Displaying publications 1 - 20 of 150 in total

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  1. Rahman IA, Mohamad N, Rohani JM, Zein RM
    Ind Health, 2018 Nov 21;56(6):492-499.
    PMID: 30210096 DOI: 10.2486/indhealth.2018-0043
    Prolonged standing can cause discomfort on the body of the workers and can lead to injury and occupational disease. One of the ergonomic intervention is through improving the work-rest scheduling. The purpose of this study are to identify the fatigue level from the perception of the worker and to investigate the impact of the work-rest scheduling to the standing workers for 12 h working time with a different gender. This study involved two methods which are self-assessment of the worker and direct measurement by using electromyography (EMG). For self-assessment, 80 workers have been interviewed using questionnaire in order to identify the fatigue level. For direct measurement, EMG was attached to the 15 selected workers at their respective leg and lower back to analyse the muscle efforts. In terms of perception, the results show the discomfort and fatigue level at the lower body region in the following order as foot ankle, lower back and leg. There is a significant difference between gender on discomfort pain for foot ankle and leg. The results show short frequent break by 10 min can reduce the fatigue at the leg and infrequent long break is preferable in order to reduce the fatigue at the lower back. In conclusion, it was found that prolonged standing affect the muscle fatigue and discomfort especially lower extremities such as foot ankle, lower back and leg. Besides that, different type of work rest scheduling and gender have significant result towards the muscle fatigue development.
    Matched MeSH terms: Posture/physiology
  2. Abd Rahman MN, Aziz FA, Yusuff RM
    J Hum Ergol (Tokyo), 2010 Jun;39(1):53-6.
    PMID: 21922791 DOI: 10.11183/jhe.39.53
    The purpose of this study was to investigate the prevalence of body part symptoms and sources of injury/discomfort among workers in a car tyre service centre. Questionnaire survey and interview session were used to identify the level of body discomfort areas and sources of injury or discomfort. From questionnaire survey findings, 12 of respondents have body discomfort in the neck (66.7%%), shoulder (83.3%), elbow/forearm (75%), hand/wrist (91.7%), knee (58.3%), lower leg (75%), ankle/foot (33%) and lower back (30%). The main sources of injury/discomfort in the workplace were poor body posture (75%), bending the back (75%), highly repetitive motions (75%), lifting heavy objects (83.3%), the long-term standing (66.7%), long-term squatting (58.3%), bending the neck (66.7%) and high hand force (58.3%). About 50% reported that poor workplace design also contributed to injury while 41.7% mentioned the use of hand tools. To address modifying the ergonomic hazards, engineering controls and administrative controls can be used. The study will be useful to ergonomists, researchers, consultants, workshop managers, maintenance workers and others concerned with identifying body part symptoms and sources of injury/discomfort at the workplace.
    Matched MeSH terms: Posture
  3. Hashim AM, Dawal SZ, Yusoff N
    Work, 2012;41 Suppl 1:827-31.
    PMID: 22316824 DOI: 10.3233/WOR-2012-0249-827
    The objective of this study is to compare the evaluation of postural analysis between a self-report questionnaire and physical assessments methods for students aged 13 to 15 years old in school workshop. 336 students were volunteered as participants to fill in the questionnaire and being observed in the workshop. Total of 104 positions were selected and analyzed while students performing their tasks. Questionnaire data was examined to specify the prevalence of postural stress symptoms. The relationship of postural stress by physical assessment methods (RULA and REBA methods) was defined to identify the risk level of students' working posture. From the results, comparison of four factors categorized from total of 22 questions among ages, the mean values were lower for 13 years old students meaning that they were faced higher posture problems while using the workstation. The obtained results from both physical assessment methods and questionnaire analysis have identified 13 years old students faced higher risk exposure. Analysis results emphasized the fact that self-reports questionnaire method has almost accurate as postural evaluation methods to identify physical risks in workplace. The result also shows that an intervention is needed to overcome the posture problems.
    Matched MeSH terms: Posture*
  4. Inbasegaram K, Yong BH
    Med J Malaysia, 1985 Sep;40(3):233-8.
