Bimanual digit training improves right-hand dexterity in older adults by reactivating declined ipsilateral motor-cortical inhibition

Improving deteriorated sensorimotor functions in older individuals is a social necessity in a super aging society. Previous studies suggested that the declined interhemispheric sensorimotor inhibition observed in older adults is associated with their deteriorated hand/finger dexterity. Here, we examined whether bimanual digit exercises, which can train the interhemispheric inhibitory system, improve deteriorated hand/finger dexterity in older adults. Forty-eight healthy, right-handed, older adults (65-78 years old) were divided into two groups, i.e., the bimanual (BM) digit training and right-hand (RH) training groups, and intensive daily training was performed for 2 months. Before and after the training, we evaluated individual right hand/finger dexterity using a peg task, and the individual state of interhemispheric sensorimotor inhibition by analyzing ipsilateral sensorimotor deactivation via functional magnetic resonance imaging when participants experienced a kinesthetic illusory movement of the right-hand without performing any motor tasks. Before training, the degree of reduction/loss of ipsilateral motor-cortical deactivation was associated with dexterity deterioration. After training, the dexterity improved only in the BM group, and the dexterity improvement was correlated with reduction in ipsilateral motor-cortical activity. The capability of the brain to inhibit ipsilateral motor-cortical activity during a simple right-hand sensory-motor task is tightly related to right-hand dexterity in older adults.

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Bimanual digit training improves right-hand dexterity in older adults by reactivating declined ipsilateral motor-cortical inhibition

Scientific Reports ◽

10.1038/s41598-021-02173-7 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Eiichi Naito ◽

Tomoyo Morita ◽

Satoshi Hirose ◽

Nodoka Kimura ◽

Hideya Okamoto ◽

...

Keyword(s):

Older Adults ◽

Motor Task ◽

Cortical Activity ◽

Cortical Inhibition ◽

Older Individuals ◽

Inhibitory System ◽

Finger Dexterity ◽

Right Hand ◽

Hand Dexterity ◽

Motor Cortical

AbstractImproving deteriorated sensorimotor functions in older individuals is a social necessity in a super-aging society. Previous studies suggested that the declined interhemispheric sensorimotor inhibition observed in older adults is associated with their deteriorated hand/finger dexterity. Here, we examined whether bimanual digit exercises, which can train the interhemispheric inhibitory system, improve deteriorated hand/finger dexterity in older adults. Forty-eight healthy, right-handed, older adults (65–78 years old) were divided into two groups, i.e., the bimanual (BM) digit training and right-hand (RH) training groups, and intensive daily training was performed for 2 months. Before and after the training, we evaluated individual right hand/finger dexterity using a peg task, and the individual state of interhemispheric sensorimotor inhibition by analyzing ipsilateral sensorimotor deactivation via functional magnetic resonance imaging when participants experienced a kinesthetic illusory movement of the right-hand without performing any motor tasks. Before training, the degree of reduction/loss of ipsilateral motor-cortical deactivation was associated with dexterity deterioration. After training, the dexterity improved only in the BM group, and the dexterity improvement was correlated with reduction in ipsilateral motor-cortical activity. The capability of the brain to inhibit ipsilateral motor-cortical activity during a simple right-hand sensory-motor task is tightly related to right-hand dexterity in older adults.

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Cortical Activity During Postural Recovery in Response to Predictable and Unpredictable Perturbations in Healthy Young and Older Adults: A Quantitative EEG Assessment

Basic and Clinical Neuroscience Journal ◽

10.32598/bcn.12.2.453.1 ◽

2021 ◽

Vol 12 (2) ◽

pp. 291-300

Author(s):

Zahra Saadat ◽

◽

Ehsan Sinaei ◽

Soraya Pirouzi ◽

Mohsen Ghofrani ◽

...

