Birth, migration, incorporation, and death of vocal control neurons in adult songbirds

Journal of Neurobiology

Volumn 33, Issue 5, 1997, Pages 585-601

  Alvarez Buylla, Arturo ^a   Kirn, John R ^b  

^a ROCKEFELLER UNIVERSITY   (United States)

^b WESLEYAN UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

BEHAVIOR; BIRD; BIRTH; BRAIN FUNCTION; CELL DEATH; CONTROL SYSTEM; LATERAL BRAIN VENTRICLE; MIGRATION; NERVOUS SYSTEM DEVELOPMENT; NONHUMAN; PRIORITY JOURNAL; REVIEW; SEASONAL VARIATION; TURNOVER TIME; VOCALIZATION;

ANIMALS; BIRDS; BRAIN; CELL DEATH; CELL MOVEMENT; FEMALE; MALE; NEURONS; VOCALIZATION, ANIMAL;

EID: 0030701610     PISSN: 00223034     EISSN: None     Source Type: Journal    
DOI: 10.1002/(SICI)1097-4695(19971105)33:5<585::AID-NEU7>3.0.CO;2-0     Document Type: Review

References (125)

1. ALTMAN, J. (1970). Postnatal neurogenesis and the problem of neural plasticity. In: Developmental Neurobiology. Himwich, W. A., Ed. C. C. Thomas, Springfield, IL.
2. ALVAREZ-BUYLLA, A., BUSKIRK, D. R., and NOTTEBOHM, F. (1987). Monoclonal antibody reveals radial glia in adult avian brain. J. Comp. Neurol. 264:159-170.
3. ALVAREZ-BUYLLA, A., KIRN, J. R., and NOTTEBOHM, F. (1990). Birth of projection neurons in adult avian brain may be related to perceptual or motor learning. Science 249:1444-1446.
4. ALVAREZ-BUYLLA, A., LING, C.-Y., and NOTTEBOHM, F. (1992). High vocal center growth and its relation to neurogenesis, neuronal replacement and song acquisition in juvenile canaries. J. Neurobiol. 23:396-406.
5. ALVAREZ-BUYLLA, A., LING, C.-Y., and Yu, W. S. (1994). Contribution of neurons born during embryonic, juvenile, and adult life to the brain of adult canaries: regional specificity and delayed birth of neurons in the song-control nuclei. J. Comp. Neurol. 347:233-248.
6. ALVAREZ-BUYLLA, A. and NOTTEBOHM, F. (1988). Migration of young neurons in adult avian brain. Nature 335:353-354.
7. ALVAREZ-BUYLLA, A., THEELEN, M., and NOTTEBOHM, F. (1988a). Birth of projection neurons in the higher vocal center of the canary forebrain before, during, and after song learning. Proc. Natl. Acad. Sci. USA 85:8722-8726.
8. ALVAREZ-BUYLLA, A., THEELEN, M., and NOTTEBOHM, F. (1988b). Mapping of radial glia and of a new cell type in adult canary brain. J. Neurosci. 8:2707-2712.
9. ALVAREZ-BUYLLA, A., THEELEN, M., and NOTTEBOHM, F. (1990). Proliferation "hot spots" in adult avian ventricular zone reveal radial cell division. Neuron 5:101-109.
10. ARAI, O. and SAITO, N. (1995). Thyroxine reduces the production rate of BrdU-labeled cells in the ventricular zone of the adult canary brain. Neurosci. Lett. 198:135-138.
11. ARNOLD, A. P. (1992). Developmental plasticity in neural circuits controlling birdsong: sexual differentiation and the neural basis of learning. J. Neurobiol. 23:1506-1528.
12. ARNOLD, A. P. (1997). Sexual differentiation of the zebra finch song system: positive evidence, negative evidence, null hypotheses, and a paradigm shift. J. Neurobiol. 33:572-584.