    PMID: 3842718
    One hundred (100) consecutive patients who underwent spinal analgesia for surgical and orthopaedic operations were studied. Postural headache occurred in 9% of patients, the majority in those cases where large bore (l8G to 21G) needless were used. No other neurological complications were encountered. Conservative measures provided some relief of the headache. Epidural blood patch was found to be effective.
    Matched MeSH terms: Posture
  5. Loo HS, Yeow PH
    Appl Ergon, 2015 Nov;51:383-91.
    PMID: 26154237 DOI: 10.1016/j.apergo.2015.06.007
    The research aims to address the physically loading task and quality and productivity problems in the brazing of coils of air-handler units. Eight operators participated in two intervention studies conducted in a factory in Malaysia to compare the status quo brazing with (1) the use of a new twin-brazing torch that replaced the single-brazing gun and (2) brazing in a sitting position. The outcome measures are related to quality, productivity, monetary costs, body postures and symptoms. After baseline, Interventions I and II were applied for 3 months respectively. The results show a 58.9% quality improvement, 140% productivity increase and 113 times ROI. There was also a reduction in poor work postures e.g. in the raising of the arms and shoulders; bending, twisting and extending of the neck; and bending of left and right wrists, and the back. This research can be replicated in other factories that share similar processes.
    Matched MeSH terms: Posture
  6. Soo SY, Ang WS, Chong CH, Tew IM, Yahya NA
    Work, 2023;74(2):469-476.
    PMID: 36278379 DOI: 10.3233/WOR-211094
    BACKGROUND: There is an increasing concern about musculoskeletal disorders (MSD), resulting from occupational health hazards among dentists. Dentists who are susceptible to occupational health hazards could develop cumulative trauma disorders, lead to absenteeism from work, loss of productivity and performance or even long-term disability.

    OBJECTIVE: This study aims to determine the prevalence of musculoskeletal disorders among dentists, explore the risk factors and identify the ergonomic preventive measures for dental professionals.

    METHODS: Articles published between 2008-2020 were searched in scientific databases (MEDLINE, PubMed, Scopus and Cochrane Library). The Critical Appraisal Skills Programme Systematic Review Checklist was used to assess the quality of the studies.

    RESULTS: Eighteen studies were found to be suitable in the final review. Relevant data was extracted and summarized from the included studies. The annual prevalence of musculoskeletal disorders in any body site ranged between 68% and 100%. The most predominant regions for musculoskeletal disorders among dental professionals were identified to be the lower back (29% to 94.6%), shoulder (25% to 92.7%), and neck (26% to 92%). The most frequently reported risk factors of MSDs were the individual characteristic female gender (57.1%), followed by awkward working postures (50%), long working experience (50%) and being dental specialists (42.9%). Several preventive measures were identified as the most effective ways in preventing MSDs, the use of magnification (40%) and regular physical activity (40%).

    CONCLUSIONS: This review reported a high prevalence of musculoskeletal disorders (MSD) among dentists. It critically updates and adds the latest evidence on occupational ergonomics among dentists.

    Matched MeSH terms: Posture
  7. Fu, Tzeh Long, Ong, Kien Chai, Wong, Kum Thong
    Neurology Asia, 2015;20(4):349-354.
    MyJurnal
    We have developed and characterised a mouse model of Japanese encephalitis virus (JEV) infection via
    footpad inoculation in order to better mimic viral transmission by mosquito bites. Two-week-old and
    5-week-old mice consistently developed signs of infection such as ruffled fur, weight loss, hunchback
    posture, tremors, mask-like facies and occasionally, hindlimb paralysis at 4 days post infection (dpi)
    and 11-13 dpi, respectively. Most of the animals died within 24 to 48 hours following the onset of signs
    of infection, with mortalities of 100% and 33.3% in 2-week-old and 5-week-old mice, respectively.
