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Anticipatory Postural Adjustment

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https://www.readbyqxmd.com/read/29777980/trunk-postural-adjustments-medium-term-reliability-and-correlation-with-changes-of-clinical-outcomes-following-an-8-week-lumbar-stabilization-exercise-program
#1
Jean-Alexandre Boucher, Richard Preuss, Sharon M Henry, Marilee Nugent, Christian Larivière
BACKGROUND: Low back pain (LBP) has been previously associated with delayed anticipatory postural adjustments (APAs) determined by trunk muscle activation. Lumbar stabilization exercise programs (LSEP) for patients with LBP may restore the trunk neuromuscular control of the lumbar spine, and normalize APAs. This exploratory study aimed at testing the reliability of EMG and kinematics-based postural adjustment measures over an 8-week interval, assessing their sensitivity to LBP status and treatment and examining their relationship with clinical outcomes...
April 22, 2018: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29770123/what-if-low-back-pain-is-the-most-prevalent-parkinsonism-in-the-world
#2
Jesse V Jacobs, Sharon M Henry, Fay B Horak
Low back pain (LBP) has a point prevalence of nearly 10% and ranks highest in global disease burden for years lived with disability; Parkinson's disease (PD) ranks in the top 100 most disabling health conditions for years lost and years lived with disability (1). Recent evidence suggests that people with chronic, recurrent LBP exhibit many postural impairments reminiscent of a neurological postural disorder such as PD. We compare and contrast postural impairments associated with LBP and PD in order to inform treatment strategies for both conditions...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29745627/neurophysiological-and-clinical-effects-of-blinfolded-balance-training-bbt-in-parkinson-s-disease-patients-a-preliminary-study
#3
Sonia Bonnì, Viviana Ponzo, Marco Tramontano, Alex Martino Cinnera, Carlo Caltagirone, Giacomo Koch, Antonella Peppe
BACKGROUND: Recent evidence support the hypothesis that rehabilitative strategies based on sensorimotor stimulation in the neurorehabilitation of Parkinson's Disease (PD) may be useful to improve gait in PD patients. AIM: We supposed that sensorimotor stimulation produce modulation of Anticipatory Postural Adjustments (APAs) arising from the supplementary motor area (SMA). We aimed to investigate the clinical and neurophysiological effects of a blindfolded balance training (BBT)...
May 9, 2018: European Journal of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/29706697/prediction-of-falling-risk-after-discharge-in-ambulatory-stroke-or-history-of-fracture-patients-using-balance-evaluation-systems-test-bestest
#4
Kazuhiro Miyata, Yoichi Kaizu, Shigeru Usuda
[Purpose] The purpose of this study was to clarify the relationships between falls and sections of the Balance Evaluation Systems Test (BESTest) in patients with stroke or those with a history of fracture. [Subjects and Methods] This longitudinal study included 51 self-ambulatory inpatients. Balance was assessed 1 week prior to discharge using the BESTest, and the incidence of falls within 6 months after discharge was investigated. Relationships between falling and balance components were analyzed using the t - test or the Mann-Whitney U test and receiver operating characteristic (ROC) curve analysis...
April 2018: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29617219/mu-oscillations-changes-related-to-the-development-of-anticipatory-postural-control-in-children-and-adolescents
#5
Fanny Barlaam, Carole Fortin, Marianne Vaugoyeau, Christina Schmitz, Christine Assaiante
Anticipatory postural Adjustments (APAs) cancel the destabilizing effects of movement on posture. Across development, the maturation of APAs is characterized by an accurate adjustment of the timing parameters of electromyographic (EMG) response. The study aimed at investigating the maturation of cortical oscillations involved in the improvement of APAs efficiency. Thirty-six healthy participants (8-16 years) performed the bimanual load-lifting task in which subjects are instructed to lift a load, placed on the left forearm, with the right hand...
April 4, 2018: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29606548/consecutive-postural-adjustments-cpas-a-kinetic-analysis-of-variable-velocity-during-a-pointing-task
#6
Paul Fourcade, Simon Bouisset, Serge Le Bozec, Sahel Memari
AIM: This paper examines the postural adjustments that occur after the end of a voluntary movement (consecutive postural adjustments, CPAs). Its aim is to reinforce the theory that CPAs are necessary to counterbalance the destabilizing effect of a voluntary movement. In addition, we compared the main features of CPAs with those of anticipatory postural adjustments (APAs) in order to gather evidence that could afford new insights into postural programming. METHODS: Nine healthy adults were invited to adopt a sitting position to perform nine pointing movements at decreasing velocities...
March 29, 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29576932/anticipatory-postural-adjustments-and-kinematic-arm-features-when-postural-stability-is-manipulated
#7
Bianca Callegari, Ghislain Saunier, Manuela Brito Duarte, Gizele Cristina da Silva Almeida, Cesar Ferreira Amorim, France Mourey, Thierry Pozzo, Givago da Silva Souza
Beyond the classical paradigm that presents the Anticipatory Postural Adjustments (APAs) as a manner to create forces that counteract disturbances arising from the moving segment during a pointing task, there is a controversial discussion about the role APAs to facilitate the movement and perform a task accurately. In addition, arm kinematics features are classically used to infer the content of motor planning for the execution and the control of arm movements. The present study aimed to disentangle the conflicting role of APAs during an arm-pointing task in which the subjects reach a central diode that suddenly turns on, while their postural stability was manipulated...
