Isolation-dependent enhancement of 2-[14C]deoxyglucose uptake in the forebrain of zebra finch males

Bischof, Hans‐Joachim; Herrmann, Klaus

doi:10.1016/s0163-1047(88)90402-5

Cited by 21 publications

(20 citation statements)

References 22 publications

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“…It therefore appears as if the additional activation of telencephalic areas by arousal can only be observed in secondary projection areas of the two visual pathways. The activity of primary sensory areas are probably not affected by arousal, as previous measurements of field L, an acoustic area, suggested [5,6].…”

Section: Introductionmentioning

confidence: 62%

“…These layers, the HA and HD, show additional activation in arousing situations in zebra finches. The HIS has, as yet, not been identified in these birds [5,6].…”

Section: Introductionmentioning

confidence: 87%

“…For the measurements, only those of the terminal sections of the dendrites were selected, which were parallel to the surface of the slides. Terminal sections were chosen because earlier studies have shown that these are most strongly affected by experience [6,21,22]. After drawing the selected terminal sections (up to 4 per neuron, in total 20 for each bird and area), the number of spines/10 gm was estimated with the help of a graphics tablet.…”

Section: Golgi Experimentsmentioning

confidence: 99%

“…2-Deoxyglucose (2-DG) studies in zebra finches [5,6] and chicks [18] indicated that the activation pattern of the telencephalon of birds depends not only on sensory stimulation, but also on the general arousal level of the animal. Four areas of the forebrain are activated only if the stimulus is arousing: the hyperstriatum accessorium and dorsale (HAD), the lateral part of the neo-and hyperstriatum (LNH), the medial part of the neo-and hyperstriatum (MNH) and the caudal part of the archiand neostriatum (ANC).…”

Section: Introductionmentioning

confidence: 99%

“…From the ectostriatal core, information is processed to the surrounding ectostriatal belt and further to the adjacent neostriatum, the NIL (neostriatum intermedium laterale) [ 12,20], which is part of the LNH, another of the 'arousal' areas revealed by the studies of Bischof and Herrmann [5,6]. It therefore appears as if the additional activation of telencephalic areas by arousal can only be observed in secondary projection areas of the two visual pathways.…”

Section: Introductionmentioning

confidence: 99%

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Activity-dependent plasticity in visual forebrain areas of the zebra finch

Rollenhagen

Bischof

1996

Behavioural Brain Research

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It has previously been shown that the activity of some areas of the forebrain of birds is dependent on the arousal level of the animal. Other areas do not show this dependency. This paper, on the basis of 2-DG experiments and spine density measurements on Golgi-impregnated tissue, shows that primary telencephalic target areas of the two visual pathways of zebra finch males are not dependent on arousal for activation. In contrast, secondary areas of both visual pathways show arousal-dependent activation. Only the secondary visual areas also show effects of rearing conditions on the spine density: isolation of the birds from day 40 reduces spine density in the hyperstriatum accessorium (HA) of the thalamofugal pathway, and enhances spine density in the lateral neo/hyperstriatum (LNH, tectofugal pathway) significantly from day 80, if compared to aviary-reared birds. A 1-week exposure to a female eliminates the isolation effects in both areas. A second isolation period again reduces the spine density in the HA, but does not enhance it again in the LNH. By comparison with previous studies, we conclude that the spine density in the HA reflects the complexity of the social environment. The irreversible reduction of spine density in the LNH as consequence of the 7-day exposure to a female is interpreted as physiological correlate of an imprinting process, which has previously been shown to occur at the same time. The effects in both areas, the HA and LNH, are dependent on arousal, which may be mediated by brainstem efferents innervating the secondary, but not the primary, visual areas in birds and in mammals.

