Abstract：
:Male rats both eat more and weigh more than females. Differences in food intake and body weight result, at least partly, from differences in gonadal hormone secretions. The present experiments were designed to investigate whether sex differences in food motivation might contribute to the behavioral differences observed when food-deprived male and female rats are exposed to appetitively motivated operant learning tasks. Male and female Wistar rats were exposed to different progressive ratio schedules of reinforcement which have been shown to generate reliable indices of 'motivational' conditions. In progressive ratio schedules, subjects are required to make a systematically increasing number of responses for each successive reinforcer, until the requirement becomes so large that the subjects stop responding. Expt. Ia was designed to investigate whether or not food-deprived males would be more motivated than food-deprived females to obtain food. Expt. Ib investigated whether gonadectomy might differentially affect food motivation of male and female rats exposed to a progressive ratio schedule of reinforcement. Motivational differences between males and females were not observed. Males and females obtained an equal number of reinforcers, while differences in the total number of responses and response rate were not observed. Gonadectomy did not affect the total number of responses in the final completed ratio. The results of the present experiments do therefore not support the hypothesis that sex differences in food motivation might underlie sex differences in behavior when food-deprived male and female rats are exposed to operant schedules of positive reinforcement.
journal_name
Behav Brain Resjournal_title
Behavioural brain researchauthors
van Hest A,van Haaren F,van de Poll NEdoi
10.1016/0166-4328(88)90118-0subject
Has Abstractpub_date
1988-03-01 00:00:00pages
215-21issue
3eissn
0166-4328issn
1872-7549pii
0166-4328(88)90118-0journal_volume
27pub_type
杂志文章abstract：:The aim of the present study was to investigate whether neonatal odor experience associated with the mother affects food avoidance learning and basolateral amygdala (BLA) involvement in adulthood. Odorization of mother's nipples with banana or almond solutions from birth to weaning resulted in an impairment at adultho...
journal_title：Behavioural brain research
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journal_title：Behavioural brain research
pub_type： 杂志文章
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pub_type： 杂志文章,评审
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journal_title：Behavioural brain research
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journal_title：Behavioural brain research
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pub_type： 杂志文章,评审
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journal_title：Behavioural brain research
pub_type： 杂志文章
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更新日期：2004-12-06 00:00:00
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journal_title：Behavioural brain research
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journal_title：Behavioural brain research
pub_type： 杂志文章
doi：10.1016/j.bbr.2008.01.007
更新日期：2008-06-03 00:00:00
abstract：:We examined four different learning and memory tasks in rats which had been subjected to left carotid artery ligation followed by 2 h hypoxia (8% oxygen) when they were 7 days old. The examination began on the 4th week after insult and continued to 18 weeks post-insult. Compared with the control group, the hypoxic-isc...
journal_title：Behavioural brain research
pub_type： 杂志文章
doi：10.1016/s0166-4328(00)00287-4
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