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Biomedical subjects

F E Musiek

Publications and source records attributed to F E Musiek.

84 records · Page 5Linked to original sources
PubMed1980

Auditory perceptual problems in children: considerations for the otolaryngologist and audiologist.

Five cases of children with auditory processing problems are presented. These children had essentially normal peripheral hearing and ENT exam, but were referred with a question of hearing loss. An auditory perceptual test battery including rapidly alternating speech (RASP), binaural fusion, low pass filtered speech (LPFS), competing sentences, staggered spondiac words (SSW), dichotic digits and frequency patterns was employed. Though some of these tests did not show a perceptual deficit, the majority did depict specific types of auditory processing problems. Based on the information provided by this test battery, appropriate diagnosis and therapy can be provided for the patient.

Auditory Perceptual Disorders↗
PubMed1979

SSW and dichotic digit results pre- and post-commissurotomy: a case report.

A 19-year-old right-handed male with normal peripheral hearing bilaterally, was tested on the SSW and dichotic digits before and after commissurotomy. SSW results showed a definite deficit for words presented to the left ear in both the competing and noncompeting conditions. Dichotic digit results showed complete inability on the part of the subject to report the digits presented to the left ear. These findings are similar to other dichotic test results previously reported on split-brain patients.

Adult↗
PubMedDate not supplied

Auditory brainstem response and eighth nerve lesions: a review and presentation of cases.

A review of salient features in the use of auditory brainstem response for the detection of eighth nerve lesions is presented. Three cases of acoustic tumors are discussed. These cases represent a normal pure-tone audiogram, one with a moderate loss, and one with no measurable hearing on the affected side. Interpretation of the auditory brainstem response in these cases is discussed in light of the various auditory brainstem response measures presented and the pure-tone audiometric data.

Adult↗
PubMedDate not supplied

The use of central auditory tests in a case of vasculitis.

A central auditory test battery including dichotic digits, competing sentences, frequency patterns, and the staggered spondaic word test was administered to a patient diagnosed as having vasculitis. Test batteries were conducted before prednisone treatment and 2 months later. The central tests were not only helpful in indicating probable intracranial right hemisphere involvement, but seemed to be sensitive to the patient's improvement over this 2-month period. This case demonstrated a potentially valuable application of central auditory assessment.

Arteritis↗
PubMedDate not supplied

Assessment of central auditory dysfunction: the dichotic digit test revisited.

A dichotic digit test was administered to 21 subjects with intracranial lesions. Twelve subjects had lesions limited to the cortex and nine had brain stem disorders. The dichotic digit test appeared to be a sensitive measure for detecting cortex and brain stem lesions. Laterality data indicated markedly reduced performance for the ear contralateral to the hemispheric lesion. Overall results were similar to previous reports on dichotic digits, supporting the use of this test as a screening procedure or part of a test battery for CNS evaluation.

Adult↗
PubMedDate not supplied

Reversible audiological results in a patient with an extra-axial brain stem tumor.

A case of a 32-yr-old patient with an extra-axial brain stem tumor is presented. Many postoperative audiological test results were reversed compared to the preoperative results. A variety of auditory measures were conducted to show which tests were sensitive to this patient's lesion. Also reported are some rather unique postoperative auditory changes which, in retrospect, provided an interesting view as to the extent of the lesion.

Adult↗
PubMedDate not supplied

Results of three dichotic speech tests on subjects with intracranial lesions.

Thirty adult subjects with intracranial lesions (12 brain stem and 18 hemispheric) were tested using Competing Sentences, Staggered Spondaic Words, and Dichotic Digits. In comparing these dichotic tests for their ability to detect abnormal performance for individual subjects, the Digit test appeared most sensitive, followed by the Staggered Spondaic Word test and Competing Sentences. This trend seemed to prevail for subjects with hemispheric and brain stem lesions. All three tests demonstrated greater ipsilateral ear deficits for subjects with brain stem lesions. However, for subjects with hemispheric lesions all tests showed generally poorer scores for the ear contralateral to the lesion. These results, as well as other types of analyses for comparing the three dichotic tests in this study, are discussed.

Adolescent↗
PubMedDate not supplied

The auditory brain stem response I-V amplitude ratio in normal, cochlear, and retrocochlear ears.

The auditory brain stem response I-V amplitude ratio was measured for 25 normal, 25 cochlear, and 25 retrocochlear ears. Results indicated that amplitude ratios of less than 1.00 seldom occurred in the normal or cochlear ears. However, 44% of the retrocochlear ears revealed an amplitude ratio of less than 1.00. Details of this analysis and discussion of the clinical implications of these results are presented.

Adolescent↗
PubMedDate not supplied

Auditory brainstem and middle latency evoked response sensitivity near threshold.

Auditory brainstem response (ABR) and middle latency evoked response (MLER) testing have been used successfully for assessing hearing sensitivity electrophysiologically. Though both procedures have their proponents, ABR seems to be the more popular of the two. However, this study shows that overall, MLER waves occur with greater frequency at low sensation level than ABR waves. Specifically, MLER wave Pa was the most sensitive wave, followed by ABR wave V, MLER wave Pb, ABR wave III, MLER wave Pc, and ABR wave I. Latencies were more consistent and predictable for ABR than MLER. However, as expected, amplitudes for MLER wave were greater than those for ABR. Given these results, those involved in measuring hearing sensitivity electrophysiologically are encouraged to consider the potential of the MLER measure and not limit their scope of assessment to ABR.

Acoustic Stimulation↗
PubMedDate not supplied

Auditory dysfunction caused by multiple sclerosis: detection with MR imaging.

We reviewed the MR examinations of 167 patients who presented over a 3-year period with a chief symptom of hearing loss and/or tinnitus. In 14 of these patients the only MR abnormality was the presence of multiple parenchymal high-signal foci on T2-weighted images. Nine of the 14 had clinical evidence of multiple sclerosis; the remaining five had no clinical evidence of multiple sclerosis. Lesions in the auditory pathways, potentially responsible for the patients' symptoms, were identified in only five cases. We recommend T2-weighted images of the whole brain in addition to T1-weighted images of the internal auditory canals and cerebellopontine angles in patients with hearing loss. In some patients, lesions found at higher levels in the periventricular white matter may provide the only clue to the origin of auditory abnormalities.

Adult↗
PubMedDate not supplied

Audiological manifestations in "split brain" patients.

Traditional peripheral hearing tests (pure-tone thresholds, speech reception thresholds, and speech discrimination) and selected "central" hearing tests were administered to three commissurotomized patients. One patient was tested both pre-and postoperatively, whereas the remaining two were tested only postsurgery. Results indicated that commissurotomy had no apparent effects on performance on the peripheral tests. However, various tests in the central battery showed definite abnormal results. Most significant were the results from dichotically presented speech stimuli which repeatedly showed total absence of responses for stimuli presented to the left ear. Additional experimentation indicated this monaural deficit could be overcome by reducing the intensity level of right ear stimuli. Results for low-redundancy, monotically presented speech stimuli also indicated a left ear deficit; however, these results were not as consistent as the dichotic data.

Adolescent↗