    Mild meningitis and variable parenchymal inflammation with formation of microglial nodules, focal
    necrosis and neuronophagia, and perivascular cuffing by inflammatory cells were observed in the
    caudate nucleus, putamen, thalamus, cerebral cortex, brainstem, and spinal cord. Viral antigens/RNA
    were demonstrated by immunohistochemisty and in situ hybridization, respectively, in most of these
    areas as well as in the hippocampus and cerebellum, albeit more focally. The pathological findings in
    this mouse model were generally similar to human Japanese encephalitis (JE) and other established JE
    models but perhaps, compared to other JEV mouse models, it demonstrates lethal encephalitic infection
    more consistently. We believe that our mouse model should be useful to study the pathogenesis of JE,
    and for testing anti-viral drugs and vaccines
    Matched MeSH terms: Posture
  8. Lope RJ, Kong WK, Lee VW, Tiew WT, Wong SY
    Med J Malaysia, 2010 Mar;65(1):45-8.
    PMID: 21265248 MyJurnal
    Several modifiable risk factors for sudden infant death syndrome (SIDS) have been identified such as sleeping prone or on the side, sleeping on a soft surface, bed-sharing, no prenatal care and maternal ante-natal smoking. A cross-sectional survey of infant sleep and care practices was conducted among parents of babies aged below 8 months to determine the prevalence and predictors of non-supine sleep position and the prevalence of other high-risk infant care practices for SIDS. Of 263 infants, 24.7% were placed to sleep in the non-supine position and age of infants was a factor positively associated with this (adjusted odds ratio 1.275, 95% CI=1.085, 1.499). The most common modifiable risk factor was the presence of soft toys or bedding in the infants' bed or cot (89.4%). Results from this study indicate that although the predominant sleep position of Malaysian infants in this population is supine, the majority of infants were exposed to other care practices which have been shown to be associated with SIDS.
    Matched MeSH terms: Posture*
  9. Ku PX, Abu Osman NA, Wan Abas WAB
    J Biomech, 2016 Dec 08;49(16):3943-3948.
    PMID: 27865478 DOI: 10.1016/j.jbiomech.2016.11.006
    Balance control plays an important role in maintaining daily activity. However, studies on postural control among middle-aged adults are scarce. This study aims (i) to examine directional control (DCL) and electromyography activity (EMG) for different stability levels, and (ii) to determine left-right asymmetry for DCL and muscle activity among sedentary middle-aged adults. Twenty healthy, middle-aged adults (10 males, 10 females; age=50.0±7.5yrs; body height: 1.61±0.10m; body mass: 70.0±14.5kg) participated in the study. EMG for left and right side of rectus femoris (RF), biceps femoris (BF), and medial gastrocnemius (MG) were recorded. Two-way repeated measures analysis of variance was used to assess the effect of dynamic level on DCL and EMG, whereas independent sample t-test was conducted to analyse the asymmetries of DCL and EMG for the left and right leg. When the dynamic tilt surface increased, DCL scores significantly decreased (except forward, forward-rightward, and backward-leftward direction) and only RF muscle indicated significant differences. Left-right asymmetry was found in BF and MG muscles. No significant gender difference was observed in DCL and EMG. These data demonstrated that increased dynamic tilt surface may increase the displacement of center of pressure of certain directions, and stimulate RF activity in dynamic stance among sedentary middle-aged adults. Further studies should be conducted to examine the dynamic stance and muscle activity of the lower limb in age-matched patient groups with balance abnormalities.
    Matched MeSH terms: Posture/physiology*
  10. Ku PX, Abu Osman NA, Wan Abas WA
    Gait Posture, 2014 Feb;39(2):672-82.
    PMID: 24331296 DOI: 10.1016/j.gaitpost.2013.07.006
    Postural control has been widely evaluated for the normal population and different groups over the past 20 years. Numerous studies have investigated postural control in quiet standing posture among amputees. However, a comprehensive analysis is lacking on the possible contributing factors to balance. The present systematic review highlights the current findings on variables that contribute to balance instability for lower extremity amputees. The search strategy was performed on PubMed, Web of Science, Medline, Scopus, and CINAHL and then followed by additional manual searching via reference lists in the reviewed articles. The quality of the articles was evaluated using a methodological quality assessment tool. This review included and evaluated a total of 23 full-text articles. Despite the inconsistencies in the methodological design of the studies, all articles scored above the acceptable level in terms of quality. A majority of the studies revealed that lower extremity amputees have increased postural sway in the standing posture. Asymmetry in body weight, which is mainly distributed in the non-amputated leg, was described. Aside from the centre of pressure in postural control, sensory inputs may be a related topic for investigation in view of evidence on their contribution, particularly visual input. Other balance-related factors, such as stump length and patients' confidence level, were also neglected. Further research requires examination on the potential factors that affect postural control as the information of standing postural is still limited.
