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The primal motivational systems of all mammals are constituted of the evolved affective brain networks that gauge key survival issues. However, since progress in functional neuroscience has historically lagged behind conceptual developments in psychological science, motivational processes have traditionally been anchored to behavioral rather than neural and affective issues. Attempts to retrofit neuroaffective issues onto […]
8 Fifteen?day?old rats were subjected to one of three housing conditions: mother?and?peer (family), peer, and isolation conditions. At 24 days of age, all subjects were rehoused individually. In Experiment 1, play behaviors were monitored in like?raised pairs. Despite their gross lack of social experience, isolation?reared subjects did not exhibit a deficit in frequencies of rough?and?tumble play. […]
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The position advanced in this paper is that the bedrock of emotional feelings is contained within the evolved emotional action apparatus of mammalian brains. This dual-aspect monism approach to brain-mind functions, which asserts that emotional feelings may reflect the neurodynamics of brain systems that generate instinctual emotional behaviors, saves us from various conceptual conundrums. In […]
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Neonatal male rats were either injected subcutaneously with testosterone propionate (TP) or oil vehicle. When weaned, each treated pup was paired with an untreated male sibling. The play fighting of TP?and oil?treated rats were compared at the juvenile phase (30-36 days), and in adulthood (84-90 days). In the juvenile phase, the rate of initiating playful […]
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In several primate species, including humans, embracing predicts the level of affiliation between subjects. To explore the functional meaning of embracing, we selected Theropithecus gelada as a model species. The basic level of the gelada society is the 1-male unit, and the integrity of the group is maintained by the strong bonds between females. In […]
0 
The dorsal immobility response (DIR) is typically seen in the infants of many altricial mammalian species. Lifting the animal into the air by the nape of the neck is the primary releasing stimulus. Functionally, this response appears to facilitate carrying of the infants by the adults. When grasped by the nape and lifted into the […]
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Evolutionary psychiatry emerged from the conceptual successes of sociobiology and evolutionary psychology. It will need to avoid the many mistakes that biology-free Evolutionary Psychology has been prey to. It should not ignore the wealth of information that exists between the phenotypic expression of symptoms and the genotypic sources of core brain/mind processes that are disrupted […]
6 Whether it is that animals are young so that they can play, or whether it is that they play because they are young, play should be more prevalent in species that have a greater degree of postnatal development. This hypothesis is tested by comparative analyses within two mammalian orders (primates and muroid rodents) using independent […]
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Juvenile animals of many species engage in social play, but its functional significance is not well understood. This is especially true for a type of social play called fair play (Fp). Social play often involves behavioral patterns similar to adult behaviors (e.g., fighting, mating, and predatory activities), but young animals often engage in Fp behaviors […]
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Early childhood autism is characterized by deficits in social approach and play behaviors, socio-emotional relatedness, and communication/speech abnormalities, as well as repetitive behaviors. These core neuropsychological features of autism can be modeled in laboratory rats, and the results may be useful for drug discovery and therapeutic development. We review data that show that rats selectively […]
8 The neurobiological rationale for an opiate antagonist pharmacotherapy of autism is presented. Naltrexone efficacy in decreasing autistic behaviour and in increasing social-affiliative behaviour was explored in a 5-year-old autistic boy. Naltrexone (0.5 mg/kg 3 times peer week) was effective in immediately decreasing gross motor activity and stereotyped behaviour and caused a delayed increase of crying, […]
5 
The new paradigm of early childhood allows for the construction of the child as active agents able to comment on their own lives. Historically children have been constructed using divergent discourses as either beings or becomings. More recently they have been seen as complementary and a further temporal state of having been allows for a […]
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Background/aim: Children with autism spectrum disorder (ASD) frequently demonstrate impaired play skills and poor quality social interactions compared to typically developing peers. Complex interventions to improve play skills should be investigated with randomised control trials (RCT) where possible to support evidence-based practice for occupational therapists. Prior to a RCT, multiple feasibility studies are recommended to […]
6 play fighting in rats is most frequent in the juvenile phase (30-40 days), and then wanes following puberty. During the juvenile phase, the most commonly used defensive tactic to block access to the nape (i.e., the play target) is to rotate around the longitudinal axis to supine. From this position of lying on its back, […]
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From weaning until sexual maturity, the rates at which young male rats hold each other supine during play fighting appear to become progressively asymmetrical. These changes have been previously thought to reflect an initial lack of dominance and a later development of dominance?subordinance relationships. In this paper it is shown that pairs of male rats […]
5 
An essential component of youths’ successful development is learning to appropriately respond to emotions, including the ability to recognize, identify, and describe one’s feelings. Such emotional competence is thought to arise through the parent–child relationship. Yet, the mechanisms by which parents transmit emotional competence to their children are difficult to measure because they are often […]
5 
Phenomenology, peekaboo, and play are notions that may not tempt the reader to take a paper very seriously. Phenomenology is a philosophical form of qualitative research that is guided more often by the fortuitous serendipity of contemplative insights than by the rationality of reproducible social science procedures. Peekaboo is an infant game of the eyes […]
4 
Background: The purpose of this study was to measure the impact of interactive technology in the form of mathematical applications (apps) delivered using iPads on kindergarten children’s learning of number sense in a play-based learning environment. Secondly, factors influencing the use of interactive technology in a play-based environment were examined. This technology was introduced to […]
3 
The emotion of anxiety represents one of the most studied topics in the neurosciences, in part due to its relevance for understanding the evolutionary development of the human brain and its role in the pathogenesis of psychopathological conditions. Structural magnetic resonance imaging (sMRI) has enabled mapping of the anxious human brain and has contributed substantially […]
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The authors provide initial documentation that juvenile rats emit short, high-frequency ultrasonic vocalizations (high USVs, ?55 kHz) during rough-and-tumble play. In an observational study, they further observe that these vocalizations both correlate with and predict appetitive components of the play behavioral repertoire. Additional experiments characterized eliciting conditions for high USVs. Without prior play exposure, rats […]
