Publications by authors named "Naveen Nagaraj"

Purpose: Our aim was to (a) develop a sentence comprehension measure that distinguished between cognitive capacity and syntactic knowledge in school-age children and (b) examine the relationship between comprehension performance and cognitive variables (working memory capacity and retrieval from long-term memory).

Method: We developed and administered a picture selection sentence comprehension task to 122 school-age children representing varied cognitive abilities. We evaluated comprehension accuracy and response time in two syntactically identical conditions but with different cognitive demands incorporated in picture foils-one with low demand using superfluous adjectives and another with high demand using contrastive adjectives.

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In this perspective article, the author explores the connections between hearing loss, central auditory processing, and cognitive decline, offering insights into the complex dynamics at play. Drawing upon a range of studies, the relationship between age-related central auditory processing disorders and Alzheimer's disease is discussed, with the aim of enhancing our understanding of these interconnected conditions. Highlighting the evolving significance of audiologists in the dual management of cognitive health and hearing impairments, the author focuses on their role in identifying early signs of cognitive impairment and evaluates various cognitive screening tools used in this context.

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The purpose of the present study was to examine the influence of visual cues in audiovisual perception of interrupted speech by nonnative English listeners and to identify the role of working memory, long-term memory retrieval, and vocabulary knowledge in audiovisual perception by nonnative listeners. The participants included 31 Mandarin-speaking English learners between 19 and 41 years of age. The perceptual stimuli were noise-filled periodically interrupted AzBio and QuickSIN sentences with or without visual cues that showed a male speaker uttering the sentences.

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In the absence of uniform European regulations, there have been many differences in the training of perfusionists across Europe. Furthermore, there has been no uniform or single European accreditation of the profession. One of the objectives of The European Board of Cardiovascular Perfusion (EBCP) is to standardise and monitor training of perfusionists across Europe whilst offering support in accordance with national regulations.

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The role of working memory (WM) and long-term lexical-semantic memory (LTM) in the perception of interrupted speech with and without visual cues, was studied in 29 native English speakers. Perceptual stimuli were periodically interrupted sentences filled with speech noise. The memory measures included an LTM semantic fluency task, verbal WM, and visuo-spatial WM tasks.

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Objective: The main objective of this clinical capsule was to outline the narrative of three teen cochlear implant (CI) users who experienced a sudden increase in their CI electrode impedance values, which coincided with decreased overall speech perception ability. In addition, the study explored the following questions: Are there any similarities between cases? What recommendations should be made for continuing treatment regarding these cases?

Patients: Three teenagers who reported sudden change in CI benefit were included in this study.

Interventions: Electrode impedance values and speech identification scores were obtained routinely during the CI mapping appointments.

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We examined the relative contribution of auditory processing abilities (tone perception and speech perception in noise) after controlling for short-term memory capacity and vocabulary, to narrative language comprehension in children with developmental language disorder. Two hundred and sixteen children with developmental language disorder, ages 6 to 9 years ( = 7; 6), were administered multiple measures. The dependent variable was children's score on the narrative comprehension scale of the .

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The effect of non-informational speech spectrum noise as a distractor on cognitive and listening comprehension ability was examined in fifty-three young, normal hearing adults. Time-controlled tasks were used to measure auditory working memory (WM) capacity and attention switching (AS) ability. Listening comprehension was measured using a lecture, interview, and spoken narratives test.

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Unlabelled: The role of veno-venous extracorporeal membrane oxygenation therapy (V-V ECMO) in severe COVID-19 acute respiratory distress syndrome (ARDS) is still under debate and conclusive data from large cohorts are scarce. Furthermore, criteria for the selection of patients that benefit most from this highly invasive and resource-demanding therapy are yet to be defined. In this study, we assess survival in an international multicenter cohort of COVID-19 patients treated with V-V ECMO and evaluate the performance of several clinical scores to predict 30-day survival.

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We examined the relationship between cognitive-linguistic mechanisms and auditory closure ability in children. Sixty-seven school-age children recognized isolated words and keywords in sentences that were interrupted at a rate of 2.5 Hz and 5 Hz.

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Objective: The purpose of this scoping review was two-fold, (1) to provide information about the characteristics, type of service delivery, participant information and outcomes related to tele-audiology in clinical popluations, and (2) to describe documented facilitators and barriers to tele-audiology delivery from the perspectives of practitioners and service recipients. Knowledge of these findings can assist audiologists in considering remote service delivery options for their practices.

Design: A scoping review was conducted in November 2019 to identify English-language peer-reviewed journal articles published from 1 January 2010 to 30 October 2019 related to remote clinical service delivery in audiology.

