auditory

听觉
  • 文章类型: Journal Article
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  • 文章类型: Journal Article
    UNASSIGNED: Type two diabetes mellitus may relate to auditory and vestibular dysfunction. This relationship was frequently observed in elders. The present study aimed to evaluate the auditory and vestibular function of diabetic patients and compare the results with those of a healthy adult control group.
    UNASSIGNED: Patients were asked to complete demographic characteristics form. Moreover, fasting blood sugar, as well as hemoglobin A1C tests, were carried out on them. Both the patients and control group were evaluated using several auditory and vestibular tests including Pure Tone Audiometry (PTA), video Head Impulse Test (v-HIT), ocular Vestibular Evoked Myogenic Potential (o-VEMP), and cervical Vestibular Evoked Myogenic Potential (c-VEMP).
    UNASSIGNED: The PTA showed a significant difference in some frequencies between the two groups. These differences were minimal in lower frequencies and become greater at 8000Hz. The v-HIT was abnormal for some patients and also showed a significant difference between the two groups. The o-VEMP and c-VEMP results were normal in most patients.
    UNASSIGNED: Based on the obtained results, auditory and vestibular dysfunctions are related to Diabetes. Patients with type two diabetes mellitus showed mild auditory and vestibular dysfunctions compared to the healthy control group.
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  • 文章类型: Case Reports
    BACKGROUND: Musical hallucinations are a particular type of auditory hallucination in which the patient perceives instrumental music, musical sounds, or songs. Musical hallucinations are associated with acquired hearing loss, particularly within the elderly. Under conditions of reduced auditory sensory input, perception-bearing circuits are disinhibited and perceptual traces released, implying an interaction between peripheral sensory deficits and central factors related to brain dysfunction.
    METHODS: A 71-year-old Caucasian man with hearing loss complained of memory difficulties and resting tremor of the right upper limb in the previous 2 years. He already had difficulties in instrumental activities of daily life. Neurological examination showed Parkinsonian signs and hypoacusia. Neuropsychological examination identified deficits in executive functions and memory tests. Brain computerized tomography and nuclear magnetic resonance scans showed mild cortical and subcortical atrophy. The clinical diagnosis of possible dementia with Lewy bodies was established. Five years later, the patient began complaining of musical hallucinations. There had been no previous change in medication. An otorhinolaryngologist diagnosed age-related hearing loss and prescribed bilateral hearing aids. After using the hearing aids, the patient did not hear the songs any longer, only some tinnitus, described as a whistle. However, at the same time, the patient started experiencing visual hallucinations he never had before.
    CONCLUSIONS: To our knowledge, the immediate shift of hallucinations from one sensory modality to another sensory modality when perception is improved has not been previously described. This report emphasizes the interaction between brain pathology and sensory deficits for the genesis of hallucinations, and reinforces the theory that attention and control networks must couple properly to the default mode network, as well as integrate and select adequately peripheral signals to the somatosensory cortices, in order to keep a clear state of mind.
    CONCLUSIONS: The clinician should bear in mind and let the patient know that improving one sensory modality to ameliorate hallucinations may sometimes paradoxically lead to hallucinations in a different sensory modality.
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  • 文章类型: Journal Article
    In five people with severe dementia, we measured their behavioral and physiological responses to familiar/unfamiliar music and speech, and measured ERP responses to subject\'s own name (SON) after exposure to familiar/unfamiliar music or noise. We observed more frequent behavioral responses to personally-significant stimuli than non-personally-significant stumuli, and higher skin temperatures for music than non-music conditions. The control group showed typical ERPs to SON, regardless of auditory exposure. ERP measures were unavailable for the dementia group given challenges of measuring EEG in this population. The study highlights the potential for personally-significant auditory stimuli in enhancing responsiveness of people with severe dementia.
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  • 文章类型: Journal Article
    We provide a preliminary case study in red-bellied lemurs (Eulemur rubriventer) to illustrate a multimodal approach to understanding communication strategies within a species with obligate pair-bonds. From June to August 2012, we observed and analyzed signaling behaviors across three established red-bellied lemur pairs at Duke Lemur Center (Durham, NC, USA). Our aim was to assess how individuals combine signal modalities to communicate with pair-mates, and to determine whether these strategies vary by time of day, sex, or pair. We analyzed rates of occurrence of touch (allogrooming, mutual grooming, physical contact, and huddling), scent (scent marking and allomarking), and sound (close-distance contact calls) using Wilcoxon rank sum and exact binomial tests. Time of day impacted rates of occurrence across signal modalities, with higher rates of combined signaling within each modality occurring earlier in the day (p < 0.03). Across time periods, all pairs used auditory signals most frequently, followed by olfactory signals, and finally tactile and tactile-olfactory signals (p < 0.01, all comparisons). In fact, auditory signals frequently overlapped the olfactory signaling modality, and travel rarely occurred without accompanying vocalizations. However, red-bellied lemurs spent the highest percentage of their observed time in tactile signaling bouts (on average, 19.5% of total observed time across pairs). Males and females participated equally in most signaling behaviors (p > 0.1), with the exception of scent marking, which males used more frequently (p < 0.01). The results of this study will aid in developing methods and hypotheses to determine how wild red-bellied lemurs communicate to form, maintain, and advertise their pair-bonds.
