Social housing is recommended for laboratory rats because they are highly social mammals but research constraints or medical issues often demand individual housing and, when
Background The present study investigated individual differences in the Affective Neuroscience Personality Scales (ANPS), representing measures of primary emotional systems, and depressive tendencies in two
Based on an interdisciplinary perspective, we discuss how primary-process, anoetic forms of consciousness emerge into higher forms of awareness such as knowledge-based episodic knowing and
In adolescent rats, 50-kHz vocalizations are most evident during tickling and rough-and-tumble play. The following experiments evaluated whether 50-kHz vocalizations reflect positive social affect by
A challenge for social-affective neuroscience programs is to identify simple and yet valid animal models for studying the expression of basic social emotions and their
Rats (Rattus norvegicus) emit a variety of ultrasonic vocalizations throughout their lifespan that reflect different forms of emotional arousal and accompanying affective states. In this
Octodon degus is a social caviomorph species that exhibits strong social bonds and robust distress responses to maternal separation. To understand the impact of early
There has been a perennial debate about whether aggression is learned or innate. The power of extreme arguments in this area has diminished as all
Stress facilitates development of addictive behaviors in part by stress-induced increase in the strength of glutamatergic synapses at dopamine (DA) neurons within the ventral tegmental
Objective Preclinical models of human mood disorders commonly focus on the study of negative affectivity, without comparably stressing the role of positive affects and their
Brain cholecystokinin (CCK) levels have been shown to be elevated in animals defeated during adult social aggression. The present experiment evaluated whether similar effects are
Effortful control (EC) refers to the ability to inhibit a dominant response to perform a subdominant one and has been shown as protective against a
Primary-process experiences, both raw affects and perceptions, are self-creating processes, and the associated motoric-action tendencies serve survival values, providing the raw materials for learning. Actions
Handling of laboratory rats can increase physiological and emotional stress, leading to a fearful relationship with humans. We hypothesized that the affective quality of handling
The aim of the current study was to investigate basic emotions and attachment in a sample of 86 stroke patients. We included a control group
Free play, in which children develop their own activities, including rough-and-tumble activities that, as the term play implies, involves physical activity such as running, jumping,
A series of experiments was conducted to determine the extent to which somatosensory stimulation is necessary for the elaboration of juvenile play in rats. Anesthetization
The ability of positive affective states to counteract negative states engendered by routine medical procedures remains poorly studied. In laboratory rats, positive affect typically associated
Play behavior was assessed in juvenile rat pups following chronic administration of scopolamine (0.5 or 1.0 mg/kg, i.p.) to one partner in each dyad of
The proconvulsant compound trimethylolpropane phosphate (TMPP) was evaluated for its effects on motor, social, and emotional behaviors. Long Evans rats were treated prenatally for 13
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