    Matched MeSH terms: Posture/physiology*
  11. Ku PX, Abu Osman NA, Yusof A, Wan Abas WA
    J Biomech, 2012 Jun 1;45(9):1638-42.
    PMID: 22507349 DOI: 10.1016/j.jbiomech.2012.03.029
    Postural stability is crucial in maintaining body balance during quiet standing, locomotion, and any activities that require a high degree of balance performance, such as participating in sports and dancing. Research has shown that there is a relationship between stability and body mass. The aims of this study were to examine the impact that two variables had on static postural control: body mass index (BMI) and gender. Eighty healthy young adults (age=21.7±1.8 yr; height=1.65±0.09 m; mass=67.5±19.0 kg) participated in the study and the static postural control was assessed using the Biodex Balance System, with a 20 Hz sampling rate in the bipedic stance (BLS) and unipedic stance (ULS) for 30s. Five test evaluations were performed for each balance test. Postural control was found to be negatively correlated with increased adiposity, as the obese BMI group performed significantly poorer than the underweight, normal weight and overweight groups during BLS and ULS tests. The underweight, normal weight and overweight groups exhibited greater anterior-posterior stability in postural control during quiet stance. In addition, female displayed a trend of having a greater postural sway than male young adults, although it was evidenced in only some BMI groups. This study revealed that BMI do have an impact on postural control during both BLS and ULS. As such, BMI and gender-specific effects should be taken into consideration when selecting individuals for different types of sporting activities, especially those that require quiet standing.
    Matched MeSH terms: Posture/physiology*
  12. Ku PX, Abu Osman NA, Yusof A, Wan Abas WA
    PLoS One, 2012;7(7):e41539.
    PMID: 22848523 DOI: 10.1371/journal.pone.0041539
    Postural balance is vital for safely carrying out many daily activities, such as locomotion. The purpose of this study was to determine how changes in normal standing (NS) and standing with toe-extension (SWT) impact postural control during quiet standing. Furthermore, the research aimed to examine the extent to which the effect of these factors differed between genders.
    Matched MeSH terms: Posture/physiology*
  13. Abdulazeez Uba Muhammad, Kassim Abdulrahman Abdullah, Waleed Fekry Faris
    MyJurnal
    The best commonly applied approach in seating ergonomics is the concept that the seat must fit the sitter.
    Understanding of population anthropometry is necessary because, in the mass vehicle market, a single seat should fit
    a huge portion of the population. This research work proposes some automotive seat fit parameters based on a
    representative Nigerian anthropometric data, to ensure an optimum fit between the vehicle seats and the occupants,
    as well as providing adequate accommodation. Anthropometric data of 863 Nigerians captured with special emphasis
    on the dimensions that are applicable in automotive seat design. A comparison made between the data obtained and
    that of five other countries. The proposed dimensions includes: seat cushion width (475mm); seat cushion length
    (394mm); seat height (340mm); seat lateral location (583mm); seat back height (480mm); seat back width (427mm);
    armrest height (246mm); headrest height (703mm); armrest surface length (345mm); backrest width (thoracic level)
    (524mm); seat adjustment (186mm); backrest width (lumbar level) (475mm) and distance between armrests
    (475mm). A comparison made between the proposed dimensions and those recommended by four other scholars for
    other populations. Finally, an ergonomic automotive seat suitable for the Nigerian population was designed using
    AutoCAD 2016 software based on the proposed established dimensions.
    Matched MeSH terms: Posture
  14. Faezah Sabirin, Siti Sarah Abdul Ahmad, W. Zahira Akmal W. Kamarudin
    Compendium of Oral Science, 2015;2(1):32-39.