Keyword(s):

Older Adults ◽

Spectral Power ◽

Late Phase ◽

Cortical Activity ◽

Cortical Activation ◽

Alpha Power ◽

Older Individuals ◽

External Perturbations ◽

Beta Power ◽

Postural Recovery

Introduction: To investigate the effects of predictable and unpredictable external perturbations on cortical activity in healthy young and older adults. Methods: Twenty healthy older and 19 healthy young adults were exposed to predictable and unpredictable external perturbations, and their cortical activity upon postural recovery was measured using a 32-channel quantitative encephalography. The absolute spectral power and coherence z-scores of cortical waves were analyzed through a 3-way mixed ANOVA. Results: During postural recovery from predictable perturbations, older adults exhibited higher frontoparietal beta power and higher alpha and beta coherence during the late-phase recovery than the young individuals. After unpredictable perturbations, the older group showed lower alpha power in the early phase and higher beta power in the late phase as compared to the young group. Results for the group × time and group × location interactions in the older group showed a higher alpha and beta coherence over the late phase, a higher alpha coherence in F3−P3 and F4−P4 regions, and a higher beta coherence in the F4−P4 region compared to the younger group. Conclusion: Our results revealed that the cortical activation after external perturbations increases with aging, particularly in frontoparietal areas. A shift from automatic (subcortical level) to attentional (cortical level) processing may reflect the contribution of attentional resources for postural recovery from an external threat in older individuals.

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Perceived Voice Disorders in Older Adults and Impact on Social Interactions

Perspectives of the ASHA Special Interest Groups ◽

10.1044/2020_persp-20-00059 ◽

2021 ◽

pp. 1-8

Author(s):

Connie K. Porcaro ◽

Clare Singer ◽

Boris Djokic ◽

Ali A. Danesh ◽

Ruth Tappen ◽

...

Keyword(s):

Older Adults ◽

Social Interactions ◽

Social Engagement ◽

Leisure Activities ◽

Treatment Strategies ◽

Voice Disorders ◽

Community Dwelling ◽

Vocal Performance ◽

Older Individuals ◽

Cross Sectional

Purpose Many aging individuals, even those who are healthy, report voice changes that can impact their ability to communicate as they once did. While this is commonly reported, most do not seek evaluation or management for this issue. The purpose of this study was to investigate the prevalence and differences in voice disorders in older adults, along with the effect of fatigue on their social interactions. Method This is a cross-sectional investigation of a community-dwelling sample of individuals aged 60 years or older. Participants completed the Questionnaire on Vocal Performance, the Social Engagement Index subset “Engagement in Social or Leisure Activities,” and the Fatigue Severity Scale. Results Results indicated 32.5% of the 332 participants reported symptoms of voice problems with no difference found between male and female respondents. A slight increase in report of voice problems was noted with each year of age. Participants who self-reported voice problems indicated less interaction in social activities involving communication than those who did not. Finally, as severity of self-reported voice problems increased, an increase was reported by the same individuals for signs of fatigue. Conclusions Voice problems and resulting decreased social interaction are commonly experienced by older individuals. Voice symptoms in older adults have been found to benefit from evidence-based treatment strategies. It is critical to provide education to encourage older individuals to seek appropriate evaluation and management for voice issues through a speech-language pathologist or medical professional.

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Are spacial extension and recruitment of motor cortical inhibition related? Evidence using transcranial magnetic stimulation

Klinische Neurophysiologie ◽

10.1055/s-2006-939110 ◽

2006 ◽

Vol 37 (01) ◽

Author(s):

M Bott ◽

M Behrang-Nia ◽

S Klimpe ◽

KJ Werhahn

Keyword(s):

Transcranial Magnetic Stimulation ◽

Magnetic Stimulation ◽

Cortical Inhibition ◽

Motor Cortical

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Age Advantages of Emotional Experience during the COVID-19 Pandemic are Robust, but Diminished Compared to Pre-pandemic Conditions

10.31234/osf.io/h2fsq ◽

2020 ◽

Author(s):

Rui Sun ◽

Disa Sauter

Keyword(s):

