Connections of the Piriform Cortex in Homing Pigeons &lt;i&gt;(Columba livia) &lt;/i&gt;Studied with Fast Blue and WGA-HRP

Bingman, Verner P.; Casini, G.; Nocjar, Christine; Jones, Tammy-Jo

doi:10.1159/000113635

Cited by 65 publications

(100 citation statements)

References 20 publications

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“…However, we did not find any effect of olfactory deprivation on Fos expression induced by male sexual behavior in the TnA. Furthermore, no effect of the sensory deprivations implemented in this study was detected on Fos expression in brain nuclei such as the medial and lateral striatum, the medial septum or the piriform cortex that are presumably part of the olfactory pathway [20,40,72,74]. It remains therefore difficult to interpret definitely the changes in Fos activation that were detected here in the caudal mPOA and in the BSTM in birds subjected to sensory deprivations before copulation.…”

Section: Effects Of Anosmia And/or Cloacal Gland Anesthesia On Fos Excontrasting

confidence: 76%

“…The numbers of Fos-ir cells were counted in brain areas previously implicated in the expression of male quail sexual behavior [7,24,58,82,83] and in brain areas potentially implicated in the avian olfactory pathway [20,40,72,74]. The number Fos-ir cells present in various brain regions was quantified by the experimenter (MT) who was blind to the experimental treatment of the birds using computer-assisted image analysis.…”

Section: Discussionmentioning

confidence: 99%

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Site-specific effects of anosmia and cloacal gland anesthesia on Fos expression induced in male quail brain by sexual behavior

Taziaux

Keller

Ball

et al. 2008

Behavioural Brain Research

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In rats, expression of the immediate early gene, c-fos observed in the brain following male copulatory behavior relates mostly to the detection of olfactory information originating from the female and to somatosensory feedback from the penis. However, quail, like most birds, are generally considered to have a relatively poorly developed sense of smell. Furthermore, quail have no intromittent organ (e.g., penis). It is therefore intriguing that expression of male copulatory behavior induces in quail and rats a similar pattern of c-fos expression in the medial preoptic area (mPOA), bed nucleus of the stria terminalis (BSTM) and parts of the amygdala. We analyzed here by immunocytochemistry Fos expression in the mPOA/BSTM/amygdala of male quail that had been allowed to copulate with a female during standardized tests. Before these tests, some of the males had either their nostrils plugged, or their cloacal area anesthetized, or both. A control group was not exposed to females. These manipulations did not affect frequencies of male sexual behavior and all birds exposed to a female copulated normally. In the mPOA, the increased Fos expression induced by copulation was not affected by the cloacal gland anesthesia but was markedly reduced in subjects deprived of olfactory input. Both manipulations affected copulation-induced Fos expression in the BSTM. No change in Fos expression was observed in the amygdala. Thus immediate early gene expression in the mPOA and BSTM of quail is modulated at least in part by olfactory cues and/or somatosensory stimuli originating from the cloacal gland. Future work should specify the nature of these stimuli and their function in the expression of avian male sexual behavior.

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Section: Effects Of Anosmia And/or Cloacal Gland Anesthesia On Fos Excontrasting

confidence: 76%

Section: Discussionmentioning

confidence: 99%

Site-specific effects of anosmia and cloacal gland anesthesia on Fos expression induced in male quail brain by sexual behavior

Taziaux

Keller

Ball

et al. 2008

Behavioural Brain Research

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“…According to anatomical studies on homing pigeons, the olfactory bulbs project mainly to the piriform cortex through both ipsilateral and contralateral fibres, although the latter are less numerous (Bingman et al, 1994;Reiner and Karten, 1985). A specific role of the piriform cortex in pigeon navigation is supported by lesion experiments, which have shown a navigational impairment in the piriform-cortex-ablated pigeons (Papi and Casini, 1990).…”

Section: Discussionmentioning

confidence: 99%

Olfactory lateralization in homing pigeons: a GPS study on birds released with unilateral olfactory inputs