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  • 文章类型: Journal Article
    Risk warning or disclosure information in advertising is only effective in correcting consumers\' judgments if enough cognitive capacity is available to process that information. Hence, comprehension of verbal warnings in TV commercials may suffer if accompanied by positive visual elements. This research addresses this concern about cross-modality interference in the context of direct-to-consumer (DTC) pharmaceutical commercials in the United States by experimentally testing whether positive facial expressions reduce consumers\' understanding of the mandated health warning. A content analysis of a sample of DTC commercials reveals that positive facial expressions are more prevalent during the verbal warning act of the commercials than during the other acts. An eye-tracking experiment conducted with specially produced DTC commercials, which vary the valence of characters\' facial expressions during the health warning, provides evidence that happy faces reduce objective comprehension of the warning.
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  • 文章类型: Case Reports
    背景:感觉神经性听力损失是一种公认的隐球菌性脑膜炎的并发症。隐球菌性脑膜炎患者的听力损失机制不同于细菌性脑膜炎。
    方法:一名免疫能干的隐球菌性脑膜炎患者突然发作,双边,严重至严重的感觉神经性听力损失和前庭功能障碍。他最初被评估为人工耳蜗植入。然而,他有一个显著的恢复;他不再需要手术,能够应付没有助听器。
    结论:通常,人工耳蜗植入在细菌性脑膜炎后听力损失患者中具有一定的紧迫性,因为骨化性迷路炎的风险。然而,该过程尚未在隐球菌性脑膜炎患者中描述。此外,与隐球菌性脑膜炎相关的听力损失患者表现出不同程度的可逆性.在这个案例报告中,将隐球菌性脑膜炎的听力损失与细菌性脑膜炎的听力损失进行比较,讨论了隐球菌性脑膜炎患者是否需要人工耳蜗植入。
    BACKGROUND: Sensorineural hearing loss is a recognised complication of cryptococcal meningitis. The mechanism of hearing loss in patients with cryptococcal meningitis is different from that in bacterial meningitis.
    METHODS: An immune-competent man with cryptococcal meningitis presented with sudden onset, bilateral, severe to profound sensorineural hearing loss and vestibular dysfunction. He was initially evaluated for cochlear implantation. However, he had a significant recovery; he no longer required surgery and was able to cope without a hearing aid.
    CONCLUSIONS: Typically, cochlear implantation is performed with some urgency in patients with hearing loss post-bacterial meningitis, because of the risk of labyrinthitis ossificans. However, this process has not been described in patients with cryptococcal meningitis. Furthermore, patients with hearing loss associated with cryptococcal meningitis have shown varying degrees of reversibility. In this case report, hearing loss from cryptococcal meningitis is compared with that from bacterial meningitis, and the need for cochlear implantation in patients with cryptococcal meningitis is discussed.
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  • 文章类型: Journal Article
    OBJECTIVE: The objective of this review is to describe auditory hallucinations (paracusias) associated with migraine attacks to yield insights into their clinical significance and pathogenesis.
    BACKGROUND: Isolated observations have documented rare associations of migraine with auditory hallucinations. Unlike visual, somatosensory, language, motor, and brainstem symptoms, paracusias with acute headache attacks are not a recognized aura symptom by the International Headache Society, and no systematic review has addressed this association.
    METHODS: We retrospectively studied patients experiencing paracusias associated with migraine at our center and in the literature.
    RESULTS: We encountered 12 patients (our center = 5, literature = 7), 58% were female, and 75% had typical migraine aura. Hallucinations most commonly featured voices (58%), 75% experienced them during headache, and the duration was most often <1 hour (67%). No patients described visual aura evolving to paracusias. Most patients (50%) had either a current or previous psychiatric disorder, most commonly depression (67%). The course of headache and paracusias were universally congruent, including improvement with headache prophylaxis (58%).
    CONCLUSIONS: Paracusias uncommonly co-occur with migraine and usually feature human voices. Their timing and high prevalence in patients with depression may suggest that paracusias are not necessarily a form of migraine aura, though could be a migraine trait symptom. Alternative mechanisms include perfusion changes in primary auditory cortex, serotonin-related ictal perceptual changes, or a release phenomenon in the setting of phonophobia with avoidance of a noisy environment.
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