Older Adults ◽

Large Scale ◽

Negative Emotion ◽

Emotional Experience ◽

Negative Emotions ◽

Older Individuals ◽

Selection Strategies ◽

Scale Test ◽

Prolonged Stress

Getting old is generally seen as unappealing, yet aging confers considerable advantages in several psychological domains (North & Fiske, 2015). In particular, older adults are better off emotionally than younger adults, with aging associated with the so-called “age advantages,” that is, more positive and less negative emotional experiences (Carstensen et al., 2011). Although the age advantages are well established, it is less clear whether they occur under conditions of prolonged stress. In a recent study, Carstensen et al (2020) demonstrated that the age advantages persist during the COVID-19 pandemic, suggesting that older adults are able to utilise cognitive and behavioural strategies to ameliorate even sustained stress. Here, we build on Carstensen and colleagues’ work with two studies. In Study 1, we provide a large-scale test of the robustness of Carstensen and colleagues’ finding that older individuals experience more positive and less negative emotions during the COVID-19 pandemic. We measured positive and negative emotions along with age information in 23,629 participants in 63 countries in April-May 2020. In Study 2, we provide a comparison of the age advantages using representative samples collected before and during the COVID-19 pandemic. We demonstrate that older people experience less negative emotion than younger people during the prolonged stress of the COVID-19 pandemic. However, the advantage of older adults was diminished during the pandemic, pointing to a likely role of older adults use of situation selection strategies (Charles, 2010).

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Medically Treated Opioid Overdoses Among the U.S. Elderly: Trends and Correlates

Innovation in Aging ◽

10.1093/geroni/igaa057.176 ◽

2020 ◽

Vol 4 (Supplement_1) ◽

pp. 54-54

Author(s):

Peter Treitler ◽

Stephen Crystal ◽

Richard Hermida ◽

Jennifer Miles

Keyword(s):

Older Adults ◽

Pain Management ◽

The Elderly ◽

Opioid Use Disorder ◽

Chronic Obstructive ◽

Medicare Beneficiaries ◽

Older Individuals ◽

Opioid Use ◽

Policy And Practice ◽

Obstructive Pulmonary Disease

Abstract High rates of opioid prescribing and comorbid medical conditions increase risk of overdose among older adults. As the US population ages and the rates of opioid use disorder (OUD) increase in the elderly population, there is a need to characterize trends and correlates of overdose in order to more effectively target policy and practice. Using a ~40% random sample of 2015-2017 Medicare beneficiaries ages 65 and older with Part D pharmacy coverage, this study examined medically treated opioid overdoses among US older adults. The sample included 13-14 million beneficiaries per year. The rate of medically treated opioid overdoses among elderly Medicare beneficiaries increased by 15% from 6 per 10,000 in 2015 to 6.9 per 10,000 in 2017. Those with overdose were disproportionately female (63%), non-Hispanic white (83%), with diagnoses of pain conditions (96%), with diagnoses of major depression (63%), and with high rates of conditions that decrease respiratory reserve such as chronic obstructive pulmonary disease. 13% had co-occurring diagnosed alcohol use disorder, 36% were diagnosed with opioid dependence or abuse, and 12% were diagnosed with hepatitis C. Older individuals with overdose represent a complex mix of risk factors; identifying those most at risk (as well as those who have very low risk, whose pain management may be compromised by overly-rigid interpretation of opioid use guidelines) is key in order to address multiple risks, balancing risk reduction with appropriate pain management.

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Changes in Health Behaviors, Mental and Physical Health among Older Adults under Severe Lockdown Restrictions during the COVID-19 Pandemic in Spain

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18137067 ◽

2021 ◽

Vol 18 (13) ◽

pp. 7067

Author(s):

Esther García-Esquinas ◽

Rosario Ortolá ◽

Iago Gine-Vázquez ◽

José A. Carnicero ◽

Asier Mañas ◽

...

Keyword(s):

Mental Health ◽

Physical Activity ◽

Older Adults ◽

Social Isolation ◽

Community Dwelling ◽

Housing Conditions ◽

Older Individuals ◽

Lifestyle Risk Factors ◽

Increased Risk ◽

Lifestyle Risk

We used data from 3041 participants in four cohorts of community-dwelling individuals aged ≥65 years in Spain collected through a pre-pandemic face-to-face interview and a telephone interview conducted between weeks 7 to 15 after the beginning of the COVID-19 lockdown. On average, the confinement was not associated with a deterioration in lifestyle risk factors (smoking, alcohol intake, diet, or weight), except for a decreased physical activity and increased sedentary time, which reversed with the end of confinement. However, chronic pain worsened, and moderate declines in mental health, that did not seem to reverse after restrictions were lifted, were observed. Males, older adults with greater social isolation or greater feelings of loneliness, those with poorer housing conditions, as well as those with a higher prevalence of chronic morbidities were at increased risk of developing unhealthier lifestyles or mental health declines with confinement. On the other hand, previously having a greater adherence to the Mediterranean diet and doing more physical activity protected older adults from developing unhealthier lifestyles with confinement. If another lockdown were imposed during this or future pandemics, public health programs should specially address the needs of older individuals with male sex, greater social isolation, sub-optimal housing conditions, and chronic morbidities because of their greater vulnerability to the enacted movement restrictions.