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Section: Introductionmentioning

confidence: 62%

“…These layers, the HA and HD, show additional activation in arousing situations in zebra finches. The HIS has, as yet, not been identified in these birds [5,6].…”

Section: Introductionmentioning

confidence: 87%

Section: Golgi Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Activity-dependent plasticity in visual forebrain areas of the zebra finch

Rollenhagen

Bischof

1996

Behavioural Brain Research

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Enhanced fos expression in the zebra finch (Taeniopygia guttata) brain following first courtship

Sadananda

Bischof

2002

J of Comparative Neurology

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Young zebra finch males that court a female for the first time develop a stable preference for the females of that species. On the neuronal level, consolidation of the imprinted information takes place. Here we demonstrate that first courtship or being chased around in the cage leads to enhanced fos expression in forebrain areas implicated in learning and imprinting in zebra finch males compared with birds reared in isolation or in the aviary. Two of the forebrain areas highly active during first courtship (as demonstrated by the 14C-2-deoxyglucose technique), the imprinting locus latral neo/hyperstriatum ventrale (LNH) and the secondary visual area hyperstriatum accessorium/dorsale (HAD), demonstrate enhanced fos expression. Two other imprinting-related areas, the medial neo/hyperstriatum ventrale (MNH) and archistriatum/neostriatum caudale (ANC), do show c-fos induction; however, the areas are not congruous with those demarcated by the 2-DG autoradiographic studies. Additional telencephalic areas include the olfactory lobe, the information storage site lobus parolfactorius (LPO), the memory site hippocampus, the auditory caudomedial neostriatum implicated in the strength of song learning, and the caudolateral neostriatum, which is comparable to the mammalian prefrontal cortex. In addition, c-fos is induced by first courtship and chasing in neurosecretory cell groups of the preoptic area and hypothalamus associated with the repertoire of sexual behavior and stress or enhanced arousal. Enhanced fos expression is also observed in brainstem sources of specific (noradrenergic, catecholaminergic) and nonspecific (reticular formation) activating pathways with inputs to higher brain areas implicated in the imprinting process. Birds reared in isolation or alternatively in the aviary with social and sexual contact to conspecifics showed attenuated or no fos expression in most of the above-mentioned areas. First courtship and chasing both lead to enhanced uptake of 2-DG in the four imprinting areas, as well as subsequent changes in spine density-an anatomical manifestation of the imprinting process. fos expression in the imprinting and other telencephalic, preoptic, hypothalamic, and mesencephalic brain regions indicates processing of stimuli originating from exposure (like chasing) and the analysis of stimuli in a behaviorally relevant, sexually explicit context (like first courtship). c-fos induction in these brain areas indicates its involvement in the triggering of neural changes that accompany the learning process of imprinting, leading eventually to alterations in dendritic spine density in the zebra finch.

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A comparative analysis of the dopaminergic innervation of the executive caudal nidopallium in pigeon, chicken, zebra finch, and carrion crow

Eugen

Tabrik

Güntürkün

et al. 2020

J of Comparative Neurology

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Despite the long, separate evolutionary history of birds and mammals, both lineages developed a rich behavioral repertoire of remarkably similar executive control generated by distinctly different brains. The seat for executive functioning in birds is the nidopallium caudolaterale (NCL) and the mammalian equivalent is known as the prefrontal cortex (PFC). Both are densely innervated by dopaminergic fibers, and are an integration center of sensory input and motor output. Whereas the variation of the PFC has been well documented in different mammalian orders, we know very little about the NCL across the avian clade. In order to investigate whether this structure adheres to species-specific variations, this study aimed to describe the trajectory of the NCL in pigeon, chicken, carrion crow and zebra finch. We employed immunohistochemistry to map dopaminergic innervation, and executed a Gallyas stain to visualize the dorsal arcopallial tract that runs between the NCL and the arcopallium. Our analysis showed that whereas the trajectory of the NCL in the chicken is highly comparable to the pigeon, the two Passeriformes show a strikingly different pattern. In both carrion crow and zebra finch, we identified four different subareas of high dopaminergic innervation that span the entire caudal forebrain. Based on their sensory input, motor output, and involvement in dopamine-related cognitive control of the delineated areas here, we propose that at least three morphologically different subareas constitute the NCL in these songbirds. Thus, our study shows that comparable to the PFC in mammals, the NCL in birds varies considerably across species.

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Isolation-dependent enhancement of 2-[14C]deoxyglucose uptake in the forebrain of zebra finch males

Cited by 21 publications

References 22 publications

Activity-dependent plasticity in visual forebrain areas of the zebra finch

Activity-dependent plasticity in visual forebrain areas of the zebra finch

Enhanced fos expression in the zebra finch (Taeniopygia guttata) brain following first courtship

A comparative analysis of the dopaminergic innervation of the executive caudal nidopallium in pigeon, chicken, zebra finch, and carrion crow

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