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Objectives School-age children with and without parent-reported listening difficulties (LiD) were compared on auditory processing, language, memory, and attention abilities. The objective was to extend what is known so far in the literature about children with LiD by using multiple measures and selective novel measures across the above areas. Design Twenty-six children who were reported by their parents as having LiD and 26 age-matched typically developing children completed clinical tests of auditory processing and multiple measures of language, attention, and memory.

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The AngioVac is a vacuum-assisted percutaneous thrombectomy suction system. In critically ill patients, the sudden volume shift can result in abrupt hemodynamic changes thus leading to a cardiac right-left shunt with a high risk of paradoxical embolization. We describe a modified cardiopulmonary bypass circuit for the use of the AngioVac system that enables full cardiopulmonary support and reduces paradoxical thromboembolic risk.

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We examined susceptibility to auditory distraction and its association to working-memory capacity (WMC) in children (N=125) using a dichotic listening task. Performance in a dichotic listening task was measured with and without distracting multi-talker babble (MTB). Intrusion errors from the to-be-ignored ear and the overall errors of any type between the two conditions were modeled to explain the role of WMC and the potential moderating effect of MTB, while controlling for age.

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Our tertiary center provides 24/7 ECMO implantation and transport service nationwide. In 2018, 150 ECLS/ECMO were implanted, and 40 patients were transported on ECLS/ECMO. In this report, we describe a successful veno-arterial ECLS implantation in a super obese (BMI 78 kg/m) 50-year-old female patient at a primary care hospital with subsequent helicopter transfer to our tertiary center.

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Purpose: Our goal is to present the relationships between working memory (WM) and auditory processing abilities in school-age children.

Review And Discussion: We begin with an overview of auditory processing, the conceptualization of auditory processing disorder, and the assessment of auditory processing abilities in children. Next, we describe a model of WM and a model of auditory processing followed by their comparison.

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Persistence of excitation and neural adaptation are competing theories proposed to explain the mechanisms underlying psychophysical forward masking. Previous research has been directed towards finding models that accurately describe the phenomenon but cannot account for the underlying explanation. The current study was designed to determine which theory best accounts for results obtained from behavioral gap duration adjustment tasks.

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Purpose: We examined the association between speech perception in noise (SPIN), language abilities, and working memory (WM) capacity in school-age children. Existing studies supporting the Ease of Language Understanding (ELU) model suggest that WM capacity plays a significant role in adverse listening situations.

Method: Eighty-three children between the ages of 7 to 11 years participated.

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The role of working memory (WM) capacity and lexical knowledge in perceptual restoration (PR) of missing speech was investigated using the interrupted speech perception paradigm. Speech identification ability, which indexed PR, was measured using low-context sentences periodically interrupted at 1.5 Hz.

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Purpose: This study examined the relationship between working memory (WM) and speech comprehension in older adults with hearing impairment (HI). It was hypothesized that WM would explain significant variance in speech comprehension measured in multitalker babble (MTB).

Method: Twenty-four older (59-73 years) adults with sensorineural HI participated.

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Human speech consists of concomitant temporal modulations in amplitude and frequency that are crucial for speech perception. In this study, amplitude modulation (AM) detection thresholds were measured for 550 and 5000 Hz carriers with and without concurrent frequency modulation (FM), at AM rates crucial for speech perception. Results indicate that adding 40 Hz FM interferes with AM detection, more so for 5000 Hz carrier and for frequency deviations exceeding the critical bandwidth of the carrier frequency.

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Purpose: The primary purpose of this study was to test the effect of the combined use of trained standardized parents and a baby simulator on students' hearing screening and parental counseling knowledge and skills.

Method: A one-group pretest-posttest quasi-experimental study design was used to assess self-ratings of confidence in knowledge and skills and satisfaction of the educational experience with standardized parents and a baby simulator. The mean age of the 14 audiology students participating in this study was 24.

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Although there are many reported age-related declines in the human body, the notion that a central auditory processing deficit exists in older adults has not always been clear. Hearing loss and both structural and functional central nervous system changes with advancing age are contributors to how we listen, hear, and process auditory information. Even older adults with normal or near normal hearing sensitivity may exhibit age-related central auditory processing deficits as measured behaviorally and/or electrophysiologically.

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Understanding interrupted speech requires top-down linguistic and cognitive restoration mechanisms. To investigate the relation between working memory (WM) and perception of interrupted speech, 20 young adults were asked to recognize sentences interrupted at 2 Hz, 8 Hz, and a combination of 2 and 8 Hz. WM was measured using automated reading and operation span tasks.

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Purpose: The relative benefit of a single, flanking, high- or low-frequency decrement was assessed to better understand properties of spectral enhancement that may aid in algorithm design.

Method: Detection thresholds were measured for intensity increments applied to a narrow target band of frequencies embedded in a broadband signal while 400-Hz-wide, 9- or 12-dB-deep intensity decrements were placed above, below, or on both sides of the target band. A mono condition with no decrements was used as a control.

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