Search results for "motor"
showing 10 items of 3137 documents
Imaging of Keratin Dynamics during the Cell Cycle and in Response to Phosphatase Inhibition
2004
Publisher Summary The characterization and development of autofluorescent proteins, most prominently of the green florescent protein, have provided tools to label cellular structures such that they can be examined in living cells. This chapter highlights the potential of live cell imaging in providing novel and unprecedented insights into the dynamic organization of the keratin cytoskeleton and outlines the important aspects of this method. The live cell imaging experiments suggest that the driving force behind the vectorial and dynamic keratin distribution patterns relies both on microtubules and microfilaments and their associated factors. The studies on the dynamics of the keratin cytosk…
A kinetic study of the formation of smectic phases in novel liquid crystal ionogens
2013
[EN] A multi-rate non-isothermal kinetic analysis of the isotropic-melt to liquid crystalline phase transition of novel liquid crystalline ionogenic copolymers, LCIs, the 10-(4-methoxyazobenzene-4'-oxy)decyl methacrylate]-co-2-(acrylamido-2-methyl-1-propanesulfonic acid)s, 10-MeOAzB/AMPS, copolymers, has been performed by means of calorimetric experiments. An analytical methodology which includes the study of the phase transition rate parameter, the determination of the activation energies by using Kissinger and Flynn-Wall-Ozawa models, and the study of the phase transition kinetics by the use of the Avrami theory, has been applied. The formation of the mesophases from the isotropic state o…
Acetylcholine At Motor Nerves: Storage, Release, and Presynaptic Modulati On By Autoreceptors and Adrenoceptors
1992
Publisher Summary This chapter focuses on the modulation of acetylcholine release from the motor endplate by presynaptic receptors. An individual neuron can regulate its function, the release of transmitters or modulators, through the activation of local feedback loops. After escaping the neuronal membrane and entering the synaptic cleft (or extracellular space), the transmitter activates both the receptors localized at the endorgan (postsynaptic receptors) and the receptors localized at the nerve terminal within its diffusion radius (so-called presynaptic or neuronal receptors). Stimulation of presynaptic receptors triggers the generation of intracellular signals that modify ion channels o…
Body mass index in the early years in relation to motor coordination at the age of 5–7 years
2017
Physical activity (PA) and body mass index (BMI) are consistently associated with motor coordination (MC) in children. However, we know very little how BMI in early childhood associates with MC later in childhood. This study investigated associations between BMI in early childhood and BMI, PA, and MC in middle childhood. Children aged 5 to 7 years (n = 64, 32 girls) were measured for MC using Körperkoordinationstest für Kinder (KTK) and for moderate-to-vigorous PA (MVPA) using triaxial accelerometers. Prevailing body weight and height were measured, and information on weight and height in early years was based on parental report of child health care report cards. Age-adjusted BMIz scores we…
A family based tailored counselling to increase non-exercise physical activity in adults with a sedentary job and physical activity in their young ch…
2011
Background. Epidemiological evidence suggests that decrease in sedentary behaviour is beneficial for health. This family based randomized controlled trial examines whether face-to-face delivered counselling is effective in reducing sedentary time and improving health in adults and increasing moderate-to-vigorous activities in children. Methods. The families are randomized after balancing socioeconomic and environmental factors in the Jyväskylä region, Finland. Inclusion criteria are: healthy men and women with children 3-8 years old, and having an occupation where they self-reportedly sit more than 50% of their work time and children in all-day day-care in kindergarten or in the first grade…
Demo 27. Motor de Stirling
2013
Objetivo: Mostrar el funcionamiento de una máquina térmica sencilla, mediante el intercambio de energía con dos focos térmicos.
Sirds, elpošanas un lokomotoro ritmu sinhronizācijas noteikšana veloergometriskas slodzes laikā
2016
Darbs veltīts fizioloģisko un slodzes ritmu sinhronizācijas fenomena izpētei. Zinātniskajā literatūrā atrodama pretrunīga informācija par to, vai šo fenomenu iespējams novērot. Šī darba ietvaros vēlējāmies noskaidrot, vai iespējams novērot elpošanas un sirdsdarbības frekvences sinhronizāciju ar slodzes ritmu. Praktiski veicām sirdsdarbības frekvences, kā arī elpošanas frekvences pierakstu veloergometriskas slodzes laikā, uzturot vienādu slodzes jaudu, bet mainot pedalēšanas frekvenci, kā arī ļaujot personai slodzes ritmu izvēlēties patvaļīgi.Secinājumi: fenomens slodzes laikā tika novērtos daļēji.
Voluntary Imitation in Alzheimer’s Disease Patients
2016
International audience; Although Alzheimer's disease (AD) primarily manifests as cognitive deficits, the implicit sensorimotor processes that underlie social interactions, such as automatic imitation, seem to be preserved in mild and moderate stages of the disease, as is the ability to communicate with other persons. Nevertheless, when AD patients face more challenging tasks, which do not rely on automatic processes but on explicit voluntary mechanisms and require the patient to pay attention to external events, the cognitive deficits resulting from the disease might negatively affect patients' behavior. The aim of the present study was to investigate whether voluntary motor imitation, i.e.…
The Effects of Resistance Training on Physical Fitness and Neuromotor-Cognitive Functions in Adults With Down Syndrome
2022
Adults with Down syndrome are an underserved population at high risk for a host of different pathologies from aging and lack of activity.PurposeTo examine the effects of a 10-week resistance training program on measures of motor behavior, cognitive function, mood, and physical fitness.MethodsParticipants (n = 11) were men and women clinically diagnosed with Down syndrome (age: 25.8 ± 6.4 years; height: 151.5 ± 8.3 cm; weight: 67.5 ± 13.0 kg; IQ: 58.3 ± 19.7 units). After familiarization of testing procedures, subjects performed The Arizona Cognitive Test Battery for Down Syndrome, TGMD-2, lower and upper body strength assessments, and body composition via DXA testing, while parental guardia…
The effects of motor skill and physical activity interventions on preschoolers' cognitive and academic skills: A systematic review
2022
The present systematic review aimed to investigate the methodological quality and the effects of fundamental motor skills and physical activity interventions on cognitive and academic skills in typically developing 3 to 7-year-old children. The review was conducted and reported in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. A literature search was carried out in April 2020 using seven electronic databases. The methodological quality of the studies was assessed with the Effective Public Health Practice Project (EPHPP) Quality Assessment Tool. Cohen's d effect size calculations and post hoc power analyses were conducted for the in…