scholarly journals Effects of stimulation intensity, gender and handedness upon auditory evoked potentials

1992 ◽  
Vol 50 (1) ◽  
pp. 43-49 ◽  
Author(s):  
Susana Camposano ◽  
Fernando Lolas
Keyword(s):  
Corpus Callosum ◽  
Evoked Potentials ◽  
Stimulus Intensity ◽  
Auditory Evoked Potentials ◽  
Right Hemisphere ◽  
Cognitive Components ◽  
Left Handed ◽  
And Gender ◽  
The Right ◽  
Cortical Auditory Evoked Potentials

Left handers and women show less anatomical brain asymmetry, larger corpus callosum and more bilateral representation of specific functions. Sensory and cognitive components of cortical auditory evoked potentials (AEF) have been shown to be asymmetric in right handed males and to be influenced by stimulus intensity. In this study the influence of sex, handedness and stimulus intensity upon AEP components is investigated under basal conditions of passive attention. 14 right handed males, 14 right handed females, 14 left handed males, and 14 left handed females were studied while lying awake and paying passive attention to auditory stimulation (series of 100 binaural clicks, duration 1 msec, rate 1/sec, at four intensities). Cz, C3 and C4 referenced to linked mastoids and right EOG were recorded. Analysis time was 400 msec, average evoked potentials were based on 100 clicks. Stimulus intensity and gender affect early sensory components (P1N1 and N1P2) at central leads, asymmetry is influenced only by handedness, right handers showing larger P1N1 amplitudes over the right hemisphere.

Effects of Hearing Aid Amplification and Stimulus Intensity on Cortical Auditory Evoked Potentials

2007 ◽  
Vol 12 (4) ◽  
pp. 234-246 ◽  
Author(s):  
Curtis J. Billings ◽  
Kelly L. Tremblay ◽  
Pamela E. Souza ◽  
Malcolm A. Binns
Keyword(s):  
Evoked Potentials ◽  
Stimulus Intensity ◽  
Auditory Evoked Potentials ◽  
Hearing Aid ◽  
Cortical Auditory Evoked Potentials

scholarly journals Auditory interhemispheric transfer in relation to patterns of partial agenesis and hypoplasia of the corpus callosum in spina bifida meningomyelocele

2008 ◽  
Vol 14 (5) ◽  
pp. 771-781 ◽  
Author(s):  
H. JULIA HANNAY ◽  
AMY WALKER ◽  
MAUREEN DENNIS ◽  
LARRY KRAMER ◽  
SUSAN BLASER ◽  
...  
Keyword(s):  
Spina Bifida ◽  
Corpus Callosum ◽  
Right Hemisphere ◽  
Typically Developing ◽  
Functional Laterality ◽  
Left Handed ◽  
Right Ear Advantage ◽  
The Right ◽  
Spina Bifida Meningomyelocele ◽  
Normal Controls

Spina bifida meningomyelocele with hydrocephalus (SBM) is commonly associated with anomalies of the corpus callosum (CC). We describe MRI patterns of regional CC agenesis and relate CC anomalies to functional laterality based on a dichotic listening test in 90 children with SBM and 27 typically developing controls. Many children with SBM (n = 40) showed regional CC anomalies in the form of agenesis of the rostrum and/or splenium, and a smaller number (n = 20) showed hypoplasia (thinning) of all CC regions (rostrum, genu, body, and splenium). The expected right ear advantage (REA) was exhibited by normal controls and children with SBM having a normal or hypoplastic splenium. It was not shown by children with SBM who were left handed, missing a splenium, or had a higher level spinal cord lesion. Perhaps the right hemisphere of these children is more involved in processing some aspects of linguistic stimuli. (JINS, 2008, 14, 771–781.)

