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61
The Effect of Age on the Subjective Visual Vertical During Bilateral and Unilateral Centrifugation
In: ETSU Faculty Works (2012)
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62
Otolith Assessment
In: ETSU Faculty Works (2012)
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63
Vestibular Consequences of Mild Traumatic Brain Injury and Blast Exposure
In: ETSU Faculty Works (2012)
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64
Auditory, Vestibular, and Ocular Motor Consequences of Blast Exposure
In: ETSU Faculty Works (2012)
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65
A Comparison of the Subjective Visual Vertical across Rotational Chair Systems and Off-Axis Rotation Protocols
In: ETSU Faculty Works (2011)
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66
Effects of Stimulus and Recording Parameters on the Air Conduction Ocular Vestibular Evoked Myogenic Potential
In: ETSU Faculty Works (2011)
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67
Head Injury and Blast Exposure: Vestibular Consequences
In: ETSU Faculty Works (2011)
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68
Best Practice: Clinical Vestibular Assessment
In: ETSU Faculty Works (2011)
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69
The Effect of Age on the Vestibular Evoked Myogenic Potential and Sternocleidomastoid Muscle Tonic Electromyogram Level
In: ETSU Faculty Works (2011)
Abstract: Objective: Cervical vestibular evoked myogenic potentials (cVEMPs) are short-latency electromyogram (EMG) evoked by high-level acoustic stimuli recorded from the activated sternocleidomastoid muscle and used to evaluate otolith organ function. The purpose of this study was to investigate the effects of aging on the cVEMP and on the sternocleidomastoid muscle EMG level. Design: A cross-sectional observational study was used to investigate differences in cVEMP and sternocleidomastoid muscle EMG level in a group of 24 younger and 24 older individuals. cVEMPs were recorded during activation of the sternocleidomastoid muscle at target EMG levels ranging from 0 to 90 μV and during maximum voluntary contraction of the sternocleidomastoid muscle. Results: The sternocleidomastoid muscle EMG amplitude increased as a function of target EMG level for both age groups; however, the mean EMG amplitude was greater for the younger group than the older group, and the variability of EMG amplitude was greater for the older group. The EMG amplitude at maximum voluntary contraction ranged from 88 to 279 μV for the younger subjects and from 32 to 230 μV for the older subjects, and the mean EMG amplitude at maximum voluntary contraction was significantly greater for the younger group than the older group. The cVEMP amplitude increased as a function of EMG target level for each age group. Although cVEMP amplitude increased as a function of target EMG level for both groups, the older group exhibited smaller cVEMP amplitudes, overall, compared with the younger group. To separate the influence of EMG level from aging on cVEMP amplitude, only the responses obtained at the 30 μV target EMG level were considered for the statistical analysis because there was no significant difference in EMG level between groups at the 30 μV target level. The mean cVEMP amplitudes at the 30 μV target level were 101 and 51 μV for the younger and older groups, respectively, and a statistical analysis indicated that cVEMP amplitude for the younger group was significantly greater than the older group. Conclusions: The findings suggest that the decrement in cVEMP amplitude is related to both age-related changes in the vestibular system and age-related changes in the sternocleidomastoid muscle.
Keyword: age; and Ocular Physiology; Audiology and Speech-Language Pathology; Medical Anatomy; Medical Physiology; Musculoskeletal; Neural; Speech and Hearing Science; Speech Pathology and Audiology; sternocleidomastoid muscle; tonic electromyogram level; VEMP; vestibular evoked myogenic potentials
URL: https://dc.etsu.edu/etsu-works/1785
https://doi.org/10.1097/AUD.0b013e318213488e
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70
The Ocular Vestibular Evoked Myogenic Potential
In: ETSU Faculty Works (2011)
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71
Normative Data for the Subjective Visual Vertical Test during Centrifugation
In: ETSU Faculty Works (2011)
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72
Bone Conduction Ocular Vestibular Evoked Myogenic Potentials
In: ETSU Faculty Works (2011)
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73
Best Practice: Clinical Vestibular Assessment
In: ETSU Faculty Works (2011)
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74
The Effect of Noise Exposure on the Cervical Vestibular Evoked Myogenic Potential
In: ETSU Faculty Works (2011)
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75
VEMP Now!
In: ETSU Faculty Works (2011)
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76
Vestibular Grand Rounds
In: ETSU Faculty Works (2011)
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77
Clinical Perspectives in Audiology: Cervical Vestibular Evoked Myogenic Potentials
In: ETSU Faculty Works (2010)
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78
The Ocular Vestibular Evoked Myogenic Potential
In: ETSU Faculty Works (2010)
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79
Tests of Otolith Function
In: ETSU Faculty Works (2010)
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80
Normative Data for the Subjective Visual Vertical Test during Centrifugation
In: ETSU Faculty Works (2010)
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