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- Keyword
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- Auditory selectivity (1)
- Avian hippocampus (1)
- Birdsong and speech (1)
- Birdsong and speech acquisition (1)
- Cluster N (1)
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- Estradiol (1)
- Forebrain auditory areas (1)
- Hippocampus (1)
- Immunohistochemistry (1)
- Innate template (1)
- Magnetic compass (1)
- Magnetoreception (1)
- Neural plasticity (1)
- Orientation and navigation (1)
- Serotonin (1)
- Songbird (1)
- Spatial cognition (1)
- Template hypothesis (1)
- Vocal learning (1)
- White-throated sparrow (1)
- Yellow-rumped warbler (1)
- ZENK (1)
- Zebra finch (1)
Articles 1 - 3 of 3
Full-Text Articles in Animal Sciences
Neural Responses To Magnetic Orientation Information In Songbirds, Madeleine Ir Brodbeck
Neural Responses To Magnetic Orientation Information In Songbirds, Madeleine Ir Brodbeck
Electronic Thesis and Dissertation Repository
Effective navigation and orientation is essential for animals to survive. The study of migratory birds provides insights into these processes, particularly through mechanisms like the geomagnetic compass, which uses Earth's magnetic field for directional information. A brain region in songbirds relevant to this is cluster N, known for its potential role in processing geomagnetic information. Notably, cluster N appears exclusive to nocturnally migratory birds, being active solely at night, and lesion studies reveal that an intact cluster N is necessary for geomagnetic compass orientation. However, given the scarcity of empirical data concerning cluster N, substantial questions persist regarding its function. …
The Role Of Serotonin In The Estradiol-Dependent Selectivity Of Auditory Regions In Songbirds, Calista J. Henry
The Role Of Serotonin In The Estradiol-Dependent Selectivity Of Auditory Regions In Songbirds, Calista J. Henry
Electronic Thesis and Dissertation Repository
Breeding-typical levels of estradiol in songbirds has been shown to lead to selective auditory processing and induce a release of serotonin in auditory regions of the forebrain. These findings triggered the question of whether auditory discrimination is driven by estradiol directly, or by the associated release of serotonin. I treated non-breeding female white-throated sparrows (Zonotrichia albicollis) with either blank implants, 17β-estradiol, serotonin enhancer and blank implants, or serotonin antagonist and 17β-estradiol implants. Birds then heard male conspecific songs or control tones, and ZENK-immunoreactivity was quantified in the caudomedial nidopallium (NCM) and caudomedial mesopallium (CMM). While I did not …
Testing The Template Hypothesis Of Vocal Learning In Songbirds., Adriana Diez
Testing The Template Hypothesis Of Vocal Learning In Songbirds., Adriana Diez
Electronic Thesis and Dissertation Repository
The auditory forebrain regions NCM and CMM of songbirds are associated with perception and complex auditory processing. Expression of the immediate-early gene ZENK varies in response to different sounds. Two hypotheses are proposed for this. First, ZENK may reflect access to a representation of song memories. Second, ZENK may reflect attention. I tested these hypotheses by measuring ZENK in response to tutored heterospecific or isolate songs compared to non-tutored wild-type song. Young zebra finch females were exposed to different tutoring conditions and later exposed to different playbacks, and the expression of ZENK in CMM and NCM measured. ZENK responses varied …