Biotinylated dextran amine (BDA)를 응용한 금화조 song control 시스템의 간접 청각 입력 경로 분석 (Analysis of indirect auditory pathways to the song control system of the zebra finch with biotinylated dextran amine (BDA))

서지정보

· 발행기관 : 한국청각언어재활학회
· 수록지 정보 : Audiology and Speech Research / 7권 / 1호 / 60 ~ 63페이지
· 저자명 : 임덕환

초록

The zebra finch (Poephila guttata) has been known to have the nuclei of the song control system which contain highly selective neurons. They respond exclusively to a bird’s own song. The mechanism for this song selectivity is critical in understanding song-related behaviors such as vocal learning and memory. Though important advancement has been continued in this area, the exact nature of functional and anatomical correlates are still under investigation. In this retrospective study, local areas of field L, especially L2, were traced with a new modified application protocol of biotinylated dextran amine (BDA) to examine how general auditory inputs were anatomically connected to the song control system (HVc, hyperstriatum ventral pars caudalis) in the forebrain of the adult male zebra finch. The injection of BDA tracer was controlled to be confined within the L2 area (N=3) and connections were traced in both retrograde and anterograde directions. The data confirmed that Field L2 area provided the input to the shelf area of the HVc instead of direct connections to the HVc proper. Thus, song selectivity appeared to be achieved indirectly with the addition of at least one more processing stage (shelf) between L2 and HVc.

영어초록

The zebra finch (Poephila guttata) has been known to have the nuclei of the song control system which contain highly selective neurons. They respond exclusively to a bird’s own song. The mechanism for this song selectivity is critical in understanding song-related behaviors such as vocal learning and memory. Though important advancement has been continued in this area, the exact nature of functional and anatomical correlates are still under investigation. In this retrospective study, local areas of field L, especially L2, were traced with a new modified application protocol of biotinylated dextran amine (BDA) to examine how general auditory inputs were anatomically connected to the song control system (HVc, hyperstriatum ventral pars caudalis) in the forebrain of the adult male zebra finch. The injection of BDA tracer was controlled to be confined within the L2 area (N=3) and connections were traced in both retrograde and anterograde directions. The data confirmed that Field L2 area provided the input to the shelf area of the HVc instead of direct connections to the HVc proper. Thus, song selectivity appeared to be achieved indirectly with the addition of at least one more processing stage (shelf) between L2 and HVc.

참고자료

· 없음