The African striped mouse Lemniscomys barbarus as a model for aggression. Brain areas activated by agonistic encounters
Eur. j. anat
; 21(1): 49-64, ene. 2017. ilus, graf, tab
Article
en En
| IBECS
| ID: ibc-160039
Biblioteca responsable:
ES1.1
Ubicación: BNCS
ABSTRACT
During agonistic behavior several brain areas became differentially activated depending on the role the subject is taking. Several areas are mostly activated during the offender role and several others are activated if the subject plays a defensive role. The main goal of this work is to study in detail the anatomic areas involved in agonistic behavior using a novel animal model, the striped mouse Lemniscomys barbarus, a North African diurnal rodent well known by its natural high aggressiveness toward conspecifics. After social encounters, neural activation in brain areas related to agonistic behavior was measured by c-fos immunostaining. The encounters were recorded and behaviors related to the encounter were analyzed. We differentiated between the aggressive behavior (offender) and escape behavior (defender or defeated). Our results showed that conspecific confrontation induced general c-fos activation in both offender and defender in all measured areas in comparison with non-confronted control. Differences in neural activity between offender and defender were observed specifically in the lateral, cortical and medial amygdala, suprachiasmatic nucleus and the nucleus incertus, suggesting a potential role of these areas in displaying different kinds of behavior during conspecific confrontation. We found that, while in the lateral, medial and cortical amygdala defenders express significantly more c-fos than offenders, in the nucleus incertus of the brainstem the differential activation is just the opposite, Additionally, defenders display significantly more freezing than offenders. This work provides data showing that Lemniscomys barbarus is a widely useful model to study the anatomic background supporting agonistic behavior
RESUMEN
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Texto completo:
1
Colección:
06-national
/
ES
Base de datos:
IBECS
Asunto principal:
Emoción Expresada
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Agresión
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Conducta Agonística
/
Amígdala del Cerebelo
Límite:
Animals
Idioma:
En
Revista:
Eur. j. anat
Año:
2017
Tipo del documento:
Article