Phonological and Semantic Fluency in Alzheimer's Disease: A Systematic Review and Meta-Analysis.

BACKGROUND: Semantic and Phonological fluency (SF and PF) are routinely evaluated in patients with Alzheimer's disease (AD). There are disagreements in the literature regarding which fluency task is more affected while developing AD. Most studies focus on SF assessment, given its connection with the temporoparietal amnesic system. PF is less reported, it is related to working memory, which is also impaired in probable and diagnosed AD. Differentiating between performance on these tasks might be informative in early AD diagnosis, providing an accurate linguistic profile. OBJECTIVE: Compare SF and PF performance in healthy volunteers, volunteers with probable AD, and patients with AD diagnosis, considering the heterogeneity of age, gender, and educational level variables. METHODS: A total of 8 studies were included for meta-analysis, reaching a sample size of 1,270 individuals (568 patients diagnosed with AD, 340 with probable AD diagnosis, and 362 healthy volunteers). RESULTS: The three groups consistently performed better on SF than PF. When progressing to a diagnosis of AD, we observed a significant difference in SF and PF performance across our 3 groups of interest (p = 0.04). The age variable explained a proportion of this difference in task performance across the groups, and as age increases, both tasks equally worsen. CONCLUSION: The performance of SF and PF might play a differential role in early AD diagnosis. These tasks rely on partially different neural bases of language processing. They are thus worth exploring independently in diagnosing normal aging and its transition to pathological stages, including probable and diagnosed AD.

Effects of the Practice of Movement Representation Techniques in People Undergoing Knee and Hip Arthroplasty: A Systematic Review.

OBJECTIVE: To analyze the effects of movement representation techniques (MRT) combined with conventional physical therapy (CFT) in people undergoing knee and hip arthroplasty compared to conventional physical therapy alone in terms of results in physical and functionality variables, cognitive function, and quality of life. METHODOLOGY: the review was carried out according to the criteria of the PRISMA statement, considering studies in the electronic databases PubMed/Medline, Pubmed Central/Medline, Web of Science, EBSCO, and ScienceDirect. RESULTS: MRT plus CFT generated therapeutic effects in some aspects of the physical variables: 100% pain (7 of 7 studies); 100% strength (5 out of 5 studies); range of motion 87.5% (7 out of 8 studies); 100% speed (1 of 1 study), functional variables: 100% gait (7 of 7 studies); functional capacity 87.5% (7 out of 8 studies); cognitive variables: 100% motor visualization ability (2 out of 2 studies); cognitive performance 100% (2 of 2 studies); and quality of life 66.6% (2 of 3 studies). When comparing its effects with conventional physical therapy, the variables that reported the greatest statistically significant changes were motor visualization ability, speed, pain, strength and gait. The most used MRT was motor imagery (MI), and the average time extension of therapies was 3.5 weeks. CONCLUSIONS: movement representation techniques combined with conventional physical therapy are an innocuous and low-cost therapeutic intervention with therapeutic effects in patients with knee arthroplasty (KA) and hip arthroplasty (HA), and this combination generates greater therapeutic effects in physical, functional, and cognitive variables than conventional physical therapy alone.

[Characteristics of resistance training-based programs in older adults with sarcopenia: Scoping review]. / Características de los programas de entrenamiento de fuerza muscular en personas mayores con sarcopenia. Revisión de alcance.

OBJECTIVE: The aim of this scoping review was to analyze the resistance training-based programs' characteristics and outcomes of physical and psychological health and cognitive functions measured in older adults with sarcopenia. METHOD: This scoping review was carried out following the criteria and flow diagram established in the PRISMA guidelines and included studies from 2011 until 2020 from electronic databases, including PubMed, Scopus, and Web of Science. RESULTS: A total of 13 randomized controlled trials were included. The sample's average age was 72.2 years, with an age range between 71 and 80 years, considering a total sample of 1029 older adults (57% women). Resistance training-based programs were carried out mainly in university facilities, presented high adherence (91.2%) and were able to induce increase in strength and muscle mass. The most frequent parameters used were 2-3 weekly, 50-90-min-long sessions for 3-9 months, using between 8 and 15 repetitions, in an intense training zone with 1-RM between 60% and 85%. The most measured physical health outcomes were muscle strength, muscle mass, and BMI. Cognitive impairment was frequently evaluated, and few studies evaluated mental health. CONCLUSION: This review characterized resistance training-based programs in older people with sarcopenia, highlighting the extension, frequency, duration, and intensity of these, as well the most frequently used outcome measures and instruments. These results could be useful for prescribing future resistance training-based programs in older adults with sarcopenia.

Reserva cognitiva y demencias: Limitaciones del efecto protector en el envejecimiento y el deterioro cognitivo / Limited protective effects of cognitive reserve on the progression of cognitive impairment

Aging constitutes a series of physical, physiological and cognitive changes, affecting independence in the activities of daily living. During this stage, neurodegenerative diseases and cognitive impairment are common. Cognitive Reserve allows to face neuropathological changes and maintain cognitive function in the presence of brain damage. However, there are cases where a high cognitive reserve fails to attenuate and delay the effects of neuropathology, allowing the progression of cognitive damage to advanced stages. The objective of this systematic review is to identify evidence where high cognitive reserve does not limit the effects of cognitive impairment. Results indicate that the protective effect of cognitive reserve occurs only in the presence of minimal cognitive impairment, but not at later stages.

[Reserva cognitiva y demencias: Limitaciones del efecto protector en el envejecimiento y el deterioro cognitivoLimited protective effects of cognitive reserve on the progression of cognitive impairment].

Aging constitutes a series of physical, physiological and cognitive changes, affecting independence in the activities of daily living. During this stage, neurodegenerative diseases and cognitive impairment are common. Cognitive Reserve allows to face neuropathological changes and maintain cognitive function in the presence of brain damage. However, there are cases where a high cognitive reserve fails to attenuate and delay the effects of neuropathology, allowing the progression of cognitive damage to advanced stages. The objective of this systematic review is to identify evidence where high cognitive reserve does not limit the effects of cognitive impairment. Results indicate that the protective effect of cognitive reserve occurs only in the presence of minimal cognitive impairment, but not at later stages.

Reserva cognitiva y demencias: Limitaciones del efecto protector en el envejecimiento y el deterioro cognitivoLimited protective effects of cognitive reserve on the progression of cognitive impairment.

Aging constitutes a series of physical, physiological and cognitive changes, affecting independence in the activities of daily living. During this stage, neurodegenerative diseases and cognitive impairment are common. Cognitive Reserve allows to face neuropathological changes and maintain cognitive function in the presence of brain damage. However, there are cases where a high cognitive reserve fails to attenuate and delay the effects of neuropathology, allowing the progression of cognitive damage to advanced stages. The objective of this systematic review is to identify evidence where high cognitive reserve does not limit the effects of cognitive impairment. Results indicate that the protective effect of cognitive reserve occurs only in the presence of minimal cognitive impairment, but not at later stages.