory point of view, this stack constitutes a system of nested references. This concept explains data from various experiments dealing with self- and object motion perception and body stabilization in a more exhaustive way than does the classic concept. In our view, it provides a robust, flexible, and modular framework for perception and action in space.

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Section: Scenario Identification and Representationsupporting

confidence: 72%

Section: Scenario Identification and Representationmentioning

confidence: 99%

A Modeling Approach to the Human Spatial Orientation System

Mergner¹,

Becker

2003

Annals of the New York Academy of Sciences

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“…Thus, within a relatively short timeframe, healthy humans are able to adapt and adjust their The adaptive adjustments to the individual perturbations are combined with a second adaptive process: "strategic" adjustments of body posture or body kinematics such as leaning forward [2], [3], [6]. Perturbations evoked by vibratory stimulations induce simultaneous body movements in all body segments, corresponding to an approximate single-link pendulum pattern [20], [33]. Since ankle joint stiffness depends on the moment carried by the joints [34], there is a possibility that by leaning more or less forward a proper level of ankle stiffness can be chosen by adjusting the postural alignment.…”

Section: Discussionmentioning

confidence: 99%

“…Perturbations evoked by vibratory stimulations induce simultaneous body movements in all body segments, corresponding to an approximate single-link pendulum pattern [20], [33]. Since ankle joint stiffness depends on the moment carried by the joints [34], there is a possibility that by leaning more or less forward a proper level of ankle stiffness can be chosen by adjusting the postural alignment.…”

Section: Discussionmentioning

confidence: 99%

Adaptation to vibratory perturbations in postural control

Fransson

Johansson

Tjernström

et al. 2003

IEEE Eng. Med. Biol. Mag.

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General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal Take down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.A daptation and habituation are common in biological systems for movement control [1], and the ability to adjust postural control performance is of major importance during many human activities [2], [3]. Postural control uses sensory information from the visual, vestibular, and somatosensory receptors in order to detect and control the movements and coordinate voluntary and reflexive muscle responses while maintaining stability [4], [5]. The organization and coordination of the mechanical body motions have been extensively studied from the perspectives of biomechanical, neurological, and control system analysis [6]- [10]. However, the dynamical coupling between body segments, where action of one segment will affect the motions of other parts of the body, is difficult to analyze both theoretically and experimentally. The postural movements are restricted by the muscular and skeletal organization and by the geometrical configuration of the body consisting of segments moving in an interrelated fashion to each other. The ability to generate motions of the body segments are also related to the requirements of muscle force and restricted by the flexibility in the muscles, joints, and tendons [4], [11], [12].The possibility that adaptation and muscle fatigue may lead to multimuscle and multijoint coordination changes, and reorganization of movements, has received little attention in previous studies. The regulation of the orthograde posture constitutes an essential topic of motor control not only to maintain the static posture but also to ensure body stability during various locomotory movements [13]. It is well known that the CNS employs both feedforward (predictive) and feedback (reactive) control to compensate for the perturbations that might occur during movement. Appropriate feedforward compensations, based on an adaptive internal model of the system and the expected external conditions, can greatly reduce the magnitude of required reactive responses [15]. The adaptive adjustments by the CNS during the execution of a postural task to reduce the likelihood of balance loss is of particular relevance to fall prevention [15], [16].A recent development in posturography analysis is the use of system identification to describe the feedforward...

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“…Questions thus arise as to how this multisensory feedback contributes to the encoding of movement parameters and how each sensory modality interacts with other. The combination of two sensory modalities, such as vision plus muscle proprioception [12]–[16], vestibular system plus muscle proprioception [17]–[19], vestibular system plus vision [20], [21], or touch plus muscle proprioception [8], [10], [11], [22], has generally been shown to improve the resulting perceptual or motor responses, whether it concerns the whole body or a single segment. The conclusions of these studies stress the need to integrate convergent inputs to properly assess body configuration and any changes that may occur.…”

Section: Introductionmentioning

confidence: 99%

Differential Contributions of Vision, Touch and Muscle Proprioception to the Coding of Hand Movements

Blanchard

Roll

et al. 2013

PLoS ONE

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To further elucidate the mechanisms underlying multisensory integration, this study examines the controversial issue of whether congruent inputs from three different sensory sources can enhance the perception of hand movement. Illusory sensations of clockwise rotations of the right hand were induced by either separately or simultaneously stimulating visual, tactile and muscle proprioceptive channels at various intensity levels. For this purpose, mechanical vibrations were applied to the pollicis longus muscle group in the subjects’ wrists, and a textured disk was rotated under the palmar skin of the subjects’ right hands while a background visual scene was projected onto the rotating disk. The elicited kinaesthetic illusions were copied by the subjects in real time and the EMG activity in the adductor and abductor wrist muscles was recorded. The results show that the velocity of the perceived movements and the amplitude of the corresponding motor responses were modulated by the nature and intensity of the stimulation. Combining two sensory modalities resulted in faster movement illusions, except for the case of visuo-tactile co-stimulation. When a third sensory input was added to the bimodal combinations, the perceptual responses increased only when a muscle proprioceptive stimulation was added to a visuo-tactile combination. Otherwise, trisensory stimulation did not override bimodal conditions that already included a muscle proprioceptive stimulation. We confirmed that vision or touch alone can encode the kinematic parameters of hand movement, as is known for muscle proprioception. When these three sensory modalities are available, they contribute unequally to kinaesthesia. In addition to muscle proprioception, the complementary kinaesthetic content of visual or tactile inputs may optimize the velocity estimation of an on-going movement, whereas the redundant kinaesthetic content of the visual and tactile inputs may rather enhance the latency of the perception.

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Human self-motion perception during translatory vestibular and proprioceptive stimulation

Cited by 30 publications

References 6 publications

A Modeling Approach to the Human Spatial Orientation System

A Modeling Approach to the Human Spatial Orientation System

Adaptation to vibratory perturbations in postural control

Differential Contributions of Vision, Touch and Muscle Proprioception to the Coding of Hand Movements

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