hig.sePublications
Change search
Link to record
Permanent link

Direct link
BETA
Domkin, Dmitry
Publications (10 of 20) Show all publications
Richter, H., Domkin, D., Elcadi, G. H., Andersson, H. W., Högberg, H. & Englund, M. (2019). A Comparison of Mental and Visual Load Resulting from Semi-automated and Conventional Forest Forwarding: An Experimental Machine Simulation Study (827ed.). In: Sebastiano Bagnara Riccardo Tartaglia · Sara Albolino Thomas Alexander · Yushi Fujita (Ed.), Bagnara S., Tartaglia R., Albolino S., Alexander T., Fujita Y. (Ed.), Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018): Volume X: Auditory and Vocal Ergonomics, Visual Ergonomics, Psychophysiology in Ergonomics, Ergonomics in Advanced Imaging. Paper presented at 20th Congress of the International Ergonomics Association, IEA 2018, 26-30 August 2018, Florence, Italy (pp. 199-208). Cham, X
Open this publication in new window or tab >>A Comparison of Mental and Visual Load Resulting from Semi-automated and Conventional Forest Forwarding: An Experimental Machine Simulation Study
Show others...
2019 (English)In: Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018): Volume X: Auditory and Vocal Ergonomics, Visual Ergonomics, Psychophysiology in Ergonomics, Ergonomics in Advanced Imaging / [ed] Bagnara S., Tartaglia R., Albolino S., Alexander T., Fujita Y., Cham, 2019, 827, Vol. X, p. 199-208Conference paper, Published paper (Refereed)
Abstract [en]

The purpose of the present study was to extend the knowledge offunctional linkages between visual and mental load, performance, and prefrontalcortex (PFC) activity, during forestry forwarding work. Eleven healthy participants,range 21–51 years old, with a minimum of 1-year work experience,carried out the task of loading logs along a standardized path in a machinesimulator during two counterbalanced test conditions: (i) conventional cranecontrol, and; (ii) semi-automated crane control. Mental load was assessed byquantification of oxygenated hemoglobin (HbO2) concentration changes overthe right dorsolateral prefrontal cortex (dlPFC) via non-invasive functional nearinfrared spectrometry (fNIRS). Visual, autonomic, and motoric control variableswere measured and analyzed in parallel along with the individual level of performance.Linear Mixed Models (LMM) analysis indicated more mental loadduring conventional crane work. Collectively, our data suggest that fNIRS is aviable tool which can be used in neuroergonomic research to evaluate physiologicalactivity levels in PFC.

Place, publisher, year, edition, pages
Cham: , 2019 Edition: 827
Series
Advances in Intelligent Systems and Computing, ISSN 21945357, E-ISSN 2194-5365 ; 827
Keywords
Visual ergonomics, neuroergonomics, Nirs, robotics
National Category
Other Medical Sciences
Identifiers
urn:nbn:se:hig:diva-27848 (URN)10.1007/978-3-319-96059-3_22 (DOI)2-s2.0-85051781837 (Scopus ID)978-3-319-96058-6 (ISBN)978-3-319-96059-3 (ISBN)
Conference
20th Congress of the International Ergonomics Association, IEA 2018, 26-30 August 2018, Florence, Italy
Funder
Forte, Swedish Research Council for Health, Working Life and Welfare, 2009-1761
Note

Södra Skogsägarnas Stiftelse för Forskning, Utveckling och Utbildning Grant no: 2009-1761

Available from: 2018-09-05 Created: 2018-09-05 Last updated: 2018-12-05Bibliographically approved
Domkin, D., Forsman, M. & Richter, H. O. (2019). Effect of ciliary-muscle contraction force on trapezius muscle activity during computer mouse work. European Journal of Applied Physiology, 119(2), 389-397
Open this publication in new window or tab >>Effect of ciliary-muscle contraction force on trapezius muscle activity during computer mouse work
2019 (English)In: European Journal of Applied Physiology, ISSN 1439-6319, E-ISSN 1439-6327, Vol. 119, no 2, p. 389-397Article in journal (Refereed) Published
Abstract [en]

