Objective: To investigate, using functional magnetic resonance imaging (fMRI) techniques, the immediate and sustained effects of acupuncture on functional connectivity (FC) within the default mode network (DMN) and external FC. Methods: Thirty healthy participants received acupuncture needle stimulation at Baihui (GV20) and Yintang (GV29) and underwent resting-state fMRI scans in three phases:...
I welcome the excellent paper by Guimarães et al. which extends research on nitrous oxide (N2O) in neuropsychiatry – a neglected field, since our initial work in 1982 and then 1985 indicating that low, anxiolytic, and non-anaesthetic doses of N2O ameliorate depression. 3 Research has demonstrated that N2O, at subanaesthetic concentrations acts on opioid receptors. We therefore concluded that...
OBJECTIVE: To describe the recreational use of benzydamine, an anti-inflammatory drug, among street youth in Brazil. METHOD: Design: a descriptive, cross sectional survey. Setting: 93 welfare services for the street youth in 27 Brazilian capitals. Participants: 2807 street youth, 10 to 18 years old. Main outcome measures: demographic characteristics, drug use pattern (lifetime use, use in the...
This text reviews the generic aspects of the central nervous system evolutionary development, emphasizing the developmental features of the brain structures related with behavior and with the cognitive functions that finally characterized the human being. Over the limbic structures that with the advent of mammals were developed on the top of the primitive nervous system of their ancestrals, the...