In Japan, Tokyo: Almost among ten dental patient, there will be a patient feel fear when hear the sound system of dental drill or aspirator. In the United States at the most recent neuroscience meeting, Japanese researchers presented new findings on ' during the treatment, when the patients feel anxiety how to react of the brain ' with new insights. Using functional magnetic resonance imaging, a neuroimaging measured by means of detection of brain activity, display a variety of dental equipment to use when sound when anxiety in patients with left caudate nucleus activity stronger. However, when issuing neutral sound like a horn or a pure tone, the activity of this region is significantly reduced. When the control group of patients without anxiety to hear the same sound of dental equipment, significant neural activity was not detected. Instead, the left and right auditory processing in patients with other neurological and associated temporal gyrus showed stronger activity. Researchers Karibe Hiroyuki from the Department of Pediatric Dentistry and Dental University in Japan presented " Recent studies have shown that the basal ganglia, including the caudate nucleus, may exercise the function of learning and memory, so subjects can fear from memory receiving the feedback sound treatment. "He said: Though not yet published his findings, but can still be used to assess the effectiveness of interventions in patients with dental fear to take, such as cognitive behavioral therapy. This study is the first to measure how the sound of dental drill associated with brain activity. It confirms the occurrence of major dental anxiety is a reason, rather than fear of dental treatment of pain.