    MyJurnal
    Background: Muscular pain is the most common symptom associated to muscular skeletal disorders (MSDs). Dentists were exposed to ergonomic hazards while treating the patients. Without proper dental ergonomics, they are predisposed to the MSDs. Objective: This present study was designed to analyse the prevalence of muscular pain among practising dentists in Universiti Teknologi MARA (UiTM) and it relatedness to ergonomic factors. Methodology: A total of 25 dentists were participated in this pilot study. The inclusion criteria include working experience of at least six months and those who were readily diagnosed with musculoskeletal disorders were excluded. A self-administered questionaire was employed to gather demogaphic informations and close ended (“yes” or “no”) questions were asked to assess the muscular pain experienced in the last 12 months. The collected data were then analysed statistically. Result: The result showed a 100% response rate. 92% of the respondents were reported to experience muscular pain, particularly on the upper body parts. Only maintenance of same postures without microbreaks and performing torsions or cervical flexions to improve vision of oral cavity correlate significantly (P
    Matched MeSH terms: Posture
  15. Skowron Volponi MA, Volponi P
    Zookeys, 2017.
    PMID: 29133989 DOI: 10.3897/zookeys.692.13587
    A new species of clearwing moth,Pyrophleps ellawiSkowron Volponi,sp. n., is described from Peninsular Malaysia. Information on the habitat, time and conditions of occurrence, flight and mud-puddling behaviour, functional morphology, and DNA barcode are also provided. Photographs and a supplementary video from the wild demonstrate the postures and behaviour of this species ofPyrophleps, whose remaining members were described only on the basis of pinned specimens. This is the first record of this genus in Peninsular Malaysia.
    Matched MeSH terms: Posture
  16. Varatharajoo, R.
    ASM Science Journal, 2011;5(2):153-155.
    MyJurnal
    Malaysia has adopted various strategies in developing its space sector. Indigenous space technologies would enable a sustainable growth of the space field and at the same time develop the strategic space technologies. Therefore, issues related to the current space research level are fundamentally crucial to be highlighted. Subsequently, the space focus areas can be derived in order to meet the expectations of the national and international space technology growth requirements, which are moving on to a stronger posture in R&D. In the absence of a strong R&D national space industry leadership, the Malaysian space sector remains in a traditional downstream mode of the world space technology supply chain ever since. The space technology supply chain can be divided into the ground segment and the space segment. This paper examines the current space research activities in Malaysia within the framework of the space technology supply chain. As a result, a preliminary gap in the overview of space research in Malaysia is established.
    Matched MeSH terms: Posture
  17. Khan SJ, Khan SS, Usman J
    Foot (Edinb), 2019 Jun;39:122-128.
    PMID: 30580888 DOI: 10.1016/j.foot.2018.06.002
    BACKGROUND: Toe-in and toe-out foot positions have not yet been tested for dynamic balance and risk of fall. The aim of this study was to investigate the effects of these two modifications on static and dynamic postural stability and risk of fall through instrumental (Biodex Balance System®) and functional (timed up and go-TUG test) tools.

    METHODOLOGY: Twenty healthy adults (8 males, 12 females, age: 29±4.10years, BMI: 21.56±2.36kg/m2) participated in this study. Static and dynamic (levels 8 and 2) balance with single stance and double stance and dynamic (level 8 and levels 6-2) for risk of fall with double stance were tested with the Biodex Balance System with three self-selected feet positions: straight (13.8°), toe-out (35.6°) and toe-in (-11.9°) for each test condition. Additionally, TUG test was performed with toe-out and toe-in gait.

    RESULTS: The results of repeated measures ANOVA showed significant differences (p<0.05) between straight and modified toe angles in balance at dynamic level 2 with both double and single stance conditions. Significant differences (p<0.001) were also found in TUG scores for the test conditions.

    CONCLUSION: Toe-in and toe-out gait modifications have significant effects on balance at higher levels of platform tilt and functional balance. Further investigations with knee osteoarthritis patients and electromyography may provide insight in balancing strategies adopted by the body in toe-out and toe-in gait.

