Conclusions THOR data show that diagnoses related to work-related noise exposure (NIHL/tinnitus), as reported to THOR, remain important health problems, despite preventive measures being in place. (Source: Occupational Medicine)
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We describe the
CT and MRI findings of a rare case that had persistence of multiple emissary veins and presented clinically with tinnitus.
The radiological findings included a dilated left mastoid emissary vein, bilateral petrosquamosal sinuses, posterior condylar
veins, occipital emissary veins and an intrapetrous venule. The left petrosquamosal sinus had an unusual origin from the dilated
mastoid emissary vein. The patient also had major anomalies of posterior fossa venous sinuses which are discussed. A relevant
review of literature is included.
Content Type Journal ArticlePages 1-5DOI 10.1007/s00276-011-0822-xAuthors
Narvir Singh Chauhan, Department of Radiodiagnosis, Dr Rajendra Prasad Government Medical College-Tanda, Set No A3, Type IV Quarters, Kangra, Himachal Pradesh, …
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CONCLUSIONS:
Our results suggest that CT-guided blood patching targeting observed or potential leak sites can be effective in the treatment of intracranial hypotension. Prospective controlled studies are needed to confirm efficacy and compare outcomes with other treatment options. (Source: American Journal of Neuroradiology)
MedWorm: Tinnitus
Phantom perception refers to the conscious awareness of a percept in the absence of an external stimulus. On the basis of basic neuroscience on perception and clinical research in phantom pain and phantom sound, we propose a working model for their origin. Sensory deafferentation results in high-frequency, gamma band, synchronized neuronal activity in the sensory cortex. This activity becomes a conscious percept only if it is connected to larger coactivated â(self-)awarenessâ and âsalienceâ brain networks. Through the involvement of learning mechanisms, the phantom percept becomes associated to distress, which in turn is reflected by a simultaneously coactivated nonspecific distress network consisting of the anterior cingulate cortex, anterior insula, and amygdala. Memory mechanism…
MedWorm: Tinnitus
Researchers say they have found a biological explanation for tinnitus, a phantom ringing sound in the ears that affects up to 20% of the general population. (Source: WSJ.com: Health)
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Case history A 33-year-old man presented with sudden-onset unsteadiness, oscillopsia, nausea and vomiting, and left ear tinnitus and hearing loss. One month prior, he had developed lethargy and epigastric and thoracic back pain. Liver function tests were abnormal with a mixed hepatitic and obstructive picture. The nausea and vomiting settled, but 5 days after the development of the vestibulocochlear symptoms, he woke up with painful red eyes which resolved within 24 h. Over the following 2 weeks, the patient noticed a deterioration in hearing with probable complete loss in the left ear, a reduction in the right and bilateral tinnitus. He had no significant medical history and was taking no regular medications or recreational drugs. Examination indicated severe bilateral impa…
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Tinnitus has been associated with increased spontaneous and evoked activity, increased neural synchrony, and reorganization of tonotopic maps of auditory nuclei. However, the neurotransmitter systems mediating these changes are poorly understood. Here, we developed an in vitro assay that allows us to evaluate the roles of excitation and inhibition in determining the neural correlates of tinnitus. To measure the magnitude and spatial spread of evoked circuit activity, we used flavoprotein autofluorescence (FA) imaging, a metabolic indicator of neuronal activity. We measured FA responses after electrical stimulation of glutamatergic axons in slices containing the dorsal cochlear nucleus, an auditory brainstem nucleus hypothesized to be crucial in the triggering and modulation of tinnitus. FA…
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Updated Date: Apr 28, 2011 EST (Source: DailyMed Drug Label Updates for the last seven days (since May 20, 2007 EST))
MedWorm: Tinnitus
Audiol Neurotol 2012;17:2â11 (DOI:10.1159/000323847) (Source: Karger Publishers)
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