Journal of Neuropsychology最新文献

We introduce a special issue of the Journal of Neuropsychology dedicated to a recent paradigm shift in Alzheimer's disease diagnosis. Joint workgroups from the (US) National Institute on Aging and the Alzheimer's Association (NIA-AA) recently issued policy guidelines reclassifying Alzheimer's disease as a biological entity. These guidelines shift the onus of diagnosis in favour of protein biomarkers, relegating cognitive symptoms (e.g. subjective memory and language disorders) as supportive rather than core features. We invited experts in the study of Alzheimer's disease and Related Disorders (ADRDs) to express their views on this paradigmatic shift in dementia management. In this editorial, we synthesize some of the main points advanced in the commentaries. Contributors identified the promise of blood-based biomarker testing for improving equitable detection of dementia in large swathes of the world population. This enthusiasm was tempered by concerns about the biomarker-only diagnostic approach, including the potential for significant harm (e.g. stigma, depression, suicide) caused by labelling asymptomatic older adults who might otherwise never behaviourally express the underlying disease pathology.

This study used fMRI to examine the effect that the abstract-concrete dimension may have on the thematic-taxonomic distinction. The dual hub theory (DHT) posits that left angular gyrus supports thematic relationships and left temporal pole supports taxonomic relationships; however, the DHT is largely based on evidence from concrete words. It is important that theories of semantic organization include abstract words as they are ubiquitous in everyday discourse (Lupyan & Winter, Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences, 2018, 373, 20170137). Additionally, there is reason to believe that there may bean interaction between the abstract-concrete dimension and the thematic-taxonomic distinction, based on the different representational frameworks (DRF) hypothesis, which posits that abstract concepts are primarily organized by association/theme, and that concrete concepts are primarily organized by similarity/taxonomy. However, there appears to be a mismatch among the DHT, predictions of the DRF hypothesis for brain activation, and existing neuroimaging data for the concreteness effect. Thus, we sought to include abstract words in a test of the DHT and determine whether any interactions exist between the abstract-concrete dimension and the thematic-taxonomic distinction. While we replicated the localization of abstract and concrete word processing, we did not extend the DHT to include abstract words, nor did we find an interaction that would support the DRF hypothesis. Rather, our results align more closely with the hub-and-spoke model (Patterson et al., Nature Reviews Neuroscience, 2007, 8, 976).

Transcranial electrical stimulation (tES) holds promise for neuropsychological rehabilitation by leveraging the brain's inherent plasticity to enhance cognitive and motor functions. However, early results have been variable due to oversimplified approaches. This manuscript explores the potential and complexities of tES, particularly focusing on a protocol defined transcranial direct current stimulation as a reference model for all tES protocols, emphasising the need for precision in tailoring stimulation parameters to individual characteristics. By integrating intrinsic (i.e. the neuro-physiological system state) and extrinsic factors (i.e. experimental set up), highlighting the critical role of state-dependent effects and the synergy with cognitive tasks, we aim to refine tES protocols. This approach not only addresses the complexity of the brain system (as defined by its current state) but also highlights the importance of collaborative research and data sharing to understand the underlying mechanisms of tES-induced changes and optimising therapeutic efficacy. Emphasising the integration of tES with targeted tasks and clearer hypotheses, this work underscores the potential for more effective neurorehabilitation strategies.

This case report presents new semantic learning and long-term retention data collected over a 5-year period from an amnesic adolescent boy, CJ. Compared to his younger sister, a novel abbreviation-learning task captured CJ's slower semantic acquisition across three weekly training sessions. By contrast, his rate of forgetting between sessions was comparable to that of the control's and was slower over long delays of up to 5 years but recalled information without any reliable report of the original learning context.

We present a patient with left mesial temporal medically refractory epilepsy who developed new onset abnormal eating behaviour following surgical ablation of the left hippocampus and amygdala. The patient underwent a second ablation due to seizure recurrence targeting a remnant of the amygdala, after which seizures resolved, but disordered eating behaviours continued with no appreciable change. We discuss the role of aberrant limbic signalling in mesial temporal epilepsy and its contribution towards eating behaviours in the context of surgical treatment.

