Attention deficit in primary-school-age children with attention deficit hyperactivity disorder measured with the attention network test: a systematic review and meta-analysis

Objective: To review and meta-analyze patterns of attention deficit in primary-school-age children with ADHD measured with the neuropsychological attention network test (ANT). Methods: Six electronic databases were searched to 5.05.2022. Selection criteria included prospective cohort and intervention studies; ANT used; primary-school-age; diagnosis of ADHD/at high risk. Results: Seven studies met inclusion criteria (N = 3,826). Compared with controls, children with ADHD had higher scores for Reaction Time (Hedges’ g = 0.433; 95% CI: 0.135–0.731), Reaction Time Variability (Hedges’ g = 0.334; 95% CI: 0.012–0.657), and Alerting Network (Hedges’ g = 0.235; 95% CI: 0.021–0.449) while children at high risk had higher Alerting Network scores (Hedges’ g = 0.176; 95% CI: 0.003–0.349) and Correctness scores (Hedges’ g = 1.956; 95% CI: 0.020–3.892). Conclusions: Children with ADHD and at risk of ADHD had different ANT results from children without ADHD only for the alerting network. There were no significant differences for executive and orienting outcomes. Children at risk of ADHD also made more errors (commission and omission) measured with the ANT compared with children without ADHD. Reaction time was longer and reaction time variability higher in children with ADHD than in children without ADHD, and in children at risk of ADHD compared with children without ADHD.publishedVersio

Contrasting prefrontal cortex contributions to episodic memory dysfunction in behavioural variant frontotemporal dementia and alzheimer's disease

Recent evidence has questioned the integrity of episodic memory in behavioural variant frontotemporal dementia (bvFTD), where recall performance is impaired to the same extent as in Alzheimer's disease (AD). While these deficits appear to be mediated by divergent patterns of brain atrophy, there is evidence to suggest that certain prefrontal regions are implicated across both patient groups. In this study we sought to further elucidate the dorsolateral (DLPFC) and ventromedial (VMPFC) prefrontal contributions to episodic memory impairment in bvFTD and AD. Performance on episodic memory tasks and neuropsychological measures typically tapping into either DLPFC or VMPFC functions was assessed in 22 bvFTD, 32 AD patients and 35 age- and education-matched controls. Behaviourally, patient groups did not differ on measures of episodic memory recall or DLPFC-mediated executive functions. BvFTD patients were significantly more impaired on measures of VMPFC-mediated executive functions. Composite measures of the recall, DLPFC and VMPFC task scores were covaried against the T1 MRI scans of all participants to identify regions of atrophy correlating with performance on these tasks. Imaging analysis showed that impaired recall performance is associated with divergent patterns of PFC atrophy in bvFTD and AD. Whereas in bvFTD, PFC atrophy covariates for recall encompassed both DLPFC and VMPFC regions, only the DLPFC was implicated in AD. Our results suggest that episodic memory deficits in bvFTD and AD are underpinned by divergent prefrontal mechanisms. Moreover, we argue that these differences are not adequately captured by existing neuropsychological measures

Otępienie czołowo-skroniowe : ujęcie interdyscyplinarne

Publikacja recenzowana / Peer-reviewed publicationZe wstępu: Oddajemy do rąk Czytelników monografię Otępienie czołowo-skroniowe: ujęcie interdyscyplinarne, która stanowi oryginalny zbiór odpowiednio dobranych rozdziałów, opracowanych przez autorów z różnych specjalności medycznych i paramedycznych zajmujących się diagnozą i rehabilitacją osób z otępieniem. Otępienie czołowo-skroniowe stanowi nadzwyczaj ważki i trudny temat dla współczesnej neuronauki. Temat jest ważki przede wszystkim dlatego, że problemy związane z otępieniem w starszych latach dotyczą wciąż wzrastającej liczby osób, co stanowi nieunikniony, choć dość paradoksalny skutek przedłużenia się życia przeciętnego człowieka, bez proporcjonalnej poprawy jego kondycji fizycznej i psychicznej. Oznacza to m.in., że najprawdopodobniej mało kto z nas (tj. sami autorzy wraz z Czytelnikami) uniknie tego problemu w przyszłości, a ten dość przykry fakt czasami utrudnia proces utrzymywania należytego dystansu naukowego do tematu. Wiele rozdziałów publikowanych w tej książce jest owocem 13. Międzynarodowego Kongresu Polskiego Towarzystwa Neuropsychologicznego, zorganizowanego przez Krakowską Akademię im. Andrzeja Frycza Modrzewskiego w dniach 22 do 24 lutego 2010 roku. Uczestnicy kongresu podjęli panelową dyskusję, mającą na celu syntezę przyczyn i objawów otępienia czołowo-skroniowego. Główne tezy z tej dyskusji wykorzystano również w przygotowywaniu rozdziałów tej monografii

“Keep up the good work!”: A case study of the effects of a specific cognitive training in Alzheimer’s disease

Alzheimer's disease (AD) is a neurodegenerative condition characterized by significant impairment in multiple cognitive domains. In recent years, the development of cognitive trainings in AD has received significant attention. In the present case study we designed a cognitive training program (GEO, Geographical Exercises for cognitive Optimization) based on an errorless paradigm and tailored to the patient's cultural interests. The aim of this training was to investigate the potential for acquiring and possibly retaining both procedural and verbal knowledge in early-stage AD. This study involved an 80-year-old female patient diagnosed with early-stage AD, and 10 matched healthy subjects. Participants were asked to perform the two GEO training tasks: a "puzzle-like" task for procedural memory, and an "association" task for verbal memory. Both the patient and the healthy controls were subsequently trained with GEO using the same two tasks for 2 months. Although the patient's performance before training in both tasks was poor compared to healthy controls, after the training these differences disappeared. Our results showed that the patient was able to acquire new procedural abilities and verbal knowledge, and that her achievements were stable at the follow-up testing scheduled 3 months after the end of the intervention. This case study suggests a potentially useful strategy for cognitive training in AD. </p

Original article Impulsive antisociality and executive control problems: evidence from go/no-go and stop-signal tasks

Background People with impulsive-antisocial traits may engage in unplanned behaviors that reduce their efficiency and may even result in harm to self and others. The present study aimed to investigate the relationship between executive control functions and impulsive antisociality, as assessed with the Psychopathic Personality Inventory (PPI). Using go/no-go and stop-signal paradigms, we examined whether healthy participants with high impulsive-antisocial traits would show delayed response inhibition and error monitoring deficits when compared to those reporting low levels of impulsive antisociality. Participants and procedure A total of 26 participants were recruited from different Warsaw universities based on the Impulsive Antisociality subscale scores of the PPI. Subjects scoring in the first quartile were assigned to the low and those with a score in the fourth quartile were selected for the high impulsivity group. All participants were tested with go/no-go and stop-signal tasks that were executed in a random order. Results Higher levels of impulsive-antisocial traits were associated with poorer executive control. In particular, high impulsive-antisocial individuals demonstrated reduced post-error slowing in response to go stimuli following an error and took longer to respond to the stop signal than the control group. The two groups did not differ in their performance accuracy. Conclusions The study extends previous findings regarding the relationship between impulsivity and executive control showing that non-clinical impulsive antisociality results in decreased conflict detection ability and delayed response inhibition. These problems may result in reduced executive effectiveness in everyday life situations