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Neurotransmitters and Learning, Memory and …

Hypothalamic–pituitary–adrenal axis - Wikipedia

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Brains Do It: Lust, Attraction, and Attachment

AB - In this review we present data summarizing our studies concerning the mechanism of action for the behavioral effects of peripheral arginine vasopressin (AVP) administration. We have demonstrated a clear performance improvement in a one trial appetitive task designed to measure the memory-learning process. This behavioral effect is blocked by peptide analogs which block the pressor response to AVP. From these data, and from other data obtained in aversively motivated tasks, we hypothesize that peripheral AVP injections induce effects of physiological-endocrinological origin and that these peripheral signals (e.g. vasopressor actions) alert and arouse the animal, thus helping to improve its association of environmental events. This hypothesis is similar to that proposed by others regarding peripheral hormones and memory and still leaves open the possibility that vasopressin in the brain acts independently of the above proposed action for peripherally derived vasopressin.

Brains Do It: Lust, Attraction, and Attachment By: Helen E

N2 - The effect of 1 and 5 μg AVP injections on open field and photoactivity chamber behavior of D.I. and normal Long-Evans animals was studied. Administration of 5 μg AVP (SC) resulted in a statistically significant depression of both open field and photochamber activity in the D.I. rat, but had a less pronounced effect on normal animals. However, 1 μg AVP resulted in only minor alterations of activity in both D.I. and normal animals. In terms of learned behavior, D.I. and normal animals displayed similar within-session habituation when comparisons were made following the same treatment conditions. Thus, this study supports the hypothesis that vasopressin may influence memory tasks by modulation of related states of emotionality, motivation, and/or attention rather than by direct involvement in the retrieval and/or consolidation of information.

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In this review we present data summarizing our studies concerning the mechanism of action for the behavioral effects of peripheral arginine vasopressin (AVP) administration. We have demonstrated a clear performance improvement in a one trial appetitive task designed to measure the memory-learning process. This behavioral effect is blocked by peptide analogs which block the pressor response to AVP. From these data, and from other data obtained in aversively motivated tasks, we hypothesize that peripheral AVP injections induce effects of physiological-endocrinological origin and that these peripheral signals (e.g. vasopressor actions) alert and arouse the animal, thus helping to improve its association of environmental events. This hypothesis is similar to that proposed by others regarding peripheral hormones and memory and still leaves open the possibility that vasopressin in the brain acts independently of the above proposed action for peripherally derived vasopressin.

AB - The effect of 1 and 5 μg AVP injections on open field and photoactivity chamber behavior of D.I. and normal Long-Evans animals was studied. Administration of 5 μg AVP (SC) resulted in a statistically significant depression of both open field and photochamber activity in the D.I. rat, but had a less pronounced effect on normal animals. However, 1 μg AVP resulted in only minor alterations of activity in both D.I. and normal animals. In terms of learned behavior, D.I. and normal animals displayed similar within-session habituation when comparisons were made following the same treatment conditions. Thus, this study supports the hypothesis that vasopressin may influence memory tasks by modulation of related states of emotionality, motivation, and/or attention rather than by direct involvement in the retrieval and/or consolidation of information.

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The effect of 1 and 5 μg AVP injections on open field and photoactivity chamber behavior of D.I. and normal Long-Evans animals was studied. Administration of 5 μg AVP (SC) resulted in a statistically significant depression of both open field and photochamber activity in the D.I. rat, but had a less pronounced effect on normal animals. However, 1 μg AVP resulted in only minor alterations of activity in both D.I. and normal animals. In terms of learned behavior, D.I. and normal animals displayed similar within-session habituation when comparisons were made following the same treatment conditions. Thus, this study supports the hypothesis that vasopressin may influence memory tasks by modulation of related states of emotionality, motivation, and/or attention rather than by direct involvement in the retrieval and/or consolidation of information.

N2 - In this review we present data summarizing our studies concerning the mechanism of action for the behavioral effects of peripheral arginine vasopressin (AVP) administration. We have demonstrated a clear performance improvement in a one trial appetitive task designed to measure the memory-learning process. This behavioral effect is blocked by peptide analogs which block the pressor response to AVP. From these data, and from other data obtained in aversively motivated tasks, we hypothesize that peripheral AVP injections induce effects of physiological-endocrinological origin and that these peripheral signals (e.g. vasopressor actions) alert and arouse the animal, thus helping to improve its association of environmental events. This hypothesis is similar to that proposed by others regarding peripheral hormones and memory and still leaves open the possibility that vasopressin in the brain acts independently of the above proposed action for peripherally derived vasopressin.

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Behavioral Roles of Oxytocin and Vasopressin | …

This hypothesis is similar to that proposed by others regarding peripheral hormones and memory and still leaves open the possibility that vasopressin in the brain acts independently of the above proposed action for peripherally derived vasopressin.

Photographic Memory: Nootropics and Mnemonic ..

Evidence for this comes from experimental studies in several species, which indicate that the precise distribution of vasopressin and vasopressin receptors in the brain is associated with species-typical patterns of social behavior. In particular, there are consistent differences between monogamous species and promiscuous species in the distribution of AVP receptors, and sometimes in the distribution of vasopressin-containing axons, even when closely-related species are compared. Moreover, studies involving either injecting AVP agonists into the brain or blocking the actions of AVP support the hypothesis that vasopressin is involved in aggression towards other males. There is also evidence that differences in the AVP receptor gene between individual members of a species might be predictive of differences in social behavior. One study has suggested that genetic variation in male humans effects pair-bonding behavior. The brain of males uses vasopressin as a reward for forming lasting bonds with a mate, and men with one or two of the genetic alleles are more likely to experience marital discord. The partners of the men with two of the alleles affecting vasopressin reception state disappointing levels of satisfaction, affection, and cohesion. Vasopressin receptors distributed along the reward circuit pathway, to be specific in the ventral pallidum, are activated when AVP is released during social interactions such as mating, in monogamous prairie voles. The activation of the reward circuitry reinforces this behavior, leading to conditioned partner preference, and thereby initiates the formation of a pair bond.

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