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Prediction of 11-year incidence of psychophysically dependent status or death among community-dwelling younger elderlies: from an age-specified community-based cohort study (the NISSIN project)

Environmental Health and Preventive Medicine ◽

10.1186/s12199-021-00968-8 ◽

2021 ◽

Vol 26 (1) ◽

Author(s):

Satoe Okabayashi ◽

Takashi Kawamura ◽

Hisashi Noma ◽

Kenji Wakai ◽

Masahiko Ando ◽

...

Keyword(s):

Older Adults ◽

Logistic Regression ◽

Cohort Study ◽

Prediction Model ◽

Nursing Care ◽

Family Members ◽

Limited Resource ◽

Community Dwelling ◽

Older Individuals ◽

Regression Analyses

Abstract Background Predicting adverse health events and implementing preventative measures are a necessary challenge. It is important for healthcare planners and policymakers to allocate the limited resource to high-risk persons. Prediction is also important for older individuals, their family members, and clinicians to prepare mentally and financially. The aim of this study is to develop a prediction model for within 11-year dependent status requiring long-term nursing care or death in older adults for each sex. Methods We carried out age-specified cohort study of community dwellers in Nisshin City, Japan. The older adults aged 64 years who underwent medical check-up between 1996 and 2005 were included in the study. The primary outcome was the incidence of the psychophysically dependent status or death or by the end of the year of age 75 years. Univariable logistic regression analyses were performed to assess the associations between candidate predictors and the outcome. Using the variables with p-values less than 0.1, multivariable logistic regression analyses were then performed with backward stepwise elimination to determine the final predictors for the model. Results Of the 1525 female participants at baseline, 105 had an incidence of the study outcome. The final prediction model consisted of 15 variables, and the c-statistics for predicting the outcome was 0.763 (95% confidence interval [CI] 0.714–0.813). Of the 1548 male participants at baseline, 211 had incidence of the study outcome. The final prediction model consisted of 16 variables, and the c-statistics for predicting the outcome was 0.735 (95% CI 0.699–0.771). Conclusions We developed a prediction model for older adults to forecast 11-year incidence of dependent status requiring nursing care or death in each sex. The predictability was fair, but we could not evaluate the external validity of this model. It could be of some help for healthcare planners, policy makers, clinicians, older individuals, and their family members to weigh the priority of support.

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Effect of isometric exercises on the masseter muscle in older adults with missing dentition: a randomized controlled trial

Scientific Reports ◽

10.1038/s41598-021-86807-w ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Satoru Takano ◽

Kohei Yamaguchi ◽

Kazuharu Nakagawa ◽

Kanako Yoshimi ◽

Ayako Nakane ◽

...

Keyword(s):

Older Adults ◽

Masseter Muscle ◽

Controlled Trial ◽

Intervention Group ◽

Muscle Thickness ◽

Control Group ◽

Older Individuals ◽

Muscle Properties ◽

Oral Function ◽

Masticatory Ability

AbstractMaintaining oral function in older individuals with missing teeth is important for leading a healthy and independent life. This study aimed to evaluate whether simple isometric exercises can maintain and improve the oral function [maximum occlusal force (MOF) and masticatory ability (MA)] and the masticatory muscle properties [masseter muscle thickness (MMT) and echo intensity (MMEI)] in older adults during the maintenance phase of removable prosthetic treatment. Participants were randomly categorized into the intervention and control groups. The mouthpieces were distributed, and participants were instructed to use them for exercising. The intervention group was instructed to perform maximum clenching for 10 s, whereas the control group was instructed to tap the teeth at an arbitrary speed for 10 s. Both were repeated five times at an interval of 5 s between each activity and twice daily for 4 weeks. The outcomes were measured after a month of exercise. The intervention group showed a significant improvement in the MOF, MMT during contraction, MMT at rest and MMEI during contraction. There were no significant differences in the MA and MMEI at rest. In the control group, no improvement was observed in any of the parameters. When the isometric exercises were performed using a mouthpiece, there was an improvement in the oral function and masseter muscle properties in older individuals with Eichner B status who used dentures.

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