Test-Retest Reliability of the Acoustic Stapedial Reflex Test in Healthy Neonates

Mazlan, Rafidah; Kei, Joseph; Hickson, Louise

doi:10.1097/aud.0b013e31819c3ea0

Cited by 37 publications

(49 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The resulting application to adult ears with a BBN activator showed lower ASRTs than in clinical tests. The ASR procedures for neonatal ears used a range of reference frequencies from 0.8 to 2.8 kHz, which overlapped and extended the 1-kHz reference frequency that Mazlan et al (2009) used to detect ASR shifts in neonatal ears.…”

Section: Introductionmentioning

confidence: 99%

Aural Acoustic Stapedius-Muscle Reflex Threshold Procedures to Test Human Infants and Adults

Keefe

Feeney

Hunter

et al. 2016

JARO

View full text Add to dashboard Cite

Power-based procedures are described to measure acoustic stapedius-muscle reflex threshold and supra-threshold responses in human adult and infant ears at frequencies from 0.2 to 8 kHz. The stimulus set included five clicks in which four pulsed activators were placed between each pair of clicks, with each stimulus set separated from the next by 0.79 s to allow for reflex decay. Each click response was used to detect the presence of reflex effects across frequency that were elicited by a pulsed broadband-noise or tonal activator in the ipsilateral or contralateral test ear. Acoustic reflex shifts were quantified in terms of the difference in absorbed sound power between the initial baseline click and the later four clicks in each set. Acoustic reflex shifts were measured over a 40-dB range of pulsed activators, and the acoustic reflex threshold was objectively calculated using a maximum 10 likelihood procedure. To illustrate the principles underlying these new reflex tests, reflex shifts in absorbed sound power and absorbance are presented for data acquired in an adult ear with normal hearing and in two infant ears in the initial and follow-up newborn hearing screening exams, one with normal hearing and the other with a conductive hearing loss. The use of absorbed sound power was helpful in classifying an acoustic reflex shift as present or absent. The resulting reflex tests are in use in a large study of wideband clinical diagnosis and monitoring of middle-ear and cochlear function in infant and adult ears.

show abstract

Section: Introductionmentioning

confidence: 99%

Aural Acoustic Stapedius-Muscle Reflex Threshold Procedures to Test Human Infants and Adults

Keefe

Feeney

Hunter

et al. 2016

JARO

View full text Add to dashboard Cite

show abstract

“…The occurrence of acoustic reflex at 50, 55, or 60 dB was higher with the 1,000 Hz probe. Lower ASRTs were also found (10,21,22) and were justified by the small size of the external auditory canal of newborns by vibration of the wall of the canal after a sound stimulus. However, it is worth to mention that the minimum intensity for the analysis of AR in the equipment is 50 dB NPS.…”

Section: Discussionmentioning

confidence: 93%

“…With the 1,000 Hz probe, the average was 74.2 dB for the 1,000 Hz frequency and 62.9 dB for 2,000 Hz (Table 1). A study (21) found a mean of 93 dB for the 1,000 Hz and two other studies (10,22) found means of 73.05 and 76.2 dB for 1,000 and 2,000 Hz, respectively. In the these studies, no other frequencies were analyzed.…”

Section: Discussionmentioning

confidence: 99%

“…Despite its clinical important, the acoustic stapedius reflex test has not been widely used among infants (0-6 months old) (10) . Nowadays, there is no regulation for the research of acoustic reflex threshold in this population (19) ; some studies have tried to establish levels of ASRT for healthy newborns, by using different pure tones in broadband noise (BBN).…”

Section: Introductionmentioning

confidence: 99%

“…At the point where the magnitude of the acoustic admittance is maximal, there is a pressure peak in tympanometry and, under these conditions, with the same probe tone, the acoustic reflex is analyzed (7)(8)(9) . The acoustic reflex is defined as the lowest stimulus intensity able to produce a detectable change in acoustic admittance (5,6,10) . The analysis of the presence or absence of Acoustic Stapedial Reflex Threshold (ASRT) may indicate a middle-ear dysfunction, significant cochlear hearing loss, retrocochlear pathology, or dysfunction in the facial nerve (11)(12)(13)(14) .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Acoustic reflex on newborns: the influence of the 226 and 1,000 Hz probes

Jacob-Corteletti

Duarte

Zucki

et al. 2015

CoDAS

View full text Add to dashboard Cite

PURPOSE: To analyze the occurrence of acoustic reflex and its threshold on newborns using the 226 and 1,000 Hz probes. METHODS: Thirty-six newborns with "PASS" results in newborn hearing screening and tympanogram with one or two peaks for both probe tones were included. Group I comprised 20 full-term newborns without risk indicator for hearing loss, and Group II comprised 16 newborns with at least one risk indicator. The study about ipsilateral acoustic reflex thresholds was conducted in 500, 1,000, 2,000, and 4,000 Hz. RESULTS: The groups presented the acoustic reflex thresholds between 50 and 100 dB for both probe tones. In the comparison between the probes, there were differences in all frequencies evaluated in Group I, with the lowest threshold mean for the 1,000 Hz probe. In Group II, differences were detected at 2,000 Hz. The mean acoustic reflex thresholds were similar in both groups for the 226 Hz probe. There was a difference for the 1,000 Hz probe in all tested frequencies. The percentage of response was higher in both groups for the 1,000 Hz probe. The kappa test showed extremely poor agreement in the comparison of results between both probes. CONCLUSION: The occurrence of acoustic reflex was higher in newborns and its thresholds were lower with the 1,000 Hz probe both for healthy newborns and for newborns at risk.

show abstract

Quantification of the Stapedial Reflex Reveals Delayed Responses in Autism

Lukose

Brown

Barber³

et al. 2013

Autism Research

View full text Add to dashboard Cite

Autism is a developmental disorder characterized, in part, by sensory abnormalities. It is well established that most if not all patients with autism have problems with auditory processing, ranging from deafness to hyperacusis, and physiological testing of auditory function (i.e. auditory brain stem responses) implicates brain stem dysfunction in autism. Additionally, previous research from this lab has revealed significantly fewer auditory brain stem neurons in autistic subjects as young as 2 years of age. These observations have led us to hypothesize that objective, noninvasive measures of auditory function can be used as an early screening tool to identify neonates with an elevated risk of carrying a diagnosis of autism. Here, we provide a detailed quantitative investigation of the acoustic stapedial reflex (ASR), a three- or four-neuron brain stem circuit, in young autistic subjects and normal developing controls. Indeed, we find significantly lower thresholds, responses occurring at significantly longer latency and right-left asymmetry in autistic subjects. The results from this investigation support deficits in auditory function as a cardinal feature of autism and suggest that individuals with autism can be identified by their ASR responses.

show abstract

Test-Retest Reliability of the Acoustic Stapedial Reflex Test in Healthy Neonates

Cited by 37 publications

References 43 publications

Aural Acoustic Stapedius-Muscle Reflex Threshold Procedures to Test Human Infants and Adults

Aural Acoustic Stapedius-Muscle Reflex Threshold Procedures to Test Human Infants and Adults

Acoustic reflex on newborns: the influence of the 226 and 1,000 Hz probes

Quantification of the Stapedial Reflex Reveals Delayed Responses in Autism

Contact Info

Product

Resources

About