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https://www.readbyqxmd.com/read/29352196/hyper-hippocampal-glycogen-induced-by-glycogen-loading-with-exhaustive-exercise
#1
Mariko Soya, Takashi Matsui, Takeru Shima, Subrina Jesmin, Naomi Omi, Hideaki Soya
Glycogen loading (GL), a well-known type of sports conditioning, in combination with exercise and a high carbohydrate diet (HCD) for 1 week enhances individual endurance capacity through muscle glycogen supercompensation. This exercise-diet combination is necessary for successful GL. Glycogen in the brain contributes to hippocampus-related memory functions and endurance capacity. Although the effect of HCD on the brain remains unknown, brain supercompensation occurs following exhaustive exercise (EE), a component of GL...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29346627/severe-and-protracted-sleep-disruptions-in-mouse-model-of-post-traumatic-stress-disorder
#2
Rishi Sharma, Pradeep Sahota, Mahesh M Thakkar
Increasing evidences suggest that the predator threat model is a valid animal model of post-traumatic stress disorder (PTSD). However, sleep has never been examined in this model. Since sleep disturbances, including insomnia and excessive daytime sleepiness, are severe and protracted symptoms of PTSD, we hypothesized that mice exposed to predator odor trauma (POT) will display contextual fear conditioning along with severe and protracted sleep disruptions.Adult male C57BL/6J mice, instrumented with wire electrodes [to record hippocampal field potentials (LFP) and nuchal muscle (EMG) activity], were exposed to contextual conditioning using soiled cat litter as unconditional stimulus (US)...
January 13, 2018: Sleep
https://www.readbyqxmd.com/read/29332033/effect-of-dual-tasking-on-anticipatory-and-compensatory-postural-adjustments-in-response-to-external-perturbations-in-individuals-with-nonspecific-chronic-low-back-pain-electromyographic-analysis
#3
Ladan Hemmati, Soraya Piroozi, Zahra Rojhani-Shirazi
BACKGROUND: In patients with chronic low back pain (CLBP), postural control is a demanding task in terms of attention. Although the attentional demands of postural control have been investigated in these patients, the attentional demands of postural recovery during dual task performance have not been evaluated in patients with nonspecific CLBP. OBJECTIVE: To investigate the effect of dual tasking on anticipatory and compensatory postural adjustments in response to an external perturbation in patients with nonspecific CLBP...
December 29, 2017: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/29330372/non-estrogenic-xanthohumol-derivatives-mitigate-insulin-resistance-and-cognitive-impairment-in-high-fat-diet-induced-obese-mice
#4
Cristobal L Miranda, Lance A Johnson, Oriane de Montgolfier, Valerie D Elias, Lea S Ullrich, Joshua J Hay, Ines L Paraiso, Jaewoo Choi, Ralph L Reed, Johana S Revel, Chrissa Kioussi, Gerd Bobe, Urszula T Iwaniec, Russell T Turner, Benita S Katzenellenbogen, John A Katzenellenbogen, Paul R Blakemore, Adrian F Gombart, Claudia S Maier, Jacob Raber, Jan F Stevens
Xanthohumol (XN), a prenylated flavonoid from hops, improves dysfunctional glucose and lipid metabolism in animal models of metabolic syndrome (MetS). However, its metabolic transformation into the estrogenic metabolite, 8-prenylnaringenin (8-PN), poses a potential health concern for its use in humans. To address this concern, we evaluated two hydrogenated derivatives, α,β-dihydro-XN (DXN) and tetrahydro-XN (TXN), which showed negligible affinity for estrogen receptors α and β, and which cannot be metabolically converted into 8-PN...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29319482/perioperative-chemotherapy-for-bladder-cancer-a-qualitative-study-of-physician-knowledge-attitudes-and-behaviour
#5
Melanie Walker, R Christopher Doiron, Simon D French, Deb Feldman-Stewart, D Robert Siemens, William J Mackillop, Christopher M Booth
INTRODUCTION: Use of chemotherapy for muscle-invasive bladder cancer (MIBC) is known to be low. To understand factors driving practice we use the Theoretical Domains Framework (TDF) to identify barriers and enablers of chemotherapy use. METHODS: A convenience sample of Canadian urologists, medical oncologists (MOs) and radiation oncologists (ROs) participated in individual, semi-structured, one-hour telephone interviews. An interview guide was developed using the TDF to assess potential barriers and enablers of chemotherapy use...
