Multiple amygdaloid divisions of arcopallium send convergent projections to the nucleus accumbens and neighboring subpallial amygdala regions in the domestic chicken: a selective pathway tracing and reconstruction study

Hanics, János; Teleki, Gyöngyi; Alpár, Alán; Székely, Andrea; Csillag, András

doi:10.1007/s00429-016-1219-8

Cited by 32 publications

(46 citation statements)

References 57 publications

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“…Similarly, the pigeon hippocampal formation projects to the accumbens and paratubercular regions (Atoji and Wild, 2004). Furthermore, the avian Stvc, ventral part of the lateral MSt (proposed accumbens shell and core), and BSTL receive projections from the dorsal arcopallium, which may be comparable in part to the mammalian projection from the pallial amygdala (Hanics et al, 2016). …”

Section: Discussionmentioning

confidence: 95%

Neurochemical compartmentalization within the pigeon basal ganglia

Bruce

Erichsen

Reiner

2016

Journal of Chemical Neuroanatomy

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The goals of this study were to use multiple informative markers to define and characterize the neurochemically distinct compartments of the pigeon basal ganglia, especially striatum and accumbens. To this end, we used antibodies against 12 different neuropeptides, calcium-binding proteins or neurotransmitter-related enzymes that are enriched in the basal ganglia. Our results clarify boundaries between previously described basal ganglia subdivisions in birds, and reveal considerable novel heterogeneity within these previously described subdivisions. Sixteen regions were identified that each displayed a unique neurochemical organization. Four compartments were identified within the dorsal striatal region. The neurochemical characteristics support previous comparisons to part of the central extended amygdala, somatomotor striatum, and associational striatum of mammals, respectively. The medialmost part of the medial striatum, however, has several unique features, including prominent pallidal-like woolly fibers and thus may be a region unique to birds. Four neurochemically distinct regions were identified within the pigeon ventral striatum: the accumbens, paratubercular striatum, ventrocaudal striatum, and the ventral area of the lateral part of the medial striatum that is located adjacent to these regions. The pigeon accumbens is neurochemically similar to the mammalian rostral accumbens. The pigeon paratubercular and ventrocaudal striatal regions are similar to the mammalian accumbens shell. The ventral portions of the medial and lateral parts of the medial striatum, which are located adjacent to accumbens shell-like areas, have neurochemical characteristics as well as previously reported limbic connections that are comparable to the accumbens core. Comparisons to neurochemically identified compartments in reptiles, mammals, and amphibians indicate that, although most of the basic compartments of the basal ganglia were highly conserved during tetrapod evolution, uniquely avian compartments may exist as well.

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Section: Discussionmentioning

confidence: 95%

Neurochemical compartmentalization within the pigeon basal ganglia

Bruce

Erichsen

Reiner

2016

Journal of Chemical Neuroanatomy

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“…Second, electrolytic lesions cannot unequivocally distinguish the contribution of the lateral Arco. Most probably, the lesions placed in the dorsal and intermediate Arco also damaged the efferent fibers issued from the lateral Arco, as has been reported previously (Atoji et al ., ; Hanics et al ., ). Additionally, lesions in the lateral Arco appeared to also affect the medial Arco regions to some degree.…”

Section: Discussionmentioning

confidence: 97%

“…() and Hanics et al . (). Based on visual inspections of the intensity of labels, blind to the injection site, we determined five grades of fiber density: abundant, moderate, low, sparse (only 2–3 fibers in the entire region), and absent.…”

Section: Methodsmentioning

confidence: 97%

Selective contribution of the telencephalic arcopallium to the social facilitation of foraging efforts in the domestic chick

