Evidence for the involvement of two areas of the zebra finch forebrain in sexual imprinting

Rollenhagen A, Bischof H-J (2000)
NEUROBIOLOGY OF LEARNING AND MEMORY 73(2): 101-113.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
Sexual imprinting in male zebra finches is a two-step process, including an acquisition period early in life and a stabilization process normally occuring during the first courtship attempts of the male. During the acquisition period, a young male learns about its social environment. During stabilization, which can be delayed experimentally until day 100, it develops a preference for the appropriate object for courtship behavior on the basis of its previous and acute experience. Thereafter, this preference cannot be altered again. Exploring the physiological basis for imprinting, we have previously shown that the neurons of two forebrain areas (ANC and HAD) increase their spine density in the course of the stabilization process, while in two other areas (MNH and LNH) a decrease of spine density can be observed. With the present experiments, we rested the idea that the spine density decrease in MNH and LNH is the anatomical manifestation of the imprinting process. Previous behavioral experiments have shown that exposure to a nestbox after 100 days of age stabilizes the sexual preference of a zebra finch male as well as does exposure to a female. The present study shows that nestbox exposure also reduces the spine density in MNH and LNH, but has no effect on ANC and HAD. It has also been shown previously that treating males with an antiandrogen between days 40 and 100 affects the final preference of a male. The present experiment indicates that the same treatment affects spine growth during development in MNH and LNH and prevents the increase of spine density within HAD and ANC normally induced by exposure to a female. The results are interpreted as strong evidence for the involvement of MNH and LNH in sexual imprinting. (C) 2000 Academic Press.
Stichworte
avian brain; testosterone; learning; cyproterone acetate; arousal; birds; spine density; Golgi
Erscheinungsjahr
2000
Zeitschriftentitel
NEUROBIOLOGY OF LEARNING AND MEMORY
Band
73
Ausgabe
2
Seite(n)
101-113
ISSN
1074-7427
Page URI
https://pub.uni-bielefeld.de/record/1619887

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Rollenhagen A, Bischof H-J. Evidence for the involvement of two areas of the zebra finch forebrain in sexual imprinting. NEUROBIOLOGY OF LEARNING AND MEMORY. 2000;73(2):101-113.
Rollenhagen, A., & Bischof, H. - J. (2000). Evidence for the involvement of two areas of the zebra finch forebrain in sexual imprinting. NEUROBIOLOGY OF LEARNING AND MEMORY, 73(2), 101-113. doi:10.1006/nlme.1999.3922
Rollenhagen, A., and Bischof, H. - J. (2000). Evidence for the involvement of two areas of the zebra finch forebrain in sexual imprinting. NEUROBIOLOGY OF LEARNING AND MEMORY 73, 101-113.
Rollenhagen, A., & Bischof, H.-J., 2000. Evidence for the involvement of two areas of the zebra finch forebrain in sexual imprinting. NEUROBIOLOGY OF LEARNING AND MEMORY, 73(2), p 101-113.
A. Rollenhagen and H.-J. Bischof, “Evidence for the involvement of two areas of the zebra finch forebrain in sexual imprinting”, NEUROBIOLOGY OF LEARNING AND MEMORY, vol. 73, 2000, pp. 101-113.
Rollenhagen, A., Bischof, H.-J.: Evidence for the involvement of two areas of the zebra finch forebrain in sexual imprinting. NEUROBIOLOGY OF LEARNING AND MEMORY. 73, 101-113 (2000).
Rollenhagen, A, and Bischof, Hans-Joachim. “Evidence for the involvement of two areas of the zebra finch forebrain in sexual imprinting”. NEUROBIOLOGY OF LEARNING AND MEMORY 73.2 (2000): 101-113.

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