13. ARNOLD, A. P., NOTTEBOHM, F., and PFAFF, D. W. (1976). Hormone concentrating cells in vocal control and other areas of the brain of the zebra finch (Poephila guttata). J. Comp. Neurol. 165:487-511.
14. ARNOLD, A. P., WADE, J., GRISHAM, W., JACOBS, E. C., and CAMPAGNONI, A. T. (1996). Sexual differentiation of the brain in songbirds. Dev. Neurosci. 18:124-136.
15. BALTHAZART, J., FOIDART, A., WILSON, E. M., and BALL, G. F. (1992). Immunocytochemical localization of androgen receptors in the male songbird and quail brain. J. Comp. Neurol. 317:407-420.
16. BARAMI, K., IVERSEN, K., FURNEAUX, H., and GOLDMAN, S. A. (1995). Hu protein as an early marker of neuronal phenotypic differentiation by subependymal zone cells of the adult songbird forebrain. J. Neurobiol. 28:82-101.
17. BARAMI, K., KIRSCHENBAUM, B., LEMMON, V., and GOLDMAN, S. A. (1994). N-cadherin and Ng-CAM/8D9 are involved serially in the migration of newly generated neurons into the adult songbird brain. Neuron 13:567-582.
18. BARNEA, A. and NOTTEBOHM, F. (1994). Seasonal recruitment of hippocampal neurons in adult free-ranging black-capped chickadees. Proc. Natl. Acad. Sci. USA 91:11217-11221.
19. BARNEA, A. and NOTTEBOHM, F. (1996). Recruitment and replacement of hippocampal neurons in young and adult chickadees: an addition to the theory of hippocampal learning. Proc. Natl. Acad. Sci. USA 93:714-718.
20. BAYER, S. A. (1983). 3H-Thymidine-radigraphic studies of neurogenesis in the rat olfactory bulb. Exp. Brain Res. 50:329-340.
21. BIRSE, S. C., LEONARD, R. B., and COGGESHALL, R. E. (1980). Neuronal increase in various areas of the nervous system of the guppy, Lebistes. J. Comp. Neurol. 194:291-301.
22. BOTTJER, S.W. and DIGNAN, T. P. (1988). Joint hormonal and sensory stimulation modulate neuronal number in adult canary brain. J. Neurobiol. 19:624-635.
23. BOTTJER, S. W., GLAESSNER, S. L., and ARNOLD, A. P. (1985). Ontogeny of brain nuclei controlling song learning and behavior in zebra finches. J. Neurosci. 5:1556-1562.
24. BOTTJER, S. W., HALSEMA, K. A., BROWN, S. A., and MIESNER, E. A. (1989). Axonal connections of a forebrain nucleus involved with vocal learning in zebra finches. J. Comp. Neurol. 279:312-326.
25. BOTTJER, S. W. and HEWER, S. J. (1992). Castration and antisteroid treatment impair vocal learning in male zebra finches. J. Neurobiol. 23:337-353.
26. BOTTJER, S. W. and JOHNSON, F. (1997). Circuits, hormones, and learning: vocal behavior in songbirds. J. Neurobiol. 33:602-618.
27. BOTTJER, S. W. and MAIER, E. (1991). Testosterone and the incidence of hormone target cells in song-control nuclei of adult canaries. J. Neurobiol. 22:512-521.
28. BOTTJER, S. W., MIESNER, E. A., and ARNOLD, A. P. (1984). Forebrain lesions disrupt development but not maintenance of song in passerine birds. Science 224:901-902.
29. BOTTJER, S. W., SCHOONMAKER, J. N., and ARNOLD, A. P. (1986). Auditory and hormonal stimulation interact to produce neuronal growth in adult canaries. J. Neurobiol. 17:605-612.
30. BREEDLOVE, S. M. (1992). Sexual dimorphism in the vertebrate nervous system. J. Neurosci. 12:4133-4142.
31. BRENOWITZ, E. A. (1991). Altered perception of species-specific song by female birds after lesions of a forebrain nucleus. Science 251:303-305.