The present study aimed to identify whether or not an increase in ciliary-muscle contraction force, when the eye-lens is adjusted for viewing at a near distance, result in an increase in trapezius muscle activity, while performing a natural work task. Twelve participants, ranging in age from 21 to 32 years, performed a computer-mouse work task during free gaze conditions. A moving visual target was tracked with a computer mouse on a screen placed at two different distances from the eyes, 25 cm and 50 cm. Tracking performance, eye accommodation, and bilateral trapezius muscle activity were measured continuously. Ciliary-muscle contraction force was computed according to a formula which takes into account the age-dependent, non-linear relationship between contraction force of the ciliary muscle and the produced level of eye accommodation. Generalized Estimating Equations analyses were performed. On the dominant hand side and for the nearest screen distance, there was a significant effect of ciliary-muscle contraction force on the trapezius muscle activity (p<0.001). No other effects were significant (p>0.05). The results support the hypothesis that high visual demands, during computer mouse work, increase ciliary muscle contraction force and contribute to a raise of the sustained level of trapezius muscle activity. The current study specifically clarifies the validity of the relationship between ciliary-muscle contraction force and trapezius muscle activity and demonstrates that this relationship is not due to a general personal trait. We conclude that a high level of ciliary muscle contraction force can contribute to a development of musculoskeletal complaints in the neck-shoulder area.

Keywords
Ciliary-muscle contraction force; Computer mouse work; Electromyography; Eye-accommodation; Trapezius muscle; Visual ergonomics
National Category
Occupational Health and Environmental Health
Identifiers
urn:nbn:se:hig:diva-26194 (URN)10.1007/s00421-018-4031-8 (DOI)000457735500006 ()30430279 (PubMedID)2-s2.0-85056460114 (Scopus ID)
Funder
Forte, Swedish Research Council for Health, Working Life and Welfare, 2009-1761
Available from: 2018-03-01 Created: 2018-03-01 Last updated: 2019-08-09Bibliographically approved
Richter, H., Domkin, D., Elcadi, G. H., Anderson, H. W., Högberg, H. & Englund, M. (2018). A comparison of mental and visual loads resulting from semi-automated and conventional forest harvesting: An experimental machine simulation study. In: : . Paper presented at IEA 2018 - 20th Congress International Ergonomics Association - Florence, 26th - 30th August 2018, Florence, Italy.
Open this publication in new window or tab >>A comparison of mental and visual loads resulting from semi-automated and conventional forest harvesting: An experimental machine simulation study
Show others...
2018 (English)Conference paper, Oral presentation only (Other academic)
Abstract [en]

This study is concerned with a new method for partly automating forestry harvesting work. Work-related injuries and constant demands for a higher productivity are two of the many arguments for why forestry work must be improved. Forestry work places great mental demands on the driver because they must continuously evaluate and act on relevant parts in a heavy visual information flow. Against this background the purpose of the present study was to extend the knowledge of functional linkages between visual and mental fatigue, performance, and prefrontal cortex activity, during semi-automated and conventional forestry harvesting work. Eleven healthy participants, range 21–51 years old, with a minimum of 1-year work experience, carried out the task of loading logs along a standardized path in a machine simulator during two counterbalanced 45-min periods: (i) conventional forest harvesting, and; (ii) semi-automated forest harvesting. Equal emphasizes was put on accuracy and speed. During manual forest harvesting the driver controlled the crane arm, used to load logs into the load space of the forest vehicle (“forwarder”), by manually operating the joysticks and so guide the crane to the location of the log and then back to the load space. During semi-automatic forest harvesting the driver moved the crane with the press of a button to a pre-programmed location near the log and then, after another button press, to a pre-programmed location within the load space. The following joystick usage parameters were considered for the statistical analysis: Sequential work cycle number, work phase (1-loading in basket, 2-movement to log, 3-picking up log, 4-movement to load space), number of simultaneously used controls across samples of one phase, number of direction changes of joystick movements per phase. Mental load was assessed by quantification of oxygenated hemoglobin (HbO2) concentration changes over the right dorsolateral prefrontal cortex (dlPFC) via non-invasive functional near infrared spectrometry (fFNIRS: PortaLite mini, Artinis Medical Systems, Zetten, the Netherlands). The frequency and duration of horizontal amplitudes of eye/head/neck angles was assessed continuously with 8 SmartEye cameras and used as a measure of visual load. NASA-TLX and Borg CRS was used to assess perceived mental and physical fatigue. Linear Mixed Model will be used to test and to analyze the effect of the duration of work, joystick usage, work type (manual or semi-automated) and perceived mental and physical effort on the outcome of oxygenated hemoglobin concentration. This study contributes with new knowledge of the consequences of the current increase in automation. The 4th industrial revolution can have tremendous implications on how we perceive and organize work in the future, but little is still known about the impact on human body and brain.

