The distribution of enkephalinlike immunoreactivity in the telencephalon of the adult and developing domestic chicken

Immunohistochemical techniques were used to determine the distribution of enkephalinlike immunoreactivity in the telencephalon of chicken. The densest accumulation of enkephalinergic neurons and fibers was observed within the paleostriatal complex, the avian equivalent of the mammalian basal ganglia. Numerous small enkephalinergic neurons were observed in both lobus parolfactorius (LPO) and the paleostriatum augmentatum (PA), the two components of the small-celled portion of the paleostriatal complex. The enkephalinergic neurons of LPO-PA appeared to give rise to a dense plexus of enkephalinergic fibers within the large-celled zone of the paleostriatal complex, the paleostriatum primitivum (PP). The distribution of enkephalin within the avian paleostriatial complex, when compared to the distribution of enkephalin within the mammalian basal ganglia, supports previous proposals that PP is comparable to the mammalian globus pallidus and that PA-LPO are comparable to the caudate-putamen (Karten and Dubbeldam, '73; Kitt and Brauth, '81; Parent and Olivier, '70; Reiner et al., '83). Observations on the development of enkephalinlike immunoreactivity within the chicken paleostriatal complex also support the suggestion that the major component nuclei of the avian paleostriatal complex have correspondents within the mammalian basal ganglia. Enkephalinlike immunoreactivity was also observed within cell bodies and fibers in other portions of the avian telencephalon. Within the ventrolateral telencephalon, the nucleus accumbens, nucleus of the diagonal band, and tuberculum olfactorium contained enkephalinergic cell bodies and fibers while only enkephalinergic fibers were observed in the portion of the avian telencephalon that has been termed the ventral paleostriatum (Kitt and Brauth, '81; Reiner et al., '83). Within the medial wall of the telencephalon, enkephalinergic fibers were observed in the lateral septal nucleus, while enkephalinergic cell bodies and fibers were observed in the parahippocampal area. Little enkephalinlike immunoreactivity was observed dorsal to the paleostriatal complex except in the hyperstriatum dorsale. Within the hyperstriatum dorsale, a band of enkephalinergic neurons appeared to give rise to an overlying parallel band of dense enkephalinergic fibers. The distribution of enkephalinlike immunoreactivity within the avian telencephalon thus shows remarkable similarity to that seen in the mammalian telencephalon. The largest accumulation of enkephalinlike immunoreactivity within the telencephalon of both vertebrate classes appears to be found within the ventrolateral wall of the telencephalon, including the basal ganglia. In comparison, much less enkephalinlike immunoreactivity is observed in either the mammalian neocortex or in the avian correspondent of mammalian neocortex.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/50024/1/902280210_ftp.pd

The rhetorical complexity of competitive and common victimhood in conversational discourse

Much current research on collective victimhood acknowledges the role of rhetoric but does not fully address the implications for micro-level variation in personal expressions of victimhood. The focus has tended to be on individual differences in collective victimhood construals where people may either see their group as the sole possessor of victim-status or may incorporate other groups into an inclusive category. While recent research sees a strategic element in some “inclusivity”, we argue that all claims of victimhood are strategic. By using a discursive approach, we show variability in the expression of victimhood and how this accomplishes different activities in conversations. Several focus groups consisting of victims from Northern Ireland were analysed to identify presentations of victimhood and their relation to the unfolding dynamics of the conversation. We demonstrate that presentation of victimhood is an interactional concern, link this to the concept of “needs” and suggest implications this might have

Individual differences in system justification predict power and morality-related needs in advantaged and disadvantaged groups in response to group disparity

Guided by the needs-based model, we explored how individual differences in system justification predict group members’ needs in response to information about group-based disparities. Across two studies (N = 819), we found that among disadvantaged-group members (LGBTIQ* individuals/women) system justification was negatively related to need for power. Among advantaged-group members ([cis-]heterosexuals/men), system justification was negatively related to motivation to restore their ingroup’s moral essence (i.e., moral shame and wish that the ingroup would act more morally) but positively related to motivation to restore their ingroup’s moral image (i.e., need for positive moral image and expectation that the outgroup should acknowledge the ingroup’s morality). These results theoretically extend the needs-based model by offering a more nuanced picture of morality-related needs. Further, they underline the importance of considering individual differences in system justification for understanding advantaged- and disadvantaged-group members’ responses to social inequality

The Effect of Medicare Eligibility on Spousal Insurance Coverage

A majority of married couples in the United States take advantage of the fact that employers often provide health insurance coverage to spouses. When the older spouses become eligible for Medicare, however, many of them can no longer provide their younger spouses with coverage. In this paper, we study how spousal eligibility for Medicare affects the health insurance and health care access of the younger spouse. We find spousal eligibility for Medicare results in the younger spouse having worse insurance coverage and reduced access to health care services

Characterization of VIP-sensitive adenylate cyclase in guinea pig brain

This paper demonstrates that VIP activates an adenylate cyclase from a synaptosomal fraction of guinea pig brain. This activation was not potentiated by guanyl triphosphate nucleotides, and was unaffected by α- and β-adrenergic blockers and by atropine. Furthermore, peptides related to VIP, like secretin, glucagon and somatostatin, were devoid of significant agonistic or antagonistic activity. EGTA was also without effect on basal and VIP stimulated activities while calcium at concentrations higher than 10-5 M inhibited both activities.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Immunocytochemical studies with antisera against Leu-enkephalin and an enkephalin-precursor fragment (BAM-22P) in the rat brain

Rats given high doses of colchicine (300-400 ug, i.c.v.) were used to investigate the comparative distribution of Leu-enkephalin and bovine adrenal medullary enkephalin-precursor fragment (BAM-22P) in the brain. Leu-enkephalin immunoreactive neurons have a widespread distribution throughout the neuraxis. In most areas adjacent section analysis showed BAM-22P and Leu-enkephalin immunoreactive perikarya to be similarly localized. Brain enkephalin biosynthetic mechanisms might therefore be similar to those regulating adrenal medullary enkephalin biosynthesis.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/23839/1/0000078.pd

How many pennies for your pain? Willingness to compensate as a function of expected future interaction and intentionality feedback

Despite increased research efforts in the area of reconciliation and trust repair in economic relations, most studies depart from a victim’s perspective. Specifically, these studies evaluate the process of trust repair by looking at the impact of restoration tactics on victims’ reactions. We focused on the transgressor’s perspective and present findings from two studies that investigated how the amount of compensation that a transgressor is willing to pay depends on victims’ reactions to the transgression (i.e. whether they claim the transgression happened intentionally or unintentionally) and the time horizon of the relationship between the transgressor and the victim (future vs. no future interaction). We hypothesized and found that transgressors are willing to pay less compensation to a victim who believes the transgression happened intentionally (as opposed to unintentionally), but only so when they share no future interaction perspective together. When transgressors have a future interaction perspective with the victim, intentionality feedback does not affect compensation size