32. BRENOWITZ, E. A. (1997). Comparative approaches to the avian song system. J. Neurobiol. 33:517-531.
33. BRENOWITZ, E. A. and ARNOLD, A. P. (1986). Interspecific comparisons of the size of neural song control regions and song complexity in duetting birds: evolutionary implications. J. Neurosci. 6:2875-2879.
34. BRENOWITZ, E. A. and ARNOLD, A. P. (1992). Hormone accumulation in song regions of the canary brain. J. Neurobiol. 23:871-880.
35. BRENOWITZ, E. A., MARGOLIASH, D., and NORDEEN, K. W. (1997). Introduction to birdsong and the avian song system. J. Neurobiol. 33:495-500.
36. BRENOWITZ, E. A., NALLS, B., WINGFIELD, J. C., and KROODSMA, D. E. (1991). Seasonal changes in avian song nuclei without seasonal changes in song repertoire. J. Neurosci. 8:3770-3784.
37. BROWN, S. D., JOHNSON, F., and BOTTJER, S. W. (1993). Neurogenesis in adult canary telencephalon is independent of gonadal hormone levels. J. Neurosci. 13:2024-2032.
38. BURD, G. D. and NOTTEBOHM, F. (1985). Ultrastructural characterization of synaptic terminals formed on newly generated neurons in a song control nucleus of the adult canary forebrain. J. Comp. Neurol. 240:143-152.
39. BUREK, M. J., NORDEEN, K. W., and NORDEEN, E. J. (1991). Neuron loss and addition in developing zebra finch song nuclei are independent of auditory experience during song learning. J. Neurobiol. 22:215-223.
40. BUREK, M. J., NORDEEN, K. W., and NORDEEN, E. J. (1995). Estrogen promotes neuron addition to an avian song-control nucleus by regulating post-mitotic events. Dev. Brain Res. 85:220-224.
41. CASSONE, V. M. (1990). Melatonin: time in a bottle. In: Oxford Reviews of Reproductive Biology, Vol. 12. Milligan, S. R., Ed. Oxford University Press, New York, pp. 319-367.
42. CLAYTON, N. S. and KREBS, J. R. (1994). Hippocampal growth and attrition in birds affected by experience. Proc. Natl. Acad. Sci. USA 91:7410-7414.
43. COWAN, W. M., FAWCETT, J. W., O'LEARY, D. D. M., and STANFIELD, B. B. (1984). Regressive events in neurogenesis. Science 225:1258-1265.
44. DELLOVADE, T. L., ZHU, Y. S., KREY, L., and PFAFF, D. W. (1996). Thyroid hormone and estrogen interact to regulate behavior. Proc. Natl. Acad. Sci. USA 93:12581-12586.
45. DEVOOGD, T. J., KREBS, J. R., HEALY, S. D., and PURVIS, A. (1993). Relations between song repertoire size and the volume of brain nuclei related to song : comparative evolutionary analyses amongst oscine birds. Royal Soc. 254:75-82.
46. DEVOOGD, T. J., NIXDORF, B., and NOTTEBOHM, F. (1985). Synaptogenesis and changes in synaptic morphology related to acquisition of a new behavior. Brain. Res. 329:304-308.
47. DEVOOGD, T. J. and NOTTEBOHM, F. (1981). Gonadal hormones induce dendritic growth in the adult brain. Science 214:202-204.
48. DOUPE, A. J. and KONISHI, M. (1991). Song-selective auditory circuits in the vocal control system of the zebra finch. Proc. Natl. Acad. Sci. USA 88:11339-11343.
49. EASTER, S. S. (1983). Postnatal neurogenesis and changing connections. Trends Neurosci. 6:53-56.
50. EVANS, B. I. and FERNALD, R. D. (1990). Metamorphosis and fish vision. J. Neurobiol. 21:1037-1052.
51. GAHR, M. (1990a). Delineation of a brain nucleus: comparisons of cytochemical, hodological, and cytoarchitectural views of the song control nucleus HVC of the adult canary. J. Comp. Neurol. 294:30-36.
