상대적으로 언어적 의사소통 수단이 간단하고, 그 특성이 변하지 않으며, 짧은 언어적 critical period 때문에 금화조 (zebra finch, Poephila guttata)는 언어와 관련된 행동을 연구하는 여러 분야에서 유용한 모델의 하나로 주목을 받고 있다(Clayton et al., 2009; Keller & Hanloser, 2009). 이 금화조의 mating call을 조정하는 기능은 금화조 대뇌의 song control system으로 명칭된 여러 신경핵에서 처리가 된다(Nottebohm et al., 1976; Vicario & Yohay, 1993; Doupe, 1993).
\"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. KEY WORDS : biotinylated dextran amine (BDA), Field L, L2, HVc, selectivity, song control system, zebra finch.\"
\"INTRODUCTION MATERIALS AND METHODS RESULTS DISCUSSIONS AND CONCLUSIONS REFERENCES\"
