Displaying all 11 publications

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  1. Husin LS, Uttaman A, Hisham HJ, Hussain IHS, Jamil MRM
    Med J Malaysia, 1999 Sep;54(3):320-4.
    PMID: 11045057
    The aim of this study was to find out the indicator as a marker of person who are exposed to pesticides (organophospate). Up to now the serum cholinesterase is used as a marker. This new method will not taking blood vein since this be the obstacle in conducting research in a rural area.
    Matched MeSH terms: Sensory Thresholds/drug effects*
  2. Lee JY, Saat M, Chou C, Hashiguchi N, Wijayanto T, Wakabayashi H, et al.
    J Therm Biol, 2010 Feb;35(2):70-76.
    PMID: 28799915 DOI: 10.1016/j.jtherbio.2009.11.002
    The purpose of this study was to investigate ethnic differences in cutaneous thermal sensation thresholds and the inter-threshold sensory zone between tropical (Malaysians) and temperate natives (Japanese). The results showed that (1) Malaysian males perceived warmth on the forehead at a higher skin temperature (Tsk) than Japanese males (p<0.05), whereas cool sensations on the hand and foot were perceived at a lower Tsk in Malaysians (p<0.05); (2) Overall, the sensitivity to detect warmth was greater in Japanese than in Malaysian males; (3) The most thermally sensitive body region of Japanese was the forehead for both warming and cooling, while the regional thermal sensitivity of Malaysians had a smaller differential than that of Japanese; (4) The ethnic difference in the inter-threshold sensory zone was particularly noticeable on the forehead (1.9±1.2C for Japanese, 3.2±1.6°C for Malaysians, p<0.05). In conclusion, tropical natives had a tendency to perceive warmth at a higher Tsk and slower at an identical speed of warming, and had a wider range of the inter-threshold sensory zone than temperate natives.
    Matched MeSH terms: Sensory Thresholds
  3. Treshi-marie Perera A, Newport R, McKenzie KJ
    Exp Brain Res, 2015 Nov;233(11):3153-61.
    PMID: 26195170 DOI: 10.1007/s00221-015-4384-8
    Research has suggested that altering the perceived shape and size of the body image significantly affects perception of somatic events. The current study investigated how multisensory illusions applied to the body altered tactile perception using the somatic signal detection task. Thirty-one healthy volunteers were asked to report the presence or absence of near-threshold tactile stimuli delivered to the index finger under three multisensory illusion conditions: stretched finger, shrunken finger and detached finger, as well as a veridical baseline condition. Both stretching and shrinking the stimulated finger enhanced correct touch detections; however, the mechanisms underlying this increase were found to be different. In contrast, the detached appearance reduced false touch reports-possibly due to reduced tactile noise, as a result of attention being directed to the tip of the finger only. These findings suggest that distorted representations of the body could have different modulatory effects on attention to touch and provide a link between perceived body representation and somatosensory decision-making.
    Matched MeSH terms: Sensory Thresholds/physiology
  4. Jalil RA, Cornick DE
    J Nihon Univ Sch Dent, 1994 Sep;36(3):175-82.
    PMID: 7989959
    It has been postulated that subjects with high levels of oral sensory perception and motor ability are able to achieve higher standards of oral hygiene even under different dietary regimes. In this study, eleven dental personnel volunteers were started on a low-sucrose diet for one week, followed by a high-sucrose diet for another week, while eleven others followed a reverse-order dietary regime. Oral sensory perception and motor ability were assessed by the oral stereognosis test and a test for oral motor ability. There was a greater trend for subjects to have more plaque on their teeth when they were on the high-sucrose diet, even when normal oral hygiene procedures were taken. There were no significant correlations between the state of oral hygiene and levels of oral sensory perception and motor ability. These results do not support the hypothesis that subjects with high levels of oral sensory perception and motor ability are likely to achieve better oral hygiene.
    Matched MeSH terms: Sensory Thresholds/physiology
  5. Dane AB, Teh E, Reckelhoff KE, Ying PK
    J Manipulative Physiol Ther, 2017 09;40(7):511-516.
    PMID: 29079256 DOI: 10.1016/j.jmpt.2017.06.011
    OBJECTIVES: The aim of this study was to investigate if there were differences in the two-point discrimination (2-PD) of fingers among students at different stages of a chiropractic program.