52. GAHR, M. (1990b). Localization of androgen receptors and estrogen receptors in the same cells of the songbird brain. Proc. Natl. Acad. Sci. USA 87:9445-9448.
53. GAHR, M., FLUGGE, G., and GUTTINGER, H-R. (1987). Immunocytochemical localization of estrogen-binding neurons in the songbird brain. Brain Res. 402:173-177.
54. GAHR, M. and GARCIA-SEGURA, L. M. (1996). Testosterone-dependent increase of gap-junctions in HVC neurons of adult female canaries. Brain Res. 712:69-73.
55. GAHR, M. and KOSAR, E. (1996). Identification, distribution, and developmental changes of a melatonin binding site in the song control system of the zebra finch. J. Comp. Neurol. 367:308-318.
56. GARCIA-VERDUGO, J. M., LLAHI, S., FERRER, I., and LOPEZ-GARCIA, C. (1989). Postnatal neurogenesis in the olfactory bulbs of a lizard: a tritiated thymidine autoradiographic study. Neurosci. Lett. 98:247-252.
57. GOLDMAN, S. A., ZUKHAR, A., BARAMI, K., MIKAWA, T., and NIEDZWIECKI, D. (1996). Ependymal/subependymal zone cells of postnatal and adult songbird brain generate both neurons and nonneuronal siblings in vitro and in vivo. J. Neurobiol. 30:505-520.
58. GOLDMAN, S. A. and NOTTEBOHM, F. (1983). Neuronal production, migration, and differentiation in a vocal control nucleus of the adult female canary brain. Proc. Natl. Acad. Sci. USA 80:2390-2394.
59. GOULD, E. and CAMERON, H. A. (1996). Regulation of neuronal birth, migration and death in the rat dentate gyrus. Dev. Neurosci. 18:22-35.
60. GRAY, G. E. and SANES, J. R. (1992). Lineage of radial glia in the chicken optic tectum. Development 114:271-283.
61. GROSCOLAS, R. and LELOUP, J. (1986). The endocrine control of reproduction and molt in male and female emporer (Apdenodytes forsteri) and adelie (Pygoscelis adeliae) penguins. II. Annual changes in plasma levels of thyroxine and triiodthyronine. Gen. Comp. Endocrinol. 63:264-274.
62. HAMBURGER, V. (1984). The effects of wing bud extirpation on the development of the central nervous system in chick embryos. J. Exp. Zool. 68:449-494.
63. HIDALGO, A., BARAMI, K., IVERSEN, K., and GOLDMAN, S. A. (1995). Estrogens and non-estrogenic ovarian influences combine to promote the recruitment and decrease the turnover of new neurons in the adult female canary brain. J. Neurobiol. 27:470-487.
64. HILL, K. M. and DEVOOGD, T. J. (1991). Altered daylength affects dendritic structure in a song-related brain region in red-winged blackbirds. Behav. Neural Biol. 56:240-250.
65. HOLZENBERGER, M., JARVIS, E. D., CHONG, C., GROSSMAN, M., NOTTEBOHM, F., SCHARFF, C. Selective expression of insulin-like growth factors II in the song-bird brain. J. Neurosci. (in press).
66. IMMELMANN, K. (1969). Song development in the zebra finch and other Estrildid finches. In: Bird Vocalizations. Hinde, R. A., Ed. Cambridge University Press, London, pp. 61-74.
67. JACOBSON, M. (1991). Developmental Neurobiology, 3rd ed. Plenum Press, New York.
68. JALLAGEAS, M., TAMISIER, A., and ASSENMACHER, I. (1978). A comparative study of the annual cycles in sexual and thyroid function in male peking ducks (Anas platyrhynchos) and teal (Anas crecca). Gen. Comp. Endocrinol. 36:201-210.
