Response characteristics of vestibular evoked myogenic potentials recorded over splenius capitis in young adults and adolescents

Author(s):  
Karen A. Gordon ◽  
Joshua Baitz ◽  
Joshua J. Gnanasegaram ◽  
Carmen McKnight ◽  
Brian D. Corneil ◽  
...  
2019 ◽  
Vol 30 (04) ◽  
pp. 293-301
Author(s):  
Kathryn Makowiec ◽  
Devin McCaslin ◽  
Kelsey Hatton

AbstractThe purpose of this investigation was to evaluate the sensitivity and specificity of the ocular vestibular evoked myogenic potential (oVEMP) using two electrode montages in patients with confirmed unilateral superior semicircular canal dehiscence syndrome (SCDS).This study evaluated oVEMP response characteristics measured using two different electrode montages from 12 unilateral SCDS ears and 36 age-matched control ears (age range = 23–66). The oVEMP responses were elicited using 500 Hz tone-burst air conduction stimuli presented at an intensity of 95 dB nHL and a rate of 5.1/sec. The two electrode montages used are described as an “infraorbital” montage and a “belly-tendon” montage.Balance function laboratory embedded in a large, tertiary care otology clinic.The belly-tendon electrode montage resulted in significantly larger amplitude responses than the infraorbital electrode montage for the ears with SCDS and the normal control ears. For both electrode montages the ear with SCDS exhibited a significantly larger amplitude response, ∼50% larger than the response amplitude from the normal control ear. The belly-tendon montage additionally produced larger median increases in amplitude compared with the infraorbital montage. Specifically, the median increase in oVEMP N1-P1 amplitudes using the belly-tendon montage was 39% greater in control ears, 76% greater in the SCDS ears, and 17% greater in the contralateral SCDS ears.The belly-tendon electrode montage yields significantly larger oVEMP amplitude responses for participants with SCDS and normal control participants.


2017 ◽  
Vol 45 (9) ◽  
pp. 1212-1223 ◽  
Author(s):  
Aaron J. Camp ◽  
Chao Gu ◽  
Sharon L. Cushing ◽  
Karen A. Gordon ◽  
Brian D. Corneil

Author(s):  
Noreen L. Goggin ◽  
George E. Stelmach

ABSTRACTAn experiment is reported that examines kinematic measures, reaction time and response preparation differences between young and older adults, and movement response parameters in a precueing paradigm. Ten young and ten older adults performed 5 cm or 10 cm horizontal movements to the left or right with an electronic pen on a digitizing tablet. The precue (advance information) provided information about direction, extent, or both parameters. Dependent measures of reaction time (RT), movement time (MT), peak velocity, peak acceleration, peak deceleration, and their respective time values were analysed. The results indicate that young adults were significantly different on all dependent measures. Advance precue information was advantageous for all subjects as RT was faster when advance information was provided. In addition, both groups of subjects produced higher peak velocities when provided advance information about both direction and extent. Examination of the kinematics indicate that older adults produce movement patterns which display different response characteristics such as accelerating less rapidly and displaying a prolonged deceleration phase. Finally, older adults are less efficient than young adults at scaling velocity and acceleration over time between long and short movements when spatial accuracy constraints are minimal.


2020 ◽  
Vol 29 (3) ◽  
pp. 1389-1403
Author(s):  
Jessica Brown ◽  
Kelly Knollman-Porter

Purpose Although guidelines have changed regarding federally mandated concussion practices since their inception, little is known regarding the implementation of such guidelines and the resultant continuum of care for youth athletes participating in recreational or organized sports who incur concussions. Furthermore, data regarding the role of speech-language pathologists in the historic postconcussion care are lacking. Therefore, the purpose of this retrospective study was to investigate the experiences of young adults with history of sports-related concussion as it related to injury reporting and received follow-up care. Method Participants included 13 young adults with history of at least one sports-related concussion across their life span. We implemented a mixed-methods design to collect both quantitative and qualitative information through structured interviews. Participants reported experiencing 42 concussions across the life span—26 subsequent to sports injuries. Results Twenty-three concussions were reported to a parent or medical professional, 14 resulted in a formal diagnosis, and participants received initial medical care for only 10 of the incidents and treatment or services on only two occasions. Participants reported concussions to an athletic trainer least frequently and to parents most frequently. Participants commented that previous experience with concussion reduced the need for seeking treatment or that they were unaware treatments or supports existed postconcussion. Only one concussion incident resulted in the care from a speech-language pathologist. Conclusion The results of the study reported herein shed light on the fidelity of sports-related concussion care management across time. Subsequently, we suggest guidelines related to continuum of care from injury to individualized therapy.


Author(s):  
Steven M. Doettl

It has been widely accepted that the assessment of balance after concussion plays a large role in determining deficit. Qualitative balance assessments have been an established piece of the post-injury assessment as a clinical behavioral marker of concussion for many years. Recently more specific guidelines outlining the role of balance evaluation in concussion identification and management have been developed as part of concussion management tools. As part of the ongoing development of concussions protocols, quantitative assessment of balance function following concussion has also been identified to have an important role. Frequently imbalance and dizziness reported following concussion is assumed to be associated with post-concussion syndrome (PCS). While imbalance and dizziness are common complaints in PCS, they can also be a sign of additional underlying pathology. In cases of specific dizziness symptoms or limited balance recovery beyond the initial post-concussive period, a quantitative vestibular assessment may also be needed. Electronystagmography and videonystagmography (ENG/VNG), rotary chair testing (RCT), and vestibular evoked myogenic potentials (VEMPs) have all been identified as valid assessment tools for vestibular dysfunction following traumatic brain injury (TBI). The assessment of balance and dizziness following sports-related concussions is an integral piece of the puzzle for removal from play, assessment of severity, and management.


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