Vibration-Induced Shift of the Subjective Visual Horizontal

Karlberg, Mikael; Aw, Swee T.; Hálmagyi, G. Michael; Black, Robert W.

doi:10.1001/archotol.128.1.21

Cited by 45 publications

(39 citation statements)

References 30 publications

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“…Their results suggest that in chronic UVD patients, at least, vibration of neck muscles or mastoid stimulates vestibular afferents. What is unclear is why Karlberg et al (2003) did not replicate the findings of their earlier work or that of others (Strupp et al 1998;Betts et al 2000;Karlberg et al 2002) of a greater subjective visual shift with ipsilesional neck vibration by finding a greater ocular torsion under these circumstances. One explanation offered is that maximal ocular torsion takes longer than the 10 s used to measure ocular torsion in their study (typically 1-2 minutes is used in studies using subjective visual measurements) (Karlberg et al 2003).…”

Section: Discussionmentioning

confidence: 90%

“…Normal subjects in the upright position can align the subjective visual vertical (SVV) within 2°-3°of gravitational (earth) vertical (Friedmann 1970;Dai et al 1989;Tribukait et al 1996;Karlberg et al 2002). When rotated to a tilted position in the roll plane, normal subjects become less accurate in aligning the SVV to gravitational vertical.…”

Section: Introductionmentioning

confidence: 99%

“…Biguer et al (1998) demontrated that dorsal neck vibration in the upright position causes a visual illusion of displacement of a visual target away from the side of vibration in normal subjects and suggested this was due to neck muscle proprioceptive stimulation. This illusory contralateral displacement of a visual target with neck vibration is magnified in vestibular-deficient patients compared with normals (Strupp et al 1998;Karlberg et al 2002). This magnified cervical afferent effect may be related to a compensatory response for a lack of labyrinthine inputs (Bless and De Graaf 1991;Strupp et al 1998).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Neck Muscle Vibration Alters Visually Perceived Roll in Normals

McKenna

Peng

Zee

2004

JARO - Journal of the Association for Research in Otolaryngolog

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The objective of this study was to determine whether vibration of dorsal neck muscles or of the mastoid bone or of both modified the perception of visual orientation in the head roll-tilt plane in normal subjects. Measurements of the subjective visual vertical (SVV) were obtained from 26 normal human subjects. Subjects reported the SVV in the upright and in the left and right 30°static head roll-tilt positions. Subjects then reported the SVV while vibration was applied to the left or right dorsal neck or left or right mastoid. Both head position and vibration independently modified settings of the SVV. In head-tilted positions, vibration of the upper dorsal neck muscles (on the side of the head opposite to the head tilt) caused a significantly greater shift of the SVV in the opposite direction of head roll-tilt compared to vibration of the lower dorsal neck muscles or of the mastoid. These results support a role for cervical somatosensory information in perception of visual orientation in the roll plane. Our findings may help explain the differences observed in visual orientation perception in normal subjects between head alone and whole-body roll-tilt. Finally, vibration of neck muscles in the head roll-tilted plane may be a useful method to test cervical somatosensory function possibly by increasing their response to external stimulation.

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Section: Discussionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Neck Muscle Vibration Alters Visually Perceived Roll in Normals

McKenna

Peng

Zee

2004

JARO - Journal of the Association for Research in Otolaryngolog

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“…How possible is it that neck muscle vibration sets up pressure waves which propagate to and induce vibration of the skull? Such a question has not been completed resolved and is still a matter of some debate (Betts et al 2000;Karlberg et al 2002Karlberg et al , 2003McKenna et al 2003). …”

Section: Evidence Supporting Causal Role For Neck Muscle Spindlesmentioning

confidence: 99%

Dorsal Neck Muscle Vibration Induces Upward Shifts in the Endpoints of Memory-Guided Saccades in Monkeys

Andersen¹

2004

Journal of Neurophysiology

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. Producing a movement in response to a sensory stimulus requires knowledge of the body's current configuration, and spindle organs embedded within muscles are a primary source of such kinesthetic information. Here, we sought to develop an animal model of kinesthetic illusions induced by mechanically vibrating muscles as a first step toward a mechanistic understanding of how kinesthesia is integrated into neural plans for action. We elected to examine the effects of mechanical vibration of dorsal neck muscles in head-restrained monkeys performing memoryguided saccades requiring them to look to the remembered location of a flashed target only after an imposed delay. During the delay on one-half of all trials, mechanical vibration (usually 1,500 ms in duration, 200 m in amplitude, 100 Hz in frequency) was applied to the dorsal aspect on one side of the monkey's neck. We compared the metrics of such vibration saccades to control saccades without vibration during the delay interval. Relative to control saccades, the endpoints of vibration saccades were shifted consistently upward, even though the variability in saccadic endpoints was unaltered. Although the stability of the eye was compromised during the delay interval of vibration trials, as evidenced by an increased incidence of upward drifts and downward microsaccades, vibration saccades displayed different metrics than control saccades, including an upwardly deviated radial direction and increased vertical amplitude. The influence of variations in the duration (500 -2,500 ms), amplitude (100 -300 m), or frequency (75-125 Hz) of vibration scaled well with the presumed change in spindle activity entrained by vibration. Comparisons of the profile of these results are made to the human literature. We conclude that neck muscle vibration induces alterations in oculomotor performance in monkeys consistent with a central interpretation of illusory neck flexion and downward gaze deviation due to increased activation in the spindles of neck extensor muscles.

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“…Human subjects can align the subjective visual vertical (SVV) to within 2-3°of the gravitational vertical [1][2][3][4]. This subjective directional sensation is believed to be significantly related to the vestibular otolith function, and is shifted to the ipsilateral side to the lesion in patients with unilateral vestibular dysfunction [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Effects of neck muscle vibration on subjective visual vertical: comparative analysis with effects on nystagmus

Kawase

Maki

Takata

et al. 2010

Eur Arch Otorhinolaryngol

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In patients with unilateral vestibular dysfunction, vibratory stimulation to the neck muscles not only induces shift of the subjective visual vertical (SVV), but also enhances the generation of nystagmus. In the present study, the effects of neck vibration on the SVV were compared with those on nystagmus in patients with unilateral vestibular schwannoma (14 patients; 6 males and 8 females, mean age 54.2 years). The results indicated that the presence of nystagmus and magnitude of the SVV were generally correlated, neck vibration significantly increased the abnormal shift of the SVV and the presence of nystagmus, and the effects of vibration to the ipsilateral dorsal neck were significantly larger than those to the contralateral dorsal neck on the SVV, whereas no significant difference was observed in slow phase velocity of nystagmus. The present study suggests that both SVV and nystagmus induced by vibration have many similar clinical features and may be important in assessing the unilateral vestibular dysfunction.

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Vibration-Induced Shift of the Subjective Visual Horizontal

Abstract: The sensitivity of the SVH test to chronic unilateral vestibular deficits can be improved by applying vibration to the SCM. The magnitude of vibratory SVH shift is related to the extent of unilateral deficit of the otolithic organs, vertical canals, or both.

Cited by 45 publications

References 30 publications

Neck Muscle Vibration Alters Visually Perceived Roll in Normals

Neck Muscle Vibration Alters Visually Perceived Roll in Normals

Dorsal Neck Muscle Vibration Induces Upward Shifts in the Endpoints of Memory-Guided Saccades in Monkeys

Effects of neck muscle vibration on subjective visual vertical: comparative analysis with effects on nystagmus

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