69. JOHNSON, F. and BOTTJER, S. W. (1995). Differential estrogen accumulation among populations of projection neurons in the high vocal center of male canaries. J. Neurobiol. 26:87-108.
70. JOHNSON, F., HOHMANN, S. E., DISTEFANO, P. S., and BOTTJER, S. W. (1997). Neurotrophins suppress apoptosis induced by deafferentation of an avian motor-cortical region. J. Neurosci. 17:2101-2111.
71. KAPLAN, M. S. and HINDS, J. W. (1977). Neurogenesis in the adult rat: electron microscopic analysis of light radioautographs. Science 197:1092-1094.
72. KIRN, J. R., ALVAREZ-BUYLLA, A., and NOTTEBOHM, F. (1991). Production and survival of projection neurons in the high vocal center of adult male canaries. J. Neurosci. 11:1756-1762.
73. KIRN, J. R. and DEVOOGD, T. J. (1989). Genesis and death of vocal control neurons during sexual differentiation in the zebra finch. J. Neurosci. 9:3176-3187.
74. KIRN, J. R. and NOTTEBOHM, F. (1993). Direct evidence for loss and replacement of projection neurons in adult canary brain. J. Neurosci. 13:1654-1663.
75. KIRN, J. R., O'LOUGHLIN, B., KASPARIAN, S., and NOTTEBOHM, F. (1994). Cell death and neuronal recruitment in the high vocal center of adult male canaries are temporally related to changes in song. Proc. Natl. Acad. Sci. USA 91:7844-7848.
76. KIRN, J. R. and SCHWABL, H. (In press). Photoperiod regulation of neuron death in adult canary. J. Neurobiol.
77. KONISHI, M. (1985). Birdsong: from behavior to neuron. Ann. Rev. Neurosci. 8:125-170.
78. KONISHI, M. and AKUTAGAWA, E. (1985). Neuronal growth, atrophy and death in a sexually dimorphic song nucleus in the zebra finch brain. Nature 315:145-147.
79. KONISHI, M. and AKUTAGAWA, E. (1990). Growth and atrophy of neurons labeled at their birth in a song nucleus of the zebra finch. Proc. Natl. Acad. Sci. USA 87:3538-3541.
80. KORSIA, S. and BOTTJER, S. W. (1991). Chronic testosterone treatment impairs vocal learning in male zebra finches during a restricted period of development. J. Neurosci. 11:2362-2371.
81. KURZ, E. M., SENGELAUB, D. R., and ARNOLD, A. P. (1986). Androgens regulate the dendritic length of mammalian motoneurons in adulthood. Science 232:395-398.
82. LE DOUARIN, N. M., SMITH, J., TEILLET, M-A., LE LIEVRE, C. S. and ZILLER, C. (1980). The neural crest and its developmental analysis in avian embryo chimeras. Trends Neurosci. February:39-42.
83. LEVI-MONTALCINI, R. (1987). The nerve growth factor 35 years later. Science 237:1154-1162.
84. LING, C., ZUO, M., ALVAREZ-BUYLLA, A., and CHENG, M. (1997). Neurogenesis in juvenile and adult ring doves. J. Comp. Neurol. 379:300-312.
85. LOIS, C. and ALVAREZ-BUYLLA, A. (1994). Long-distance neuronal migration in the adult mammalian brain. Science 264:1145-1148.
86. LOPEZ-GARCIA, C., MOLOWNY, A., GARCIA-VERDUGO, J. M., and FERRER, I. (1988). Delayed postnatal neurogenesis in the cerebral cortex of lizards. Dev. Brain Res. 43:167-174.
87. LOPEZ-GARCIA, C., TINEO, P. L., and DEL CORRAL, J. (1984). Increase of the neuron number in some cerebral cortical areas of a lizard Podarcis hispanica, (Steind, 1870), during postnatal periods of life. J. Hirnforsch. 3:255-259.