Contralateral White Noise Masking Affects Auditory N1 and P2 Waves Differently

2003 ◽  
Vol 17 (4) ◽  
pp. 189-194 ◽  
Author(s):  
Sirkku K. Salo ◽  
A. Heikki Lang ◽  
Altti J. Salmivalli ◽  
Reijo K. Johansson ◽  
Maija S. Peltola
Keyword(s):  
Evoked Potentials ◽  
White Noise ◽  
Auditory Evoked Potentials ◽  
Normal Hearing ◽  
Mask Condition ◽  
Noise Masking ◽  
The Right ◽  
Cortical Auditory Evoked Potentials ◽  
Contralateral Masking ◽  
Hearing System

Abstract In this study, we examined the effect of contralateral masking on cortical auditory evoked potentials N1 (modal-specific slowly adapting component) and P2 at different masking intensities. N1 and P2 potentials were recorded from 15 subjects with normal hearing using 500Hz tone pips (intensity 65dB HL, duration 100ms, ISI 1s) presented to the right ear. Continuous white noise was delivered to the left ear at the intensities of 35, 50, 65, or 75dB effective masking level (EML), as well as a no-mask condition. The electrodes F3, Fz, F4, C3, Cz, C4, and Pz were used. The results show that N1 amplitude was significantly attenuated and, in contrast, P2 amplitude was significantly increased, with contralateral 75dB EML white noise. N1P2 peak to peak amplitude was not affected by masking, nor were the peak latencies. Thus, contralateral masking affects the exogenous cortical evoked N1 and P2 curves differently. We suggest that the effect is mediated by the efferent hearing system. The effect of ≤ 50dB EML contralateral white noise masking is so small that it should not affect clinical recordings.

scholarly journals Changes in response characteristics of cortical auditory evoked potentials in bilateral cochlear implantees

2017 ◽  
Vol 4 (1) ◽  
pp. 197
Author(s):  
Sathiya Murali ◽  
Sunil Goyal ◽  
Kiran Natarajan ◽  
Senthil Vadivu Arumugam ◽  
Neha Chauhan ◽  
...  
Keyword(s):  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Response Characteristics ◽  
Binaural Stimulation ◽  
Monaural Stimulation ◽  
Measure Change ◽  
The Difference ◽  
The Right ◽  
Cortical Auditory Evoked Potentials ◽  
Impaired Children

<p class="abstract"><strong>Background:</strong> Cochlear implants (CIs) represents the most successful intervention to restore hearing in profoundly hearing impaired children and adults. An objective measures such as cortical auditory evoked potentials (CAEPs) would provide more insights to the auditory process involved in post implantation. Aim of the study was to profile the change in response characteristics of CAEPs in simultaneous binaural cochlear implantees. Objective was to measure change in latency and amplitude in monoaural and binaural condition for speech stimulus with change in intensities.</p><p class="abstract"><strong>Methods:</strong> Ours study is an observational retrospective study done at a tertiary ENT referral centre in south India, between Jan 2014 to Dec 2015. Out of total 15 patients with bilateral cochlear implantation, 7 consecutive bilateral simultaneous cochlear implantees with chronological age between 2-6 years were included in the study. Only pre-lingual congenital hearing loss children with no syndromic associations and normal cochlear anatomy were included while, peri-lingual, post-lingual children and children with sequential bilateral implantation were excluded from the study.  </p><p class="abstract"><strong>Results:</strong> Amplitude of P1 was higher for binaural stimulation compared to monoaural stimulation. Latency of P1 was smaller for binaural compared to monoaural stimulus. In monaural stimulation the latency of P1 was smaller in right ear compared to left ear. However the difference between the right ear, left ear and binaural conditions were not statistically significant. Ours is a preliminary study and more bilateral implantees will be included in future studies to give more power to the study.</p><p><strong>Conclusions:</strong> We suggest that CAEPs can be used as a useful objective tool for assessment of post CI outcome.</p>

New possibility for measuring the cortical auditory evoked potentials: the HEARLab

2014 ◽  
Vol 155 (38) ◽  
pp. 1524-1529
Author(s):  
Ádám Bach ◽  
Ferenc Tóth ◽  
Vera Matievics ◽  
József Géza Kiss ◽  
József Jóri ◽  
...  
Keyword(s):  
Clinical Practice ◽  
Evoked Potentials ◽  
Auditory System ◽  
Hearing Aids ◽  
Pure Tone ◽  
Auditory Evoked Potentials ◽  
Normal Hearing ◽  
Speech Stimuli ◽  
Novel Method ◽  
Cortical Auditory Evoked Potentials

