| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
The neural activities for the sounds with interaural time differences and interaural level differences were recorded in the inferior colliculus (IC) of chicken. There were various space coding neurons and I found that the integration were occurred among the different characteristic frequencies in IC. Furthermore, there was non-space coding neurons. These neurons were activated or inhibited by the various sound frequencies in the complex manner and seems to code the sound quality. Furthermore, I found that the characteristic frequencies that project to the NL (nucleus laminaris) neuron was different between the ipsilateral side and contralateral side. These differences in characteristic frequency enable to make the 0 us best ITD and the wide range distribution of best ITDs in NL neurons. The interaural time difference was calculated not only by the delay line but also the delay in the cochlear.
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