Xin

Ogura

Leo

et al. 2016

Eur J of Neuroscience

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To investigate the neural basis of socio-economic behaviors in birds, we examined the effects of bilateral electrolytic lesions of arcopallium (Arco, the major descending pallial area of the avian telencephalon) and the surrounding nuclei in domestic chicks. We tested foraging effort (running distance) in an I-shaped maze with two food patches that delivered food in a biased manner according to a variable interval schedule. Normally, chicks run back and forth between the patches, and the patch use time matches the respective food delivery rate. In the paired phase, even without actual interference of food, chicks showed social facilitation of running effort compared with the single phase. Chicks with lesions in the Arco and lateral Arco showed significant reductions in social facilitation. The lesion effects of the lateral Arco were particularly selective, as it was not accompanied by changes in running distance in the single phase. Lesions of the nidopallium and nucleus taeniae of the amygdala produced no changes in foraging behavior. On the other hand, the Arco lesion did not impair social facilitation of operant peck latency. In accordance with this, anterograde tracing revealed characteristic projections from the lateral Arco to the extended amygdala, hippocampus, and septum, as well as wide areas of limbic nuclei in the hypothalamus and medial areas of the striatum including the nucleus accumbens. Pathways from the lateral Arco could enable chicks to overcome the extra effort investment of social foraging, suggesting functional and anatomical analogies to the anterior cingulate cortex and basolateral amygdala in mammals.

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“…The mammalian basolateral amygdala integrates information from multiple sensory modalities and is involved in fear conditioning and the modulation of goal-directed behaviors [for a review, see O'Connell and Hofmann, 2011]. A recent hodological analysis suggests that the avian dorsal arcopallium sends dense excitatory projections to the nucleus accumbens, lateral BST and extended amygdala [Hanics et al, 2016]. Thus, we speculate that winter changes in receptor binding for these neuropep-tides within the arcopallium could promote affiliation/ social approach in winter-flocking species by reducing winter social anxiety.…”

Section: Affiliation Hot Spots In the Brainmentioning

confidence: 99%

Seasonal Variation in Group Size Is Related to Seasonal Variation in Neuropeptide Receptor Density

Wilson

Goodson

Kingsbury³

2016

Brain Behav Evol

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In many species, seasonal variation in grouping behavior is widespread, with shifts towards territoriality in the breeding season and grouping in the winter. Compared to the hormonal and neural mechanisms of seasonal territorial aggression, the mechanisms that promote seasonal grouping have received little attention. We collected brains in spring and winter from wild-caught males of two species of emberizid sparrows that seasonally flock (the field sparrow, Spizella pusilla, and the dark-eyed junco, Junco hyemalis) and two species that do not seasonally flock (the song sparrow, Melospiza melodia, and the eastern towhee, Pipilo erythrophthalmus). We used receptor autoradiography to quantify seasonal plasticity in available binding sites for three neuropeptides known to influence social behavior. We examined binding sites for ¹²⁵I-vasoactive intestinal polypeptide (VIP), ¹²⁵I-sauvagine (SG, a ligand for corticotropin-releasing hormone receptors) and ¹²⁵I-ornithine vasotocin analog (OVTA, a ligand for the VT3 nonapeptide). For all species and ligands, brain areas that exhibited a seasonal pattern in binding density were characterized by a winter increase. Compared to nonflocking species, seasonally flocking species showed different binding patterns in multiple brain areas. Furthermore, we found that winter flocking was associated with elevated winter ¹²⁵I-VIP binding density in the medial amygdala, as well as ¹²⁵I-VIP and ¹²⁵I-OVTA binding density in the rostral arcopallium. While the functional significance of the avian rostral arcopallium is unclear, it may incorporate parts of the pallial amygdala. Our results point to this previously undescribed area as a likely hot spot of social modulation.

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Multiple amygdaloid divisions of arcopallium send convergent projections to the nucleus accumbens and neighboring subpallial amygdala regions in the domestic chicken: a selective pathway tracing and reconstruction study

Cited by 32 publications

References 57 publications

Neurochemical compartmentalization within the pigeon basal ganglia

Neurochemical compartmentalization within the pigeon basal ganglia

Selective contribution of the telencephalic arcopallium to the social facilitation of foraging efforts in the domestic chick

Seasonal Variation in Group Size Is Related to Seasonal Variation in Neuropeptide Receptor Density

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