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Dendritic spine loss and enlargement during maturation of the speech control system in the mynah bird (gracula religiosa)

1982; Elsevier BV; Volume: 29; Issue: 2 Linguagem: Inglês

10.1016/0304-3940(82)90341-x

1872-7972

G. Rausch, Henning Scheich,

Animal Behavior and Reproduction

Three types of neurons were identified in Golgi-Cox preparations of the telencephalic nucleus HVc of the mynah bird with the Sholl method. In a comparison of birds of 10 weeks and speech-trained birds of one year of age a reduction of dendritic spine density and an enlargement of the remaining spines was found in a large isopolar cell type. These findings are interpreted in terms of the mynah's shrinking potential with age to imitate new sounds and the stabilization of the acquired repertoire.