88. MACLUSKY, N. J. and NAFTOLIN, F. (1981) Sexual differentiation of the central nervous system. Science 211:1294-1303.
89. MADEIRA, M. D., CADETE-LEITE, A., ANDRADE, J. P., and PAULA-BARBOSA, M. M. (1991). Effects of hypothyroidism upon the granular layer of the dentate gyrus in male and female adult rats: a morphometric study. J. Comp. Neurol. 314:171-186.
90. MARLER, P., PETERS, S., BALL, G. F., DUFTY, A. M., JR., and WINGFIELD, J. C. (1988). The role of sex steroids in the acquisition and production of birdsong. Nature 336:770-772.
91. MCEWEN, B. S. (1981). Neural gonadal steroid actions. Science 211:1301-1311.
92. NORDEEN, E. J. and NORDEEN, K. W. (1988). Sex and regional differences in the incorporation of neurons born during song learning in zebra finches. J. Neurosci. 8:2869-2874.
93. NORDEEN, E. J., NORDEEN, K. W., and ARNOLD, A. P. (1987). Sexual differentiation of androgen accumulation within the zebra finch brain through selective cell loss and addition. J. Comp. Neurol. 259:393-399.
94. NORDEEN, K. W. and NORDEEN, E. J. (1988). Projection neurons within a vocal motor pathway are born during song learning in zebra finches. Nature 334:149-151.
95. NORDEEN, K. W. and NORDEEN, E. J. (1992). Auditory feedback is necessary for the maintenance of stereotyped song in adult zebra finches. Behav. Neural Biol. 57:58-66.
96. NORDEEN, K. W. and NORDEEN, E. J. (1997). Anatomical and synaptic substrates for avian song learning. J. Neurobiol. 33:532-548.
97. NOTTEBOHM, F. (1989). From bird song to neurogenesis. Sci. Am. 260:74-79.
98. NOTTEBOHM, F. (1985). Neuronal replacement in adulthood. In: Hope for a New Neurology. Nottebohm, F., Ed. New York Academy of Sciences, New York, pp. 143-161.
99. NOTTEBOHM, F. (1993). The search for neural mechanisms that define the sensitive period for song learning in birds. Neth. J. Zool. 43:193-234.
100. NOTTEBOHM, F., ALVAREZ-BUYLLA, A., CYNX, J., KIRN, J., LING, C.-Y., NOTTEBOHM, M. E., SUTER, R., TOLLES, A., and WILLIAMS, H. (1990). Song learning in birds: the relation between perception and production. Phil. Trans. R. Soc. Lond. B 329:115-124.
101. NOTTEBOHM, F., NOTTEBOHM, M. E., CRANE, L. A., and WINGFIELD, J. C. (1987). Seasonal changes in gonadal hormone levels of adult male canaries and their relation to song. Behav. Neural Biol. 47:197-211.
102. NOTTEBOHM, F., O'LOUGHLIN, B., GOULD, K., YOHAY, K., and ALVAREZ-BUYLLA, A. (1994). The life span of new neurons in a song control nucleus of the adult canary brain depends on time of year when these cells are born. Proc. Natl. Acad. Sci. USA 91:7849-7853.
103. NOTTEBOHM, F., STOKES, T. M., and LEONARD, C. M. (1976). Central control of song in the canary, Serinus canaria. J. Comp. Neurol. 165:457-486.
104. OPPENHEIM, R. W. (1989). The neurotrophic theory and naturally occurring motoneuron death. Trends Neurosci. 12:252-255.
105. PATON, J. A., BURD, G. D., and NOTTEBOHM, F. (1986). New neurons in an adult brain: plasticity in an auditory-motor nucleus. In: The Biology of Change in Otolaryngology. Ruben, R. W., et al., Eds. Elsevier Biomedical, Amsterdam, pp. 201-210.
106. PATON, J. A. and NOTTEBOHM, F. (1984). Neurons generated in the adult brain are recruited into functional circuits. Science 225:1046-1048.