2018: PeerJ
https://www.readbyqxmd.com/read/29573980/systemic-effects-of-deep-brain-stimulation-on-synergic-control-in-parkinson-s-disease
#8
Ali Falaki, Hang Jin Jo, Mechelle M Lewis, Barbara O'Connell, Sol De Jesus, James McInerney, Xuemei Huang, Mark L Latash
OBJECTIVE: We explored effects of deep brain stimulation (DBS) in patients with Parkinson's disease (PD) on the synergic control of fingers in a multi-finger force production task and of muscles in a task involving vertical posture. METHODS: The finger task involved the four fingers of a hand producing accurate total force followed by a targeted quick force pulse. The postural task involved releasing a load from extended arms. The analysis of synergies was performed within the framework of the uncontrolled manifold hypothesis...
March 9, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29564504/stability-of-vertical-posture-explored-with-unexpected-mechanical-perturbations-synergy-indices-and-motor-equivalence
#9
Momoko Yamagata, Ali Falaki, Mark L Latash
We explored the relations between indices of mechanical stability of vertical posture and synergy indices under unexpected perturbations. The main hypotheses predicted higher posture-stabilizing synergy indices and higher mechanical indices of center of pressure stability during perturbations perceived by subjects as less challenging. Healthy subjects stood on a force platform and held in fully extended arms a bar attached to two loads acting downward and upward. One of the loads was unexpectedly released by the experimenter causing a postural perturbations...
March 21, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29559418/effect-of-auditory-stimulus-on-executive-function-and-execution-time-during-cognitively-demanding-stepping-task-in-patients-with-parkinson-s-disease
#10
Tatsunori Watanabe, Kotaro Saito, Kazuto Ishida, Shigeo Tanabe, Mitsuya Horiba, Shogo Itamoto, Yoshino Ueki, Ikuo Wada, Ippei Nojima
Start hesitation in patients with Parkinson's disease (PD) occurs predominantly during distractive and conflictual situations. The aim of this study was to investigate how differently an auditory stimulus (AS) influences execution function and execution time during a cognitively demanding stepping task in PD patients as compared to healthy controls. PD patients and healthy controls stepped forward in response to a visual imperative stimulus of an arrow. We applied a Simon task that comprised congruent and incongruent conditions...
May 1, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29550640/arm-trunk-coordination-in-wheelchair-initiation-displacement-a-study-of-anticipatory-and-compensatory-postural-adjustments-during-different-speeds-and-directions-of-propulsion
#11
Soufien Chikh, Cyril Garnier, Arnaud Faupin, Antonio Pinti, Samuel Boudet, Fairouz Azaiez, Eric Watelain
Arm-trunk coordination during the initiation of displacement in manual wheelchair is a complex task. The objective of this work is to study the arm-trunk coordination by measuring anticipatory and compensatory postural adjustments. Nine healthy subjects participated in the study after being trained in manual wheelchair. They were asked to initiate a displacement in manual wheelchair in three directions (forward vs. left vs. right), with two speeds (spontaneous vs. maximum) and with two initial hand's positions (hands on thighs vs...
June 2018: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29497374/are-hypometric-anticipatory-postural-adjustments-contributing-to-freezing-of-gait-in-parkinson-s-disease
#12
Christian Schlenstedt, Martina Mancini, Jay Nutt, Amie P Hiller, Walter Maetzler, Günther Deuschl, Fay Horak
Introduction: This study aims at investigating whether impaired anticipatory postural adjustments (APA) during gait initiation contribute to the occurrence of freezing of gait (FOG) or whether altered APAs compensate for FOG in Parkinson's disease (PD). Methods: Gait initiation after 30 s quiet stance was analyzed without and with a cognitive dual task (DT) in 33 PD subjects with FOG (PD+FOG), 30 PD subjects without FOG (PD-FOG), and 32 healthy controls (HC). APAs were characterized with inertial sensors and muscle activity of the tensor fasciae latae (TFL), gastrocnemius, and tibialis anterior was captured with electromyography recordings...
2018: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29476713/best-core-stabilization-for-anticipatory-postural-adjustment-and-falls-in-hemiparetic-stroke
#13
Nam G Lee, Joshua Sung H You, Chung H Yi, Hye S Jeon, Bong S Choi, Dong R Lee, Jae M Park, Tae H Lee, In T Ryu, Hyun S Yoon
OBJECTIVES: To compare the effects of conventional core stabilization and dynamic neuromuscular stabilization (DNS) on anticipatory postural adjustment (APA) time, balance performance, and fear of falls in chronic hemiparetic stroke. DESIGN: Two-group randomized controlled trial with pretest-posttest design. SETTING: Hospital rehabilitation center. PARTICIPANTS: Adults with chronic hemiparetic stroke (N=28). INTERVENTIONS: Participants were randomly divided into either conventional core stabilization (n=14) or DNS (n=14) groups...
