Amygdaloid lesions and social behavior in the golden hamster

Bunnell, B. N.; Sodetz, Frank J.; Shalloway, D.I.

doi:10.1016/0031-9384(70)90059-4

Cited by 82 publications

(28 citation statements)

References 9 publications

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“…Bilateral amygdaloid lesions have been shown to decrease social dominance in monkeys (Rosvold et al, 1954), decrease social dominance in dogs (Fuller et al, 1957), and decrease aggressive behavior in male golden hamsters (Bunnell et al, 1970).…”

Section: Methodsmentioning

confidence: 99%

Amygdaloid function in the central cholinergic mediation of shock-induced aggression in the rat

Rodgers

Brown

1976

Aggr. Behav.

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A series of experiments was designed to examine the role of central cholinergic mechanisms in shock‐induced aggression. Cholinergic blockade in the basolateral amygdala, ventral hippocampus, or dorsal hippocampus resulted in greatly reduced levels of fighting in response to footshock. However, while pain sensitivity remained unaltered in the amygdala group, both of the hippocampal groups exhibited decreased shock sensitivity. Further investigation of the amygdala revealed (1) increased fighting in response to increased cholinergic levels, (2) neuroanatomical specificity to the basolateral division of this complex, (3) that an intact basolateral amygdala is essential to the normal manifestation of shock‐induced aggression, and (4) that social attraction remains unaltered by cholinergic blockade of the basolateral amygdala. Motor coordination and motor activity were not significantly affected in any treatment condition.

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Section: Methodsmentioning

confidence: 99%

Amygdaloid function in the central cholinergic mediation of shock-induced aggression in the rat

Rodgers

Brown

1976

Aggr. Behav.

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“…Amygdalectomy does not simply disrupt the zoo social behavior of the hamster, "weakening" or "disorienting" it; its effect depends on the rank of the amygdalectomized animal; aggressive reactions change in dominant individuals, and manifestations of subordination in low-rank individuals (Bunnell et al, 1970). In addition to amygdalectomy, removal of the orbital sections of the frontal cortex also has a definite effect on the zoosocial behavior of hamsters.…”

Section: The Hierarchical Organization Of Coexisting Motivations: An mentioning

confidence: 98%

The Emotional Brain

Сімонов¹

1986

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“…Schematic drawings of afferent and efferent connections of the caudal-posterodorsal subdivision of the medial amygdaloid nucleus from select brain areas not depicted in Figure 8 in the male hamster (Murphy and Schneider, 1970) and also contribute to aggressive and maternal behavior (Hilger and Rowe, 1975;Marques, 1979). Lesions of MeA immediately and permanently abolish mating (Lehman and Winans, 1982) and blunt both aggression and maternal behavior (Bunnell et al, 1970;Malsbury et al, 1985). By contrast, MeP is characterized by dense immunoreactivity for gonadal steroid hormones (Li et al, 1993;Wood and Newman, 1993).…”

Section: Functional and Anatomical Characterization Of Mea And Mepmentioning

confidence: 99%

Bidirectional connections of the medial amygdaloid nucleus in the Syrian hamster brain: Simultaneous anterograde and retrograde tract tracing

1998

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In the male Syrian hamster, mating is dependent on chemosensory and hormonal stimuli, and interruption of either input prevents copulation. The medial amygdaloid nucleus (Me) is a key nodal point in the neural circuitry controlling male sexual behavior because it relays both odor and steroid cues. Me is comprised of two major subdivisions, anterior (MeA) and posterior (MeP), which have distinct, although overlapping efferent projections. The present study investigated the afferents and efferents of MeA and MeP by using combined anterograde and retrograde tract tracing. Phaseolus vulgaris-leucoagglutinin and cholera toxin B were injected by iontophoresis through a single glass micropipette and detected by immunohistochemistry. MeA has widespread connections with olfactory structures, whereas MeP is heavily interconnected with steroid-responsive brain regions. The efferent projections of MeA and MeP were similar to those reported previously for the rat and hamster. In particular, MeP projects to the posteromedial subdivision of the bed nucleus of the stria terminalis (BNST) and to the medial preoptic nucleus, whereas MeA projects to adjacent subnuclei in BNST and the preoptic area. MeA and MeP also have distinct patterns of afferent input. Furthermore, the combination of anterograde and retrograde tract tracers shows that MeA and MeP are each bidirectionally connected with each other and with limbic nuclei. These results demonstrate that subnuclei of Me are interconnected with limbic structures in hamster brain. These connections may contribute to chemosensory and hormonal integration to control male sexual behavior.

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Amygdaloid lesions and social behavior in the golden hamster

Cited by 82 publications

References 9 publications

Amygdaloid function in the central cholinergic mediation of shock-induced aggression in the rat

Amygdaloid function in the central cholinergic mediation of shock-induced aggression in the rat

The Emotional Brain

Bidirectional connections of the medial amygdaloid nucleus in the Syrian hamster brain: Simultaneous anterograde and retrograde tract tracing

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