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Lesions of the region ventral to the anterior septum increase mouse killing and reactivity but not social attack



Lesions of the region ventral to the anterior septum increase mouse killing and reactivity but not social attack



Behavioral & Neural Biology 34(3): 283-295



Rats with lesions in the region ventral to the anterior septum were tested in a novel situation for attack on a young adult rat and attack on a mouse. To determine whether they would also show enhanced social attack behavior, the lesioned animals that attacked the rat or killed a mouse in the paired encounter were tested 2 days later in a group colony composed of male and female adult rats and in some cases rat pups. Lesioned rats that attacked a young rat or killed a mouse in the paired encounter never developed piloerection or attacked resident males of the colony group. The lesioned animals did attack rat pups in the colony situation and also attacked females in the vicinity of the rat pups. Spontaneous mouse-killing rats also failed to attack males in the colony groups, but did attack rat pups and females. Alpha-male rats did develop piloerection and attacked resident males when introduced as intruders into a colony group. The alpha males did not attack rat pups or females in the colony group. Two of 9 sham-operated rats developed piloerection and attacked males in the colony group situation, although none attacked the rat pup or the mouse in the paired encounter. It is inferred that rats with lesions ventral to the anterior septum do not show enhanced intraspecific social attack behavior similar to that of alpha-male rats.

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Accession: 005803676

Download citation: RISBibTeXText

PMID: 7201790

DOI: 10.1016/s0163-1047(82)91667-3


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