    Matched MeSH terms: Posture/physiology*
  18. Ling, Sui Hui, Chua, Soh Yian, Habsah Razak, Muhamad Rais Abdullah, Wong, See Chang, Toh, Teck Hock
    Int J Public Health Res, 2011;1(2):146-151.
    MyJurnal
    Introduction Children with cerebral palsy (CP) are often prescribed Rehabilitation and Seating Systems (RSS) to assist in daily activities, posture improvement and prevention of muscular-skeletal complications. In Sarawak, a special project to produce RSS was started under a partnership of a Japanese physiotherapist, health department and the community using local material.Aim To document the RSS project and to determine usefulness and costaffordability of these systems for cerebral palsy children and their families.
    Methods The details of RSS manufactured were retrieved from the clinic notes and secretary file. Parents of children who received the seating systems between July 2004 and September 2008 were invited to complete a 5-point Global Parental Perception Questionnaire (GPPQ) between December 2008 and January 2009.
    Results 277 RSS were manufactured between July 2004 and February 2011 (which included modified wheel chair, wooden chair, corner chair, buggy chair and standing frame), and used by children all over Sarawak. Parents of 73 children who used the seating systems completed the 5-points GPPQ. Ten families required full sponsorship. Children spent more time sitting up and brought outdoor more often after the systems became available. Majority of parents reported positive experience in their children with sitting ability, smiles, interaction with people, learning skills and easiness of doing physiotherapy. No change was noted with passing of motion drooling / oral secretion. Most parents agreed that the cost was affordable and worth paying.
    Conclusions A community based initiative to manufacture RSS by using locally available material and skill, at affordable price for the parents was feasible and useful for the family/children with CP.
    Matched MeSH terms: Posture
  19. Goh CH, Ng SC, Kamaruzzaman SB, Chin AV, Poi PJ, Chee KH, et al.
    Medicine (Baltimore), 2016 May;95(19):e3614.
    PMID: 27175670 DOI: 10.1097/MD.0000000000003614
    To evaluate the utility of blood pressure variability (BPV) calculated using previously published and newly introduced indices using the variables falls and age as comparators.While postural hypotension has long been considered a risk factor for falls, there is currently no documented evidence on the relationship between BPV and falls.A case-controlled study involving 25 fallers and 25 nonfallers was conducted. Systolic (SBPV) and diastolic blood pressure variability (DBPV) were assessed using 5 indices: standard deviation (SD), standard deviation of most stable continuous 120 beats (staSD), average real variability (ARV), root mean square of real variability (RMSRV), and standard deviation of real variability (SDRV). Continuous beat-to-beat blood pressure was recorded during 10 minutes' supine rest and 3 minutes' standing.Standing SBPV was significantly higher than supine SBPV using 4 indices in both groups. The standing-to-supine-BPV ratio (SSR) was then computed for each subject (staSD, ARV, RMSRV, and SDRV). Standing-to-supine ratio for SBPV was significantly higher among fallers compared to nonfallers using RMSRV and SDRV (P = 0.034 and P = 0.025). Using linear discriminant analysis (LDA), 3 indices (ARV, RMSRV, and SDRV) of SSR SBPV provided accuracies of 61.6%, 61.2%, and 60.0% for the prediction of falls which is comparable with timed-up and go (TUG), 64.4%.This study suggests that SSR SBPV using RMSRV and SDRV is a potential predictor for falls among older patients, and deserves further evaluation in larger prospective studies.
    Matched MeSH terms: Posture/physiology
  20. Saedon NI, Zainal-Abidin I, Chee KH, Khor HM, Tan KM, Kamaruzzaman SK, et al.
    Clin Auton Res, 2016 Feb;26(1):41-8.
    PMID: 26695401 DOI: 10.1007/s10286-015-0327-5
    To determine the magnitude of postural blood pressure change, differences in ECG between fallers and non-fallers were measured. Postural blood pressure change is associated with symptoms of dizziness, presyncope, and syncope.
    Matched MeSH terms: Posture
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