107. PATON, J. A., O'LOUGHLIN, B. E., and NOTTEBOHM, F. (1985). Cells born in adult canary forebrain are local interneurons. J. Neurosci. 5:3088-3093.
108. RAKIC, P. (1990). Principles of neural cell migration. Experientia 46:882-891.
109. RASIKA, S., NOTTEBOHM, F., and ALVAREZ-BUYLLA, A. (1994). Testosterone increases the recruitment and/or survival of new high vocal center neurons in adult female canaries. Proc. Natl. Acad. Sci. USA 91:7854-7858.
110. REINER, A., BRAUTH, S. E., and KARTEN, H. J. (1984). Evolution of the amniote basal ganglia. Trends Neurosci. 7:320-325.
111. SCHARFF, C., KIRN, J. R., MACKLIS, J. D., and NOTTEBOHM, F. (1994). Effects of area X lesions on HVC and selective laser photolysis of the HVC-to-area X projecting neurons. Soc. Neurosci. Abstr. 74.6.
112. SCHARFF, C. and NOTTEBOHM, F. (1991). A comparative study of the behavioral deficits following lesions of various parts of the zebra finch song system: implications for vocal learning. J. Neurosci. 11:2896-2913.
113. SCHLINGER, B. A. (1997). Sex steroids and their actions on the birdsong system. J. Neurobiol. 33:619-631.
114. SHEEN, V. L. and MACKLIS, J. D. (1995). Targeted neocortical cell death in adult mice guides migration and differentiation of transplanted embryonic neurons. J. Neurosci. 15:8378-8392.
115. SIMPSON, H. B. and VICARIO, D. S. (1990). Brain pathways for learned and unlearned vocalizations differ in zebra finches. J. Neurosci. 10:1541-1556.
116. SOHRABJI, F., NORDEEN, E. J., and NORDEEN, K. W. (1990). Selective impairement of song learning following lesions of a forebrain nucleus in juvenile zebra finch. Behav. Neural Biol. 53:51-63.
117. SOHRABJI, F., NORDEEN, K. W., and NORDEEN, E. J. (1989). Projections of androgen-accumulating neurons in a nucleus controlling avian song. Brain Res. 488:253-259.
118. SOHRABJI, F., NORDEEN, E. J., and NORDEEN, K. W. (1993). Characterization of neurons born and incorporated into a vocal control nucleus during avian song learning. Brain Res. 620:335-338.
119. TEKUMALLA, P., TONTONOZ, M., and KIRN, J. R. (1995). Thyroxine-induced cell death in the adult zebra finch neostriatum. Soc. Neurosci. Abstr. 24.11.
120. 3H-Thymidine autoradiographic analysis of telencephalic histogenesis in the chick embryo: II. Dynamics of neuronal migration, displacement, and aggregation. J. Comp. Neurol. 198:293-306.
121. VICARIO, D. S. and YOHAY, K. H. (1993). Song-selective auditory input to a forebrain vocal control nucleus in the zebra finch. J. Neurobiol. 24:488-505.
122. WEICHEL, K., SCHWAGER, G., HEID, P., GUTTINGER, H. R., and PESCH, A. (1986). Sex differences in plasma steroid concentrations and singing behaviour during ontogeny in canaries (Serinus canaria). Ethology 73:281-294.
123. WILD, J. M. (1994). The auditory-vocal-respiratory axis in birds. Brain Behav. Evol. 44:192-209.
124. WINGFIELD, J. C., HAHN, T. P., LEVIN, R., and HONEY, P. (1992). Environmental predictability and control of gonadal cycles in birds. J. Exp. Zool. 261:214-231.
125. ZHU, Y. S., YEN, P. M., CHIN, W. W., and PFAFF, D. W. (1996). Estrogen and thyroid hormone interaction on regulation of gene expression. Proc. Natl. Acad. Sci. USA 93:12587-12892.