We standardized a new version of the Digit span test and the first version of the Bisyllabic non-word span test, both measuring the phonological loop, in an Italian sample of neurologically healthy adults (n = 225). All stimuli were administered to the participants through a computerized procedure to avoid the influence of the examiner on participants' performance. We used a preliminary test to exclude the presence of sensory-perceptual and articulatory-motor difficulties that might have influenced the results. The results revealed that both Age and Education were significant predictors of participants' performance on the Digit span test. By contrast, only Age predicted significantly participants' performance on the Bisyllabic non-word span test. The average Digit span was approximately twice as large as the average Bisyllabic non-word span, suggesting that the latter might be a strategy-free measure of the phonological loop. The Bisyllabic non-word span is an innovative and specific measure for identifying phonological short-term memory deficits. For all tests, adjusted and equivalent scores are provided to facilitate results interpretation and clinical applicability.

The aim of this research was to analyse the reliability and validity of the Computerised Battery for Neuropsychological Evaluation of Children (BENCI) in a Cuban population of children and adolescents. The study involved 1714 Cuban students between the ages of 6 and 18 who were divided into three groups according to their level of education (Elementary: 6–11 years old; High School: 12–14 years old; and Pre-University: 15–18 years old). All participants were evaluated using the BENCI with some also undergoing additional neuropsychological testing. The BENCI evaluates the following cognitive domains: processing speed, visuomotor coordination, attention, memory, language, and executive functions. The results showed that the BENCI has good test–retest reliability indices and high internal consistency values in Reasoning, Reaction Time, and Working Memory. In terms of validity, the data revealed significant correlations between the BENCI tests and other neuropsychological tests assessing similar cognitive functions. The BENCI also has discriminative validity, as it was found that performance on the tests varies according to the level of education of those being evaluated. In terms of construct validity, confirmatory factor analysis showed that the fit indices for the executive functions dimension of the BENCI are adequate. The data show that the BENCI is a reliable and valid instrument for assessing neurodevelopment in Cuban children and adolescents. Since this is the first neuropsychological test of its kind to be validated in the Cuban population, this finding is of particular importance.

There is emerging evidence of social cognitive impairments in bipolar disorders (BD). Less evident is the question if social cognitive impairments are predictive of psychosocial functioning, independently of neurocognitive impairment. The aims of the study were to investigate if patients with BD-I showed impairments in facial emotion recognition and alterations in affective empathy, in relation to healthy controls, and if these impairments would predict psychosocial functioning, after accounting for neurocognitive impairments. Thirty-seven patients diagnosed with BD-I, in an euthymic state, and 37 matched healthy controls underwent an assessment including a facial recognition test (ERT) and a self-report scale of affective empathy (BEES). Patients additionally underwent an extensive neuropsychological assessment consisting of traditional tests. Patients with BD-I were significantly less able to recognize the emotion fear compared to healthy controls. However, the lower ability to recognize fear did not predict psychosocial functioning. In addition, it was not related to any of the other neuropsychological variables. The degree of self-reported empathy did not differ between patients and healthy controls. The results add to the evidence of a specific deficit in recognizing fear in BD-I; however, a link with psychosocial functioning was lacking. It is possible that the ability to recognize fear is related to a more narrow concept of interpersonal functioning than to the broad concept of psychosocial functioning. Future research should be directed towards aspects of social functioning in relation to social cognitive impairments, while taking account of subgroups of social cognitive functioning.

Attention deficit hyperactivity disorder (ADHD) is associated with diverse cognitive deficits of which problems related to memory and learning are well-established but poorly understood. In an online experiment, we studied whether verbal memory impairment in adult ADHD is related to differences in spontaneous use of memory strategies that hinge upon metacognitive and executive skills. Eighty-one ADHD adults and 209 neurotypical controls performed a Word List Learning task where the same words were presented three times, each time coupled with an open strategy report. Bayesian analyses indicated that the ADHD group recalled less words, did not differ from controls in efficacy of strategy use, but exhibited more limited strategy use than the controls. This suggests that less versatile strategy employment, possibly related to core executive deficits, may play a role in verbal memory impairment in adults with ADHD. Concerning treatment implications, future research could probe to what extent external strategy instruction might increase the versatility of mnemonic strategy use in adult ADHD, and thereby partly compensate for their verbal memory deficits.