Ultrasonic vocalizations as indices of affective states in rats

Adult rats spontaneously vocalize in ultrasonic frequencies. Although these ultrasonic vocalizations (USVs) have been described as by-products of locomotor activity or social signals, accumulating evidence suggests that they may also index anticipatory affective states. Converging ethological, pharmacological, and brain stimulation research indicates that whereas long low-frequency (> 0.3-s, approximately 22-kHz) USVs occur during anticipation of punishment or avoidance behavior, short, high-frequency (< 0.3-s, approximately 50-kHz) USVs typically occur during anticipation of reward or approach behavior. Thus, long 22-kHz USVs may index a state of negative activation, whereas short, 50-kHz USVs may instead index a state of positive activation. This hypothesis has theoretical implications for understanding the brain circuitry underlying mammalian affective states and clinical applicability for modeling hedonic properties of different psychotropic compounds.     

Neuro-Evolutionary Foundations of Infant Minds: From Psychoanalytic Visions of How Primal Emotions Guide Constructions of Human Minds toward Affective Neuroscientific Understanding of Emotions and Their Disorders

ABSTRACT

As Louis Sander understood, human infants are evolutionarily endowed with emotional minds that allow them to experience themselves as affectively vibrant creatures, who seek to be recognized as important players in the world. If so recognized, they experience themselves as positive individuals; if merely neglected as predetermined beings whose affects and intentions do not matter in the long-term construction of their minds, paths toward adult disturbance are paved. The neuroscience of affective processes has been substantively advancing through the use of animal models where the needed detailed experimental work can be conducted. Critical neural networks and neuro-epigenetic brain changes are being documented that provide neuroscientific confirmations for the insights advanced by Sander and his many colleagues. Here we show how the deeply intersubjective, flexible nature of the mother-infant relationship is firmly expressed in the underlying biology of the basic limbic emotional systems. Rather than being deterministic, hard-wired affective switches, these emotional systems (e.g., CARE, PLAY, PANIC, SEEKING, RAGE, FEAR, and LUST) are modulated by (and, in turn, modify) the developing relationship between mother and infant. Thus, the nature-nurture debate can be meaningfully reconceptualized as a bio-psycho-social interactive model, in which biology shapes relationships, which, in turn, shape and sometimes radically modify the biology.     

National Identity and Attitude Toward Foreigners in a Multinational State: A Replication

An analysis of the 1995 Belgian General Election Survey indicates that the bipolar national identity variable, which contrasts citizens who identify exclusively with the Belgian nation with those who identify exclusively with the Flemish or Walloon subnation, measures not only the direction but also the intensity of national feelings. Respondents who are located at the middle of the scale tend to have a weak identification with both the nation and the subnation. On the basis of a structural equations modeling approach involving a test of the construct equivalence in the two regions and a control for agreeing-response bias, it is shown that the bipolar national identity variable and attitude toward foreigners are inversely related in Flanders and Wallonia. In Flanders, citizens with a strong subnational identification tend to have a negative attitude toward foreigners; those with a strong Belgian identification are more positive. This relationship became more pronounced after controlling for the respondents' level of education. In Wallonia, a reverse but less pronounced relationship was found. These findings support the hypothesis that the relationship between the variables of national identity and attitude toward foreigners is not intrinsic, but is at least partly determined by the social representation of the nation.