Introduction: Cortical auditory evoked potentials can provide objective information about the highest level of the auditory system. Aim: The purpose of the authors was to introduce a new tool, the “HEARLab” which can be routinely used in clinical practice for the measurement of the cortical auditory evoked potentials. In addition, they wanted to establish standards of the analyzed parameters in subjects with normal hearing. Method: 25 adults with normal hearing were tested with speech stimuli, and frequency specific examinations were performed utilizing pure tone stimuli. Results: The findings regarding the latency and amplitude analyses of the evoked potentials confirm previously published results of this novel method. Conclusions: The HEARLAb can be a great help when performance of the conventional audiological examinations is complicated. The examination can be performed in uncooperative subjects even in the presence of hearing aids. The test is frequency specific and does not require anesthesia. Orv. Hetil., 2014, 155(38), 1524–1529.

scholarly journals Sensory deficits in ipsilesional upper-extremity in chronic stroke patients

2015 ◽  
Vol 73 (10) ◽  
pp. 834-839 ◽  
Author(s):  
Núbia Maria Freire Vieira Lima ◽  
Karina Cândido Menegatti ◽  
Érica Yu ◽  
Natália Yumi Sacomoto ◽  
Thais Botossi Scalha ◽  
...  
Keyword(s):  
Right Hemisphere ◽  
Thermal Sensation ◽  
Chronic Stroke ◽  
Sensory Loss ◽  
Stroke Patients ◽  
Sensory Assessment ◽  
Sensory Deficits ◽  
Left Handed ◽  
Right Hemisphere Damage ◽  
The Right

Objective To investigate somatosensory deficits in the ipsilesional wrist and hand in chronic stroke patients and correlate these deficits with contralesional sensorimotor dysfunctions, functional testing, laterality and handedness.Methods Fifty subjects (twenty-two healthy volunteers and twenty-eight stroke patients) underwent evaluation with Semmes-Weinstein monofilaments, the sensory and motor Fugl-Meyer Assessment, the Nottingham Sensory Assessment in both wrists and hands and functional tests.Results Twenty-five patients had sensory changes in the wrist and hand contralateral to the stroke, and eighteen patients (64%) had sensory deficits in the ipsilesional wrist and hand. The most significant ipsilesional sensory loss was observed in the left-handed patients. We found that the patients with brain damage in the right hemisphere had better scores for ipsilesional tactile sensation.Conclusions A reduction in ipsilesional conscious proprioception, tactile or thermal sensation was found in stroke subjects. Right hemisphere damage and right-handed subjects had better scores in ipsilesional tactile sensation.

Aesthetic Preference and Lateral Dominance

1988 ◽  
Vol 67 (2) ◽  
pp. 555-561 ◽  
Author(s):  
Mary Ann Valentino ◽  
James W. Brown ◽  
W. A. Cronan-Hillix
Keyword(s):  
Right Hemisphere ◽  
Response Mode ◽  
Psychology Student ◽  
Manual Response ◽  
Verbal Responses ◽  
Left Handed ◽  
Manual Responses ◽  
Student Subjects ◽  
The Right ◽  
Aesthetic Preferences

Aesthetic preferences for photographs with the main focal content either to the left or right of the photograph's center were examined in right- and left-handed subjects. Verbal responses or manual responses were required. In one experiment with 261 introductory psychology student-subjects, left-handers more often preferred photographs with the more important part on the left (“left-geared”) than did right-handers. Exp. 2, involving 84 right-handed student subjects, showed that left-geared photographs presented on the left side were preferred more often than left-geared photographs presented on the right side, and left-geared photographs presented on the left side were more often chosen when a left-handed manual response was required. Interactions between handedness, position of the stimulus, language hemisphere, and response mode make it extremely difficult to ascertain whether the right hemisphere is really more involved in aesthetic decisions.

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