Gagliardo

Filannino

Ioalè

et al. 2011

Journal of Experimental Biology

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SUMMARYA large body of evidence has shown that pigeons rely on an olfactory-based navigational map when homing from unfamiliar locations. Previous studies on pigeons released with one nostril occluded highlighted an asymmetry in favour of the right nostril, particularly concerning the initial orientation performance of naïve birds. Nevertheless, all pigeons experiencing only unilateral olfactory input showed impaired homing, regardless of the side of the occluded nostril. So far this phenomenon has been documented only by observing the birds' vanishing bearings. In the present work we recorded the flight tracks of pigeons with previous homing experience equipped with a GPS data logger and released from an unfamiliar location with the right or the left nostril occluded. The analysis of the tracks revealed that the flight path of the birds with the right nostril occluded was more tortuous than that of unmanipulated controls. Moreover, the pigeons smelling with the left nostril interrupted their journey significantly more frequently and displayed more exploratory activity than the control birds, e.g. during flights around a stopover site. These data suggest a more important involvement of the right olfactory system in processing the olfactory information needed for the operation of the navigational map.

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“…Accordingly, plugging only the right nostril altered neuronal ZENK expressions during homing (Patzke et al, 2010). Since the OB projects bilaterally to the CPi (Reiner and Karten, 1985;Bingman et al, 1994), it is conceivable that the functional lateralization is based on an asymmetrical projection from the OB to CPi with a stronger projection from the right OB to the left CPi. A larger bilateral innervation of the dominant brain hemisphere is also known from visual pathways in birds (Güntürkün et al, 1998;Rogers and Deng, 1999;Manns and Güntürkün, 2009).…”

mentioning

confidence: 99%

“…Their axons constitute the olfactory nerves, which terminate ipsilaterally in the olfactory bulbs (OBs). The efferent mitral cells of the OBs in turn project bilaterally to several forebrain areas with the piriform cortex (CPi) as one of the major targets (Reiner and Karten, 1985;Ebinger et al, 1992;Bingman et al, 1994). Electrophysiological studies and molecular analyses of olfactory receptor genes suggest the avian olfactory system to be a highly differentiated sense that is of higher complexity than previously assumed (McKeegan et al, 2002;Sieck and Wenzel, 1969;Tucker, 1965).…”

mentioning

confidence: 99%

Telencephalic organization of the olfactory system in homing pigeons (Columba livia)

2011

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Abstract-Pigeons use olfactory cues to navigate over unfamiliar areas, and any impairment of the olfactory system generates remarkable reduction of homing performance. Lesion and deprivation studies suggest a critical involvement of the right nostril and thus, the right olfactory bulb (OB) and the left piriform cortex (CPi) for initial orientation. This functional pattern suggests that OB and CPi are asymmetrically connected with a stronger projection from the right OB to the left CPi. However, the structural organization of the olfactory system is not unequivocally clarified yet. Thus, we re-analyzed the system by antero-and retrograde tract tracing with biotinylated dextran amine and choleratoxin subunit B, and we especially evaluated quantitative differences in the number of cells in the OB innervating the left and right CPi. Our anterograde tracing data verified a strong bilateral input to the CPi, and the prepiriform cortex (CPP), as well as small projections to the ipsilateral medial septum and the dorsolateral corticoid area and the nucleus taeniae of the amygdala in both hemispheres. Apart from the bilateral bulbar afferents, CPi in turn receives unequivocal input from the ipsilateral CPP, hyperpallium densocellulare, dorsal arcopallium, and from a cluster of cells located within the frontolateral nidopallium. Thus, an indirect connection between OB and CPi is only mediated by the CPP. For quantitative analysis of bulbar input to the CPi, we counted the number of ipsi-and contralaterally projecting neurons located in the OB after injections into the left or right CPi. Retrogradely labeled cells were found bilaterally in the OB with a higher number of ipsilaterally located cells. The bilaterality index did not differ after left-or rightsided CPi injections indicating that the functional lateralization of the olfactory system is not simply based on differences in the number of projecting axons of the major processing stream.

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Connections of the Piriform Cortex in Homing Pigeons <i>(Columba livia) </i>Studied with Fast Blue and WGA-HRP

Cited by 65 publications

References 20 publications

Site-specific effects of anosmia and cloacal gland anesthesia on Fos expression induced in male quail brain by sexual behavior

Site-specific effects of anosmia and cloacal gland anesthesia on Fos expression induced in male quail brain by sexual behavior

Olfactory lateralization in homing pigeons: a GPS study on birds released with unilateral olfactory inputs

Telencephalic organization of the olfactory system in homing pigeons (Columba livia)

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