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Audiol > Volume 2(1); 2006 > Article
Audiology 2006;2(1): 62-64.
Published online: June 30, 2006.
doi: http://dx.doi.org/10.21848/audiol.2006.2.1.62
Biotinylated Dextran Amine을 이용한 금화조 Song Control System의 뇌신경 회로 추적 - 신경망 연결과 Tonotopy
임덕환
한림대학교 언어청각학부 청각학전공, 청각언어연구소
Tracing Song Control System of the Zebra Finch with Biotinylated Dextran Amine - Neural Connection and Tonotopic Arrangement
Dukhwan Lim
Section of Audiology, Audiology and Speech Pathology Research Institute, Hallym University, Chuncheon, Korea
Correspondence  Dukhwan Lim ,Tel: (033) 248-2217, Fax: (02) 6280-9133, Email: dlim@hallym.ac.kr
Received: February 8, 2006;  Accepted: April 23, 2006.  Published online: June 30, 2006.
ABSTRACT
Auditory neural tracts were examined in the male zebra finch (Poephila guttata) to understand how the nuclei of the song control system connect each other to process complex auditory features. First, creysel violet and biotinylated dextran amine (BDA) were used as both anterograde and retrograde tracers. BDA tracer was injected in the HVc (N=3). After a survival time of 5 to 7 days, the brain of the animal was traced in both retrograde and anterograde directions. Second, subjects were stimulated with the pure tone of 1 kHz during the survival time to trace the tonotopy in Ov after the BDA tracer was injected in Field L (N=2). The results showed that dense neural connections between HVc and RA. Typical band shaped frequency regions were identified in Ov in response to 1 kHz pure tone stimulation in Field L injection. Based on these findings in anatomical tracing, sensory and motor subdivisions appeared to interact with each other and typical pure tone tonotopy was preserved at least up to the stage of Ov.
Key Words: Biotinylated dextran amine·Song control system·Zebra finch·Selectivity.
중심단어: Biotinylated dextran amine· Song control system· 금화조· 선택도.
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