    METHODS: This study measured 2-PD thresholds for the dominant and nondominant index finger and dominant and nondominant forearm in groups of students in a 4-year chiropractic program at the International Medical University in Kuala Lumpur, Malaysia. Measurements were made using digital calipers mounted on a modified weighing scale. Group comparisons were made among students for each year of the program (years 1, 2, 3, and 4). Analysis of the 2-PD threshold for differences among the year groups was performed with analysis of variance.

    RESULTS: The mean 2-PD threshold of the index finger was higher in the students who were in the higher year groups. Dominant-hand mean values for year 1 were 2.93 ± 0.04 mm and 1.69 ± 0.02 mm in year 4. There were significant differences at finger sites (P < .05) among all year groups compared with year 1. There were no significant differences measured at the dominant forearm between any year groups (P = .08). The nondominant fingers of the year groups 1, 2, and 4 showed better 2-PD compared with the dominant finger. There was a significant difference (P = .005) between the nondominant (1.93 ± 1.15) and dominant (2.27 ± 1.14) fingers when all groups were combined (n = 104).

    CONCLUSIONS: The results of this study demonstrated that the finger 2-PD of the chiropractic students later in the program was more precise than that of students in the earlier program.

    Matched MeSH terms: Sensory Thresholds*
  6. Lubis SH, El Sersi M, Hussein SH, Sakian NI, Salleh R, Rafai J, et al.
    Asia Pac J Public Health, 2008 Oct;20 Suppl:162-5.
    PMID: 19533876
    A cross sectional study was conducted to investigate the effects of pesticide exposure (organophosphate and carbamate) using nerve conductive velocity, current perception threshold (CPT). Cluster random sampling was employed to recruit 64 paddy farmers and 22 fishermen in June 2006. The duration of pesticide exposure was between (5-20) years. The CPT values were measured using Neurometer CPT/Eagle, on the index finger and the great toe with three neuroselective frequencies range (2000, 250, and 5 Hz). The results showed that at the three different frequencies, the CPT values were significantly elevated among farmers on both the medial and peroneal nerves (P < .002). The measurement of CPT can be used as a biomarker to determine and monitor the effects of organophosphate and carbamate exposure among workers who may have been exposed.
    Matched MeSH terms: Sensory Thresholds/drug effects; Sensory Thresholds/physiology
  7. Foo SK, Cubbidge RP, Heitmar R
    Eur J Ophthalmol, 2021 Jul;31(4):1870-1876.
    PMID: 32468855 DOI: 10.1177/1120672120926455
    BACKGROUND: Numerous fast threshold strategies have been developed in perimetry which use maximum likelihood approaches to estimate the threshold. A recent approach to threshold estimation has been developed estimating the threshold from a limited number of test points which further reduces examination time. This strategy, SPARK, has not been compared to the SITA strategy. The aim of this study was to compare SPARK with SITA in a normal cohort to evaluate within and between strategy agreement in threshold estimates.

    METHODS: A total of 83 normal subjects each underwent two visual field examinations with SITA and SPARK on two separate occasions on a randomly selected eye. The eye examined and the order of strategy examined first was randomised but remained constant over the two perimetry visits.

    RESULTS: Visual field examination with SPARK Precision was on average 33% faster than SITA Standard. A positive correlation between group mean sensitivities of SITA Standard and SPARK Precision (rho = 0.713, p 

    Matched MeSH terms: Sensory Thresholds
  8. Husain S, Hamid IA, Zahedi FD, Hamizan AKW
    Saudi Med J, 2021 Nov;42(11):1209-1216.
    PMID: 34732553 DOI: 10.15537/smj.2021.42.11.20210529
    OBJECTIVES: To assess olfactory abilities using a culturally adapted Sniffin' Sticks smell test in different age groups.

    METHODS: This was a cross-sectional study, conducted at Otorhinolaryngology outpatient clinic of Universiti Kebangsaan Malaysia Medical Centre, Secondary Science School, and Children Learning Centre in Kuala Lumpur, Malaysia, from August 2019 until December 2021.