December 22, 2017: Canadian Urological Association Journal, Journal de L'Association des Urologues du Canada
https://www.readbyqxmd.com/read/29251571/shape-memory-alloy-based-soft-gripper-with-variable-stiffness-for-compliant-and-effective-grasping
#6
Wei Wang, Sung-Hoon Ahn
Soft pneumatic actuators and motor-based mechanisms being concomitant with the cumbersome appendages have many challenges to making the independent robotic system with compact and lightweight configuration. Meanwhile, shape memory actuators have shown a promising alternative solution in many engineering applications ranging from artificial muscle to aerospace industry. However, one of the main limitations of such systems is their inherent softness resulting in a small actuation force, which prevents them from more effective applications...
December 2017: Soft Robotics
https://www.readbyqxmd.com/read/29250838/artificial-muscles-mechanisms-applications-and-challenges
#7
REVIEW
Seyed M Mirvakili, Ian W Hunter
The area of artificial muscle is a highly interdisciplinary field of research that has evolved rapidly in the last 30 years. Recent advances in nanomaterial fabrication and characterization, specifically carbon nanotubes and nanowires, have had major contributions in the development of artificial muscles. However, what can artificial muscles really do for humans? This question is considered here by first examining nature's solutions to this design problem and then discussing the structure, actuation mechanism, applications, and limitations of recently developed artificial muscles, including highly oriented semicrystalline polymer fibers; nanocomposite actuators; twisted nanofiber yarns; thermally activated shape-memory alloys; ionic-polymer/metal composites; dielectric-elastomer actuators; conducting polymers; stimuli-responsive gels; piezoelectric, electrostrictive, magnetostrictive, and photostrictive actuators; photoexcited actuators; electrostatic actuators; and pneumatic actuators...
December 18, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29212528/effectiveness-of-robot-assisted-training-added-to-conventional-rehabilitation-in-patients-with-humeral-fracture-early-after-surgical-treatment-protocol-of-a-randomised-controlled-multicentre-trial
#8
Corinna Nerz, Lars Schwickert, Clemens Becker, Stefan Studier-Fischer, Janina Anna Müßig, Peter Augat
BACKGROUND: The incidence of proximal humeral fractures increases with age. The functional recovery of the upper arm after such fractures is slow, and results are often disappointing. Treatment is associated with long immobilisation periods. Evidence-based exercise guidelines are missing. Loss of muscle mass as well as reduced range of motion and motor performance are common consequences. These losses could be partly counteracted by training interventions using robot-assisted arm support of the affected arm derived from neurorehabilitation...
December 6, 2017: Trials
https://www.readbyqxmd.com/read/29195055/neuromuscular-junction-formation-aging-and-disorders
#9
Lei Li, Wen-Cheng Xiong, Lin Mei
Synapses, the fundamental unit in neuronal circuits, are critical for learning and memory, perception, thinking, and reaction. The neuromuscular junction (NMJ) is a synapse formed between motoneurons and skeletal muscle fibers that is wrapped by Schwann cells (SCs). It is essential for controlling muscle contraction. NMJ formation requires intimate interactions among motoneurons, muscles, and SCs. Deficits in NMJ formation and maintenance cause neuromuscular disorders, including congenital myasthenic syndrome and myasthenia gravis...
December 1, 2017: Annual Review of Physiology
https://www.readbyqxmd.com/read/29176443/levosimendan-enhances-memory-through-antioxidant-effect-in-rat-model-behavioral-and-molecular-study
#10
Abeer M Rababa'h, Karem H Alzoubi, Ala'a Atmeh
Impairment of learning and memory has been associated with accumulation of reactive oxygen species in the body. It has also been found that antioxidants enhance learning and memory. Levosimendan is a cardiac inotropic and vasodilator agent that has pleotropic effects including antioxidant, anti-inflammatory, and smooth muscle vasodilatory actions. In this study, we investigated the effect of levosimendan on learning and memory in rats. Levosimendan (12 µg/kg, intraperitoneally) or vehicle was administered once a week for 8 weeks...