February 21, 2018: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/29392774/gait-initiation-is-influenced-by-emotion-processing-in-parkinson-s-disease-patients-with-freezing
#14
Giovanna Lagravinese, Elisa Pelosin, Gaia Bonassi, Federico Carbone, Giovanni Abbruzzese, Laura Avanzino
BACKGROUND: Freezing of gait is a symptom that affects more than 50% of Parkinson's disease (PD) patients and increasing evidence suggests that nonmotor systems (i.e., limbic system) are involved in its underlying mechanisms. OBJECTIVE: The objective of this study was to investigate whether gait initiation characteristics are influenced by emotional stimuli in patients with PD, with or without freezing of gait. METHODS: A total of 44 participants, divided into 3 groups (15 PD patients with and 15 PD patients without freezing of gait and 14 controls), stood on a sensorized mat and were asked to take a step forward in response to a pleasant image and a step backward in response to an unpleasant one (congruent task, low cognitive load) or to take a step backward in response to a pleasant image and a step forward in response to an unpleasant one (incongruent task, high cognitive load)...
April 2018: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29383399/influence-of-dual-task-constraints-on-the-interaction-between-posture-and-movement-during-a-lower-limb-pointing-task
#15
Marcelo Guimarães Silva, Lucas Struber, José Geraldo T Brandão, Olivier Daniel, Vincent Nougier
One of the challenges regarding human motor control is making the movement fluid and at a limited cognitive cost. The coordination between posture and movement is a necessary requirement to perform daily life tasks. The present experiment investigated this interaction in 20 adult men, aged 18-30 years. The cognitive costs associated to postural and movement control when kicking towards a target was estimated using a dual-task paradigm (secondary auditory task). Results showed that addition of the attentional demanding cognitive task yielded a decreased kicking accuracy and an increased timing to perform the movement, mainly during the backswing motion...
April 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29368403/cortical-contributions-to-anticipatory-postural-adjustments-in-the-trunk
#16
Shin-Yi Chiou, Madeleine Hurry, Thomas Reed, Jing Xiao Quek, Paul H Strutton
Voluntary limb movements are associated with increases in trunk muscle activity, some of which occur within a time window considered too fast to be induced by sensory feedback; these increases are termed anticipatory postural adjustments (APAs). Although it is known that the function of APAs is to maintain postural stability in response to perturbations, excitability of the corticospinal projections to the trunk muscles during the APAs remain unclear. Thirty-four healthy subjects performed rapid shoulder flexion in response to a visual cue in standing and lying positions...
January 24, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29339773/postural-adaptations-to-unilateral-knee-joint-hypomobility-induced-by-orthosis-wear-during-gait-initiation
#17
A Delafontaine, P Fourcade, J L Honeine, S Ditcharles, E Yiou
Balance control and whole-body progression during gait initiation (GI) involve knee-joint mobility. Single knee-joint hypomobility often occurs with aging, orthopedics or neurological conditions. The goal of the present study was to investigate the capacity of the CNS to adapt GI organization to single knee-joint hypomobility induced by the wear of an orthosis. Twenty-seven healthy adults performed a GI series on a force-plate in the following conditions: without orthosis ("control"), with knee orthosis over the swing leg ("orth-swing") and with the orthosis over the contralateral stance leg ("orth-stance")...
January 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29332755/investigating-the-anticipatory-postural-adjustment-phase-of-gait-initiation-in-different-directions-in-chronic-ankle-instability-patients
#18
Zahra Ebrahimabadi, Sedigheh Sadat Naimi, Abbas Rahimi, Heydar Sadeghi, Seyed Majid Hosseini, Alireza Akbarzadeh Baghban, Syed Asadullah Arslan
OBJECTIVE: The main objective of the present study was to analyze how supra spinal motor control mechanisms are altered in different directions during anticipatory postural phase of gait initiation in chronic ankle instability patients. It seems that supra spinal pathways modulate anticipatory postural adjustment phase of gait initiation. Yet, there is a dearth of research on the effect of chronic ankle instability on the anticipatory postural adjustment phase of gait initiation in different directions...
January 2018: Journal of Bodywork and Movement Therapies
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
#19
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/29328985/standing-on-a-sliding-board-affects-generation-of-anticipatory-and-compensatory-postural-adjustments
#20
Bing Chen, Yun-Ju Lee, Alexander S Aruin
Postural control is compromised in the presence of body instability. We studied anticipatory and compensatory postural adjustments people use to maintain balance while standing on an unstable surface and performing voluntary arm movements. Nine healthy participants stood on a sliding board (that was either locked and as such motionless or unlocked and as such free to move in the anterior-posterior direction) and performed fast bilateral arms flexion. Arm acceleration, bilateral electromyographic activity (EMG) of the trunk and lower extremity muscles and center of pressure (COP) displacements were recorded and analyzed within the intervals typical for the anticipatory (APAs) and compensatory (CPAs) postural adjustments...
February 2018: Journal of Electromyography and Kinesiology
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