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8 resultados
Catecholaminergic inputs to aromatase cells in the canary auditory forebrain.
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The caudomedial nidopallium in songbirds is a specialized forebrain auditory region involved in the processing of species-typical vocalizations. It receives a prominent catecholaminergic projection with many fibers forming basket-like structures around non-immunoreactive cells. We investigated in
Gonadal steroid receptor mRNA in catecholaminergic nuclei of the canary brainstem.
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Steroid actions in the song system may be modulated by ascending inputs from catecholaminergic (CA) brain nuclei; however, whether these nuclei contain steroid receptors is unknown. Here, we compared the distribution of androgen receptor (AR) and estrogen receptor-alpha (ER-alpha) mRNA with that of
The origin of catecholaminergic inputs to the song control nucleus RA in canaries.
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Song control nuclei in oscines receive dense catecholaminergic inputs but their anatomical origin is poorly understood. We analyzed catecholaminergic inputs to the nucleus robustus archistriatalis (RA) in canaries by retrograde tract-tracing combined with immunocytochemistry for tyrosine
Identification of the origin of catecholaminergic inputs to HVc in canaries by retrograde tract tracing combined with tyrosine hydroxylase immunocytochemistry.
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The telencephalic nucleus HVc (sometimes referred to as the high vocal center) plays a key role in the production and perception of birdsong. Although many afferent and efferent connections to this nucleus have been described, it has been clear for many years, based on chemical neuroanatomical
Brain-derived neurotrophic factor signaling in the HVC is required for testosterone-induced song of female canaries.
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Testosterone-induced singing in songbirds is thought to involve testosterone-dependent morphological changes that include angiogenesis and neuronal recruitment into the HVC, a central part of the song control circuit. Previous work showed that testosterone induces the production of vascular
The distribution of tyrosine hydroxylase in the canary brain: demonstration of a specific and sexually dimorphic catecholaminergic innervation of the telencephalic song control nulcei.
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Singing and the processing of auditory information related to song can be affected by experimental manipulations of catecholamine activity in the brain of zebra finches. We investigated, by immunocytochemistry in the brain of male and female canaries, the distribution of tyrosine hydroxylase (TH),
Song activation by testosterone is associated with an increased catecholaminergic innervation of the song control system in female canaries.
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In canaries, singing and a large number of morphological features of the neural system that mediates the learning, perception and production of song exhibit marked sex differences. Although these differences have been mainly attributed to sex-specific patterns of the action of testosterone and its
Novel missense mutation affecting the LIM-A domain of LMX1B in a family with Nail-Patella syndrome.
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Nail-patella syndrome (NPS) is a rare autosomal dominant disease characterized by developmental defects of dorsal limb structures, the kidney, and the eye, that manifest as dysplastic nails, hypoplastic or absent patella, elbow dysplasia, iliac horns, glomerulopathy, and adult-onset glaucoma,
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