National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:hig:diva-25769 (URN)
Conference
IEA 2018 - 20th Congress International Ergonomics Association - Florence, 26th - 30th August 2018, Florence, Italy
Projects
Skogsmaskinförares mentala och fysiska belastningsnivåer under arbete med delautomatiserad skotarkran – en experimentell studie i skogsmaskinsimulator (MentAuto)
Note

Abstract submitted to: IEA 2018 - 20th Congress International Ergonomics Association - Florence, 26th - 30th August 2018

Available from: 2017-12-08 Created: 2017-12-08 Last updated: 2018-03-22Bibliographically approved
Richter, H., Domkin, D., Elcadi, G. H., Andersson, H., Högberg, H., Forsman, M. & Englund, M. (2018). A comparsion of mental and visual loads resulting from semi-automated and conventional forest harvesting: An experimental machine simulation study. In: Per Lindberg (Ed.), FALF Konferens 2018: Arbetet - problem eller potential för en hållbar livsmiljö?: Program och Abstracts. Paper presented at FALF KONFERENS 2018 'Arbetet - problem eller potential för en hållbar livsmiljö?',10-12 juni 2018, Gävle (pp. 96). Gävle: Gävle Universtiy Press
Open this publication in new window or tab >>A comparsion of mental and visual loads resulting from semi-automated and conventional forest harvesting: An experimental machine simulation study
Show others...
2018 (English)In: FALF Konferens 2018: Arbetet - problem eller potential för en hållbar livsmiljö?: Program och Abstracts / [ed] Per Lindberg, Gävle: Gävle Universtiy Press , 2018, p. 96-Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

This study is concerned with a new method for partly automating forestry harvesting work. Work-related injuries and constant demands for a higher productivity are two of the many arguments for why forestry work must be improved. Forestry work places great mental demands on the driver because they must continuously evaluate and act on relevant parts in a heavy visual information flow. Against this background the purpose of the present study was to extend the knowledge of functional linkages between visual and mental fatigue, performance, and prefrontal cortex activity, during semi-automated and conventional forestry harvesting work. Eleven healthy participants, range 21–51 years old, with a minimum of 1-year work experience, carried out the task of loading logs along a standardized path in a machine simulator during two counterbalanced 45-min periods: (i) conventional forest harvesting, and; (ii) semi-automated forest harvesting. Equal emphasizes was put on accuracy and speed. During manual forest harvesting the driver controlled the crane arm, used to load logs into the load space of the forest vehicle (“forwarder”), by manually operating the joysticks and so guide the crane to the location of the log and then back to the load space. During semi-automatic forest harvesting the driver moved the crane with the press of a button to a pre-programmed location near the log and then, after another button press, to a pre-programmed location within the load space. The following joystick usage parameters were considered for the statistical analysis: Sequential work cycle number, work phase (1-loading in basket, 2-movement to log, 3-picking up log, 4-movement to load space), number of simultaneously used controls across samples of one phase, number of direction changes of joystick movements per phase. Mental load was assessed by quantification of oxygenated hemoglobin (HbO2) concentration changes over the right dorsolateral prefrontal cortex (dlPFC) via non-invasive functional near infrared spectrometry (fFNIRS: PortaLite mini, Artinis Medical Systems, Zetten, the Netherlands). The frequency and duration of horizontal amplitudes of eye/head/neck angles was assessed continuously with 8 SmartEye cameras and used as a measure of visual load. NASA-TLX and Borg CRS was used to assess perceived mental and physical fatigue. Linear Mixed Model will be used to test and to analyze the effect of the duration of work, joystick usage, work type (manual or semi-automated) and perceived mental and physical effort on the outcome of oxygenated hemoglobin concentration. This study contributes with new knowledge of the consequences of the current increase in automation. The 4th industrial revolution can have tremendous implications on how we perceive and organize work in the future, but little is still known about the impact on human body and brain.