November 21, 2017: Behavioural Pharmacology
https://www.readbyqxmd.com/read/29165540/mobile-application-removes-societal-barriers-to-p4-medicine
#11
J-P Michel
The overlap between one innovative paradigm (P4 medicine: predictive, personalized, participatory and preventive) and another (a new definition of "Healthy ageing") is fertile ground for new technologies; a new mobile application (app) that could broaden our scientific knowledge of the ageing process and help us to better analyse the impact of possible interventions in slowing the ageing decline. A novel mobile application is here presented as a game including questions and tests will allow in 10 minutes the assessment of the following domains: robustness, flexibility (lower muscle strength), balance, mental and memory complaints, semantic memory and visual retention...
2017: Journal of Frailty & Aging
https://www.readbyqxmd.com/read/29158983/adult-zebra-finches-rehearse-highly-variable-song-patterns-during-sleep
#12
Brent K Young, Gabriel B Mindlin, Ezequiel Arneodo, Franz Goller
Brain activity during sleep is fairly ubiquitous and the best studied possible function is a role in memory consolidation, including motor memory. One suggested mechanism of how neural activity effects these benefits is through reactivation of neurons in patterns resembling those of the preceding experience. The specific patterns of motor activation replayed during sleep are largely unknown for any system. Brain areas devoted to song production in the songbird brain exhibit spontaneous song-like activity during sleep, but single cell neural recordings did not permit detection of the specific song patterns...
2017: PeerJ
https://www.readbyqxmd.com/read/29154290/positive-facial-expressions-during-retrieval-of-self-defining-memories
#13
Marie Charlotte Gandolphe, Jean Louis Nandrino, Gérald Delelis, Claire Ducro, Audrey Lavallee, Xavier Saloppe, Ahmed A Moustafa, Mohamad El Haj
In this study, we investigated, for the first time, facial expressions during the retrieval of Self-defining memories (i.e., those vivid and emotionally intense memories of enduring concerns or unresolved conflicts). Participants self-rated the emotional valence of their Self-defining memories and autobiographical retrieval was analyzed with a facial analysis software. This software (Facereader) synthesizes the facial expression information (i.e., cheek, lips, muscles, eyebrow muscles) to describe and categorize facial expressions (i...
November 14, 2017: Journal of Integrative Neuroscience
https://www.readbyqxmd.com/read/29143805/mechanisms-of-acupuncture-therapy-in-ischemic-stroke-rehabilitation-a-literature-review-of-basic-studies
#14
REVIEW
Lina M Chavez, Shiang-Suo Huang, Iona MacDonald, Jaung-Geng Lin, Yu-Chen Lee, Yi-Hung Chen
Acupuncture is recommended by the World Health Organization (WHO) as an alternative and complementary strategy for stroke treatment and for improving stroke care. Clinical trial and meta-analysis findings have demonstrated the efficacy of acupuncture in improving balance function, reducing spasticity, and increasing muscle strength and general well-being post-stroke. The mechanisms underlying the beneficial effects of acupuncture in stroke rehabilitation remain unclear. The aim of this study was to conduct a literature review, summarize the current known mechanisms in ischemic stroke rehabilitation through acupuncture and electroacupuncture (EA) therapy, and to detail the frequently used acupoints implicated in these effects...
October 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29118960/from-the-padua-muscle-days-the-basic-and-applied-myology-and-the-european-journal-of-translational-myology-to-the-a-cm-carraro-foundation-for-translational-myology
#15
Ugo Carraro
As a young researched I had the option to work on skeletal muscle at the University of Padova, Italy. Introduced to the study of muscle denervation/reinnervation, I started a project on long term denervated muscle that still is my primary interest and took me from rodents' models of chronic muscle denervation to human spinal cord injury-related muscle denervation and its managements. On the way, I organized a series of conferences in Euganei Hills, Padua, Italy and an international journal, the Basic and Applied Myology...
