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Motivational Systems (motivational + system)

Distribution by Scientific Domains

Humanities and Social Sciences	42%
Psychology	28%

Selected Abstracts

Motivational systems and the neural circuitry of maternal behavior in the rat

DEVELOPMENTAL PSYCHOBIOLOGY, Issue 1 2007
Michael Numan
Abstract Jay Rosenblatt's approach-avoidance model of maternal behavior proposes that maternal behavior occurs when the tendency to approach infant stimuli is greater than the tendency to avoid such stimuli. Our research program has uncovered neural circuits which conform to such a model. We present evidence that the medial preoptic area (MPOA: located in the rostral hypothalamus) may regulate maternal responsiveness by depressing antagonistic neural systems which promote withdrawal responses while also activating appetitive neural systems which increase the attractiveness of infant-related stimuli. These MPOA circuits are activated by the hormonal events of late pregnancy. Preoptic efferents may suppress a central aversion system which includes an amygdala to anterior hypothalamic circuit. Preoptic efferents are also shown to interact with components of the mesolimbic dopamine (DA) system to regulate proactive voluntary maternal responses. We make a distinction between specific (MPOA neurons) and nonspecific motivational systems (mesolimbic DA system) in the regulation of maternal responsiveness. © 2006 Wiley Periodicals, Inc. Dev Psychobiol 49: 12,21, 2007. [source]

Is Self-Determined Functioning a Universal Prerequisite for Motive,Goal Congruence?

JOURNAL OF PERSONALITY, Issue 2 2010
Examining the Domain of Achievement in Three Cultures
ABSTRACT Research has shown that capacity for accessing implicit motives promotes congruence between the implicit and the explicit motivational system: Individuals able to test a conscious goal for its fit with their implicit motivation commit themselves more fully to self-congruent goals. However, it has not yet been shown whether this is a universal phenomenon or limited to Euro-American cultures in which individual needs are less strictly constrained by the social environment than in other cultural contexts. Thus, the present study examined whether self-determination interacts with the implicit achievement motive to predict how much importance individuals from Cameroon, Germany, and Hong Kong ascribe to achievement goals. Moreover, the importance ascribed to goals should indirectly predict life satisfaction via success in goal realization. Results showed that the associations described above are valid in all three cultural groups and are discussed in terms of their implications for the universal processes characterizing motivation. [source]

Neurobiological Processes in Adolescent Addictive Disorders

THE AMERICAN JOURNAL ON ADDICTIONS, Issue 1 2008
Ty S. Schepis PhD
The purpose of this review is to summarize the neurobiological factors involved in the etiology of adolescent addiction and present evidence implicating various mechanisms in its development. Adolescents are at heightened risk for experimentation with substances, and early experimentation is associated with higher rates of SUD in adulthood. Both normative (e.g., immature frontal-limbic connections, immature frontal lobe development) and non-normative (e.g., lowered serotonergic function, abnormal hypothalamic-pituitary-adrenal axis function) neurobiological developmental factors can predispose adolescents to a heightened risk for SUD. In addition, a normative imbalance in the adolescent neurobiological motivational system may be caused by the relative underdevelopment of suppressive mechanisms when compared to stimulatory systems. These neurobiological liabilities may correspond to neurobehavioral impairments in decision-making, affiliation with deviant peers and externalizing behavior; these and other cognitive and behavioral traits converge with neurobiological factors to increase SUD risk. The progression to SUD acts as an amplifying feedback loop, where the development of SUD results in reciprocal impairments in neurobehavioral and neurobiological processes. A clearer understanding of adolescent neurobiology is a necessary step in the development of prevention and treatment interventions for adolescent SUD. [source]

Motivational systems and the neural circuitry of maternal behavior in the rat

Estrogen-dependent selectivity of genomic responses to birdsong

EUROPEAN JOURNAL OF NEUROSCIENCE, Issue 6 2006
Donna L. Maney
Abstract Behavioral responses to sociosexual signals often depend on gonadal steroid hormones, which are thought to modulate behavior by acting on motivational systems in the brain. There is mounting evidence that sex steroids may also modulate perception of sociosexual signals by affecting sensory processing. In seasonally breeding songbirds such as the white-throated sparrow (Zonotrichia albicollis), the female's behavioral response to hearing male song depends on her plasma levels of estradiol (E2). Here, we examined whether plasma E2 also affects the selectivity of the song-induced zenk (egr-1) response in the auditory forebrain, which is known to vary according to the behavioral relevance of song stimuli. Non-breeding females were held on a winter-like photoperiod and implanted with silastic capsules containing either no hormone or E2. E2-treated birds hearing 42 min of conspecific song had more cells immunoreactive for the protein product of zenk in the auditory forebrain than did those hearing frequency-matched synthetic tones. In birds not treated with E2, however, the zenk response to song did not differ from that to tones. We found similar effects in the avian homolog of the inferior colliculus, indicating that E2 may affect the processing of auditory information upstream of the forebrain. Our data suggest that in females, zenk induction in the auditory system is selective for song only when plasma E2 exceeds non-breeding levels. E2-dependent plasticity of auditory pathways and processing centres may promote recognition of and attention to conspecific song during the breeding season. [source]

The move from categories to process: Attachment phenomena and clinical evaluation

INFANT MENTAL HEALTH JOURNAL, Issue 4 2004
Arietta Slade
Despite the degree to which attachment theory and research have been embraced by clinicians in recent years, many remain unsure as to what this perspective adds to clinical understanding and psychodynamic thinking about the clinical process. In this article, I outline some ways that developments in the study of attachment have the potential to enrich our clinical work with children and families, and may be particularly illuminating with respect to certain aspects of evaluation, formulation, and diagnosis. This added value comes not from formally assessing patients' attachment classification but from sensitizing clinicians to observing the functioning of the attachment system and to the internal and interpersonal functions of attachment processes. Such awareness on the part of the therapist makes it possible for these dynamic regulatory, defense, and motivational systems to be addressed within the context of evaluation and ongoing psychotherapeutic work. Thinking about attachment processes within the clinical situation does not supplant other aspects of dynamically oriented assessment and evaluation, but rather is theoretically consistent with psychoanalytic models of development and offers new levels of richness and understanding to formulations and treatment planning. [source]

Arousal and attention: Picture size and emotional reactions

PSYCHOPHYSIOLOGY, Issue 5 2007
Maurizio Codispoti
Abstract Building on the assumption that the motivational relevance of an emotional scene depends on contextual factors such as proximity or stimulus size, the present study examined the effects of picture size on emotional perception using autonomic, facial, and subjective reactions. Affective changes were measured while participants viewed pictures presented in small, medium, and large sizes and varying in affective picture content. Whereas affective modulation of heart rate and Corrugator Supercilii muscle activity were not modulated by picture size, emotional modulation of skin conductance was absent for the smallest stimuli and increased linearly for the medium and largest stimulus sizes. Stimulus size modulated sympathetic changes possibly related to activation of the strategic motivational systems and action preparation. In contrast, responses related to orienting, categorization, and communicative functions did not covary with picture size. [source]