We investigate a 3+1 dimensional toy model that exhibits spontaneous breakdown of chiral symmetry, both in a lightfront (LF) Hamiltonian and in a Euclidean Schwinger-Dyson (SD) formulation. We show that both formulations are completely equivalent — provided the renormalization is properly done. For the model considered, this means that if one uses the same transverse momentum cutoff on the SD a...

Purpose Measures of heart rate variability (HRV) and respiratory sinus arrhythmia (RSA), which are the healthy fluctuations in heart rate that reflect autonomic influences on cardiac activity, have been proposed as indicators of physical and psychological health. Previous studies suggest that HRV increases during some meditative states, but it is not clear how autonomic tone is affected either ...

Dietary fat affects appetite and appetite-related peptides in birds and mammals; however, the effect of dietary fat on appetite is still unclear in chickens faced with different energy statuses. Two experiments were conducted to investigate the effects of dietary fat on food intake and hypothalamic neuropeptides in chickens subjected to two feeding states or two diets. In Experiment 1, chickens...

Background. Musicians’ sympathetic arousal needed to deal with an extraordinary event (e.g., a demanding concert) can become a neurophysiological alteration known as Musical Performance Anxiety, an important health problem. Objectives. This study aimed to find whether high-intensity interval training (HIIT) might reduce the anxiety in musicians after acute training. Methods. Ten young wind in...

lactoferrin (lf) is an iron-binding multi-functional glycoprotein which has numerous physiological functions such as iron transportation, anti-microbial activity and immune response. in this study, different in silico approaches were exploited to investigate lf protein properties in a number of mammalian species. results showed that the iron-binding site, dna and rna-binding sites, signal pepti...

Prolactin (PRL) acts through the long form (LF) of the human PRL receptor (hPRLR) to cause differentiation of mammary epithelial cells through activation of the Janus kinase-2 (JAK2)/signal transducer and activator of transcription 5 (STAT5) pathway and subsequent transcriptional events. To determine whether the inhibitory action of hPRLR short forms (SFs; S1a and S1b) on PRL-induced signal tra...

The present study focuses on the functional interactions of cognition and manual action control. Particularly, we investigated the neurophysiological correlates of the dual-task costs of a manual-motor task (requiring grasping an object, holding it, and subsequently placing it on a target) for working memory (WM) domains (verbal and visuospatial) and processes (encoding and retrieval). Thirty p...