June 27, 2017: European Journal of Translational Myology
https://www.readbyqxmd.com/read/29107037/transcriptional-correlates-of-proximal-distal-identify-and-regeneration-timing-in-axolotl-limbs
#16
S Randal Voss, David Murrugarra, Tyler B Jensen, James R Monaghan
Cells within salamander limbs retain memories that inform the correct replacement of amputated tissues at different positions along the length of the arm, with proximal and amputations completing regeneration at similar times. We investigated the possibility that positional memory is associated with variation in transcript abundances along the proximal-distal limb axis. Transcripts were deeply sampled from Ambystoma mexicanum limbs at the time they were administered fore arm vs upper arm amputations, and at 20 post-amputation time points...
October 26, 2017: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/29098620/clinical-evidence-of-exercise-benefits-for-stroke
#17
Peipei Han, Wen Zhang, Li Kang, Yixuan Ma, Liyuan Fu, Liye Jia, Hairui Yu, Xiaoyu Chen, Lin Hou, Lu Wang, Xing Yu, Masahiro Kohzuki, Qi Guo
Even though stroke is the third, not the first, most common cause of disability-adjusted life years in developed countries, it is one of the most expensive to treat. Part of the expense is due to secondary problems in the post-stroke period including: cognition, memory, attention span, pain, sensation loss, psychological issues, and problems with mobility and balance. Research has identified that exercise has both positive physical and psychosocial effects for post-stroke patients. Therefore, this scientific statement provides an overview on exercise rehabilitation for post-stroke patients...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29097202/distinct-amyloid-precursor-protein-processing-machineries-of-the-olfactory-system
#18
Jae Yeon Kim, Ameer Rasheed, Seung-Jun Yoo, So Yeun Kim, Bongki Cho, Gowoon Son, Seong-Woon Yu, Keun-A Chang, Yoo-Hun Suh, Cheil Moon
Processing of amyloid precursor protein (APP) occurs through sequential cleavages first by β-secretase and then by the γ-secretase complex. However, abnormal processing of APP leads to excessive production of β-amyloid (Aβ) in the central nervous system (CNS), an event which is regarded as a primary cause of Alzheimer's disease (AD). In particular, gene mutations of the γ-secretase complex-which contains presenilin 1 or 2 as the catalytic core-could trigger marked Aβ accumulation. Olfactory dysfunction usually occurs before the onset of typical AD-related symptoms (eg, memory loss or muscle retardation), suggesting that the olfactory system may be one of the most vulnerable regions to AD...
October 31, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29095692/long-term-recording-of-electromyographic-activity-from-multiple-muscles-to-monitor-physical-activity-of-participants-with-or-without-a-neurological-disorder
#19
Katie Gant, Jorge Bohorquez, Christine K Thomas
Various portable monitors have been used to quantify physical activity but most rely on detecting limb movement with a sensor rather than measuring muscle activity. Our first goal was to design and validate a portable system for recording surface electromyographic activity (EMG) from eight muscles over 24 h. The modular system includes: (1) preamplifiers that filter and amplify signals; (2) a preprocessor unit for further filtering and amplification, signal offset and power supply modification; (3) a data-logger for analog-to-digital conversion; a flash memory card for data storage and (4) a rechargeable battery...
November 2, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/29081402/conformational-memory-in-the-association-of-the-transmembrane-protein-phospholamban-with-the-sarcoplasmic-reticulum-calcium-pump-serca
#20
Serena Smeazzetto, Gareth P Armanious, Marai Rosa Moncelli, Jessi J Bak, M Joanne Lemieux, Howard S Young, Francesco Tadini-Buoninsegni
The sarcoplasmic reticulum Ca2+-ATPase SERCA promotes muscle relaxation by pumping calcium ions from the cytoplasm into the sarcoplasmic reticulum. SERCA activity is regulated by a variety of small transmembrane peptides, most notably by phospholamban in cardiac muscle and sarcolipin in skeletal muscle. However, how phospholamban and sarcolipin regulate SERCA is not fully understood. In the present study, we evaluated the effects of phospholamban and sarcolipin on calcium translocation and ATP hydrolysis by SERCA under conditions that mimic environments in sarcoplasmic reticulum membranes...
October 29, 2017: Journal of Biological Chemistry
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