Working memory in middle-aged males: age related brain activation changes and cognitive fatigue effects

We examined the effects of aging and cognitive fatigue on working memory (WM) related brain activation using functional magnetic resonance imaging. Age-related differences were investigated in 13 young and 16 middle-aged male school teachers. Cognitive fatigue was induced by sustained performance on cognitively demanding tasks (compared to a control condition). Results showed a main effect of age on left dorsolateral prefrontal and superior parietal cortex activation during WM encoding; greater activation was evident in middle-aged than young adults regardless of WM load or fatigue condition. An interaction effect was found in the dorsomedial prefrontal cortex (DMPFC); WM load-dependent activation was elevated in middle-aged compared to young in the control condition, but did not differ in the fatigue condition due to a reduction in activation in middle-aged in contrast to an increase in activation in the young group. These findings demonstrate age-related activation differences and differential effects of fatigue on activation in young and middle-aged adults. © 2013 Elsevier B.V

Barriers and facilitators on the pathway to mental health care among 12-25 year olds

PURPOSE: The mismatch between the number of young people that require mental health care and who actually receive it, questions access to care. This study aims to gain in-depth understanding of barriers and facilitators in the pathway to mental health care among 12 to 25 year olds as experienced by visitors of youth walk-in centres of the Dutch @ease Foundation. METHODS: Open interviews were conducted to explore participants’ experiences and attitudes towards mental health care. Following inductive thematic analysis, barriers and facilitators in participants’ pathways towards care were described. RESULTS: Fifteen participants were included, heterogenic with regard to age, sex and nationality. Three main themes in the process of seeking help were ‘attitudes towards mental health problems and seeking help’, ‘entrance to care’ and ‘in care itself’. A fourth theme consisted of suggestions for improvement. CONCLUSION: Negative attitudes towards mental health problems make young people to only seek help when problems begin to escalate. The lack of knowledge about mental health problems, treatment options and costs asks for more awareness and clear information. Updates about waiting lists and alternative options, informal settings with walk-in options and personalized care are feasible and crucial improvements to decrease the individual and societal burden

Cortisol and induced cognitive fatigue: effects on memory activation in healthy males

We investigated the relationship between individual differences in acute fatigue and endogenous cor- tisol changes elicited by the sustained performance of cognitively demanding tasks (fatigue condition). Healthy males provided salivary cortisol measurements and subjective fatigue ratings, and were scanned (functional magnetic resonance imaging) during memory encoding and recognition tasks in fatigue and control conditions. A group of 15 ‘responders’ showed significantly higher cortisol levels in the fatigue condition than 12 ‘non-responders’. Responders showed higher subjective fatigue and reduced encod- ing and recognition activation than non-responders in the fatigue condition. An interaction in activation changes in the right hippocampus during encoding reflected decreased activation in responders, but somewhat increased activation in non-responders in the fatigue compared to control condition. More- over, decreased hippocampal activation in responders was associated with increased subjective fatigue. Findings are consistent with a central role for the hippocampus in differences between responders and non-responders and also implicate the right hippocampus in individual differences in induced cognitive fatigue effects