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Titolo:
LESIONS OF THE MEDIAL PREFRONTAL CORTEX AND SEXUAL-BEHAVIOR IN THE MALE-RAT
Autore:
AGMO A; VILLALPANDO A; PICKER Z; FERNANDEZ H;
Indirizzi:
UNIV TOURS,FAC SCI,PSYCHOPHYSIOL LAB,PARC GRANDMONT F-37200 TOURS FRANCE UNIV ANAHUAC,DEPT PSYCHOL MEXICO CITY DF MEXICO
Titolo Testata:
Brain research
fascicolo: 1-2, volume: 696, anno: 1995,
pagine: 177 - 186
SICI:
0006-8993(1995)696:1-2<177:LOTMPC>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPATIAL RESPONSE ALTERNATION; FRONTAL EYE FIELD; CORTICAL-LESIONS; EFFERENT PROJECTIONS; TIMIDITY; FEMALE; ORGANIZATION; AGGRESSION; MOTIVATION; REACTIVITY;
Keywords:
SEXUAL BEHAVIOR; PREFRONTAL CORTEX; MOTIVATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
53
Recensione:
Indirizzi per estratti:
Citazione:
A. Agmo et al., "LESIONS OF THE MEDIAL PREFRONTAL CORTEX AND SEXUAL-BEHAVIOR IN THE MALE-RAT", Brain research, 696(1-2), 1995, pp. 177-186

Abstract

Lesions of the cerebral cortex near the midline in the frontal regionappearing to destroy most of the cingulate cortex and adjacent prefrontal areas had profound effects on male rat sexual behavior. At the first postoperative tests, one week after the lesion, the mount and intromission latencies were extremely long(> 60 min). They continued elevated at every fortnightly test until postlesion week 13, when they wereno longer different from controls. However, the proportion of animalsthat intromitted or ejaculated was reduced at this time. The lesion had a slight effect on the number of intromissions and on the intromission ratio, but did not reliably modify other parameters of sexual behavior in those males that copulated after operation. These data suggestthat the medial prefrontal cortex is important for the initiation of sexual behavior but less so for its execution. It is proposed that theelaboration and/or interpretation of environmental stimuli are rendered deficient by the lesion. Consequently, sexual behavior is activatedonly with difficulty. This coincides with the arousal hypothesis proposed by Beach [8]. There appears to exist a spontaneous recovery of the mechanisms responsible for the activation of sex behavior because the lesioned group was not different from the sham or intact groups 13 weeks postlesion. Remaining cortical tissue or other brain structures may compensate for the initial deficiencies. However, the lesion's effect on intromission behavior did not diminish with time. This could suggest that possible motor deficiencies produced by the lesion are irreversible.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/10/20 alle ore 16:07:47