    RESULTS: In 450 healthy participants, the cut-off points of the threshold discrimination identification (TDI) scores at the 10th percentile for olfactory abilities were 19 in children, 30.1 in adolescents, 32.1 in young adults, 31.1 in middle-aged adults, and 28.6 in older adults. The children had significantly lower olfactory abilities, with the Bonferroni post-hoc tests of p<0.001. The young adults had higher olfactory abilities than older adults (p<0.05). The results showed that the identification score was highest in middle-aged adults (p<0.001). The discrimination score was the highest in young adults (p<0.001). The best odor threshold performance was observed in adolescents (p<0.001). The TDI score showed a significant difference in olfactory abilities between men and women (p=0.001).

    CONCLUSION: Using a culturally adapted smell test, our population was able to identify, discriminate, and perceive odorants better than the European population. This data will help clinicians and researchers with a tool to reliably establish the correct results of olfactory function in our population. Women had better olfactory abilities than men.

    Matched MeSH terms: Sensory Thresholds
  9. Daud R, Maeda S, Kameel NN, Ripin MY, Bakrun N, Md Zein R, et al.
    Ind Health, 2004 Apr;42(2):189-95.
    PMID: 15128168
    The purpose of this paper is to clarify the reference vibrotactile perception thresholds (VPT) for healthy people in Malaysia. The measurement equipment standard, ISO 13091-1, of the vibrotactile perception thresholds for the assessment of nerve dysfunction and the analysis and interpretation of measurements at the fingertips standard, ISO 13091-2, were published in ISO/TC108/SC4/WG8 on 2001 and 2003 individually. In the ISO 13091-2 standard, the reference VPT data were obtained from few research papers. Malaysian people's VPT data don't include to this standard. In Malaysia, when the VPT is using to diagnose of the hand-arm vibration syndrome, the reference VPT data need to compare with the worker's ones. But, Malaysia does not have the reference VPT data yet. So, in this paper, the VPT was measured by using ISO 13091-1 standard equipment to obtain the reference data for Malaysian people. And these data were compared with the ISO reference data on the ISO 13091-2 standard. From the comparison of these data, it was clear that the Malaysian healthy people's VPT data were consistent with the reference data of the ISO 13091-2 standard.
    Matched MeSH terms: Sensory Thresholds/physiology*
  10. Ismail SA, Sharanjeet-Kaur, Mutalib HA, Ngah NF
    J Optom, 2015 Oct-Dec;8(4):266-72.
    PMID: 26025808 DOI: 10.1016/j.optom.2015.04.001
    PURPOSE: To determine the influence of age and gender on macular sensitivity to light in healthy subjects of 4 age groups using the MP-1 microperimeter.
    METHODS: A prospective study was carried out on 50 healthy subjects (age range: 18-60 years) divided into 4 age groups; 18-30 years, 31-40 years, 41-50 years and 51-60 years. Full-threshold microperimetry of the central 10° of retina was performed utilizing 32 points with the MP-1. Macula area was divided into four quadrants, which were superior nasal (SN), inferior nasal (IN), inferior temporal (IT) and superior temporal (ST).
    RESULTS: Total mean sensitivity at 10° for age groups 18-30 years, 31-40 years, 41-50 years and 51-60 years were 19.46 ± 0.30, 19.40 ± 0.39, 19.47 ± 0.35 and 18.73 ± 0.75 (dB), respectively. There was a significant difference in total mean retinal sensitivity at 10° and at the four quadrants with age but not for gender. The retinal sensitivity was highest in the IT quadrant and lowest in the SN quadrant for all age groups. The linear regression analysis revealed that there was a 0.019 dB, 0.016 dB, 0.022 dB, 0.029 dB and 0.029 dB per year age-related decline in mean macular sensitivity within the central 10° diameter in the SN, IN, IT and ST quadrants respectively.
    CONCLUSION: Among normal healthy subjects, there was a linear decline in retinal light sensitivity with increasing age with the highest reduction in the superior nasal quadrant and lowest in the inferior temporal quadrant.
    Matched MeSH terms: Sensory Thresholds/physiology
  11. Lasekan O
    J Sci Food Agric, 2013 Mar 30;93(5):1055-61.
    PMID: 22936608 DOI: 10.1002/jsfa.5846
    Volatile compounds play a key role in determining the sensory appreciation of vegetable oils. In this study a systematic evaluation of odorants responsible for the characteristic flavour of roasted tigernut oil was carried out.
    Matched MeSH terms: Sensory Thresholds
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