Place, publisher, year, edition, pages
Gävle: Gävle Universtiy Press, 2018
National Category
Medical and Health Sciences Health Sciences
Identifiers
urn:nbn:se:hig:diva-27224 (URN)978-91-88145-28-4 (ISBN)
Conference
FALF KONFERENS 2018 'Arbetet - problem eller potential för en hållbar livsmiljö?',10-12 juni 2018, Gävle
Projects
MentAuto
Available from: 2018-06-20 Created: 2018-06-20 Last updated: 2018-12-06Bibliographically approved
Domkin, D., Forsman, M. & Richter, H. (2016). Ciliary muscle contraction force and trapezius muscle activity during manual tracking of a moving visual target. Journal of Electromyography & Kinesiology, 28, 193-198
Open this publication in new window or tab >>Ciliary muscle contraction force and trapezius muscle activity during manual tracking of a moving visual target
2016 (English)In: Journal of Electromyography & Kinesiology, ISSN 1050-6411, E-ISSN 1873-5711, Vol. 28, p. 193-198Article in journal (Refereed) Published
Abstract [en]

Previous studies have shown an association of visual demands during near work and increased activity of the trapezius muscle. Those studies were conducted under stationary postural conditions with fixed gaze and artificial visual load. The present study investigated the relationship between ciliary muscle contraction force and trapezius muscle activity across individuals during performance of a natural dynamic motor task under free gaze conditions. Participants (N = 11) tracked a moving visual target with a digital pen on a computer screen. Tracking performance, eye refraction and trapezius muscle activity were continuously measured. Ciliary muscle contraction force was computed from eye accommodative response. There was a significant Pearson correlation between ciliary muscle contraction force and trapezius muscle activity on the tracking side (0.78, p < 0.01) and passive side (0.64, p < 0.05). The study supports the hypothesis that high visual demands, leading to an increased ciliary muscle contraction during continuous eye–hand coordination, may increase trapezius muscle tension and thus contribute to the development of musculoskeletal complaints in the neck–shoulder area. Further experimental studies are required to clarify whether the relationship is valid within each individual or may represent a general personal trait, when individuals with higher eye accommodative response tend to have higher trapezius muscle activity.

Keywords
Ciliary muscle, Trapezius muscle, Near work
National Category
Occupational Health and Environmental Health
Identifiers
urn:nbn:se:hig:diva-20299 (URN)10.1016/j.jelekin.2015.11.008 (DOI)000375923000025 ()26746010 (PubMedID)2-s2.0-84960859983 (Scopus ID)
Funder
Forte, Swedish Research Council for Health, Working Life and Welfare, 2005-0488Forte, Swedish Research Council for Health, Working Life and Welfare, 2009-1761
Available from: 2015-09-18 Created: 2015-09-18 Last updated: 2018-12-03Bibliographically approved
Domkin, D., Richter, H., Zetterlund, C. & Lundqvist, L.-O. (2016). Effect of reduced visual acuity on precision of two-dimensional tracing movements. Journal of Optometry, 9(2), 93-101
Open this publication in new window or tab >>Effect of reduced visual acuity on precision of two-dimensional tracing movements
2016 (English)In: Journal of Optometry, ISSN 1888-4296, Vol. 9, no 2, p. 93-101Article in journal (Refereed) Published
Abstract [en]

Purpose

We intended to assess consequences of reduced visual acuity for performance in a natural simple motor task (tracing) using objective kinematic performance measures. Specifically, we intended to elucidate the kind of relationship between the task performance and best corrected binocular visual acuity and to determine the threshold of visual acuity when task performance starts to deteriorate.

Methods

Ninety-five individuals with different best corrected visual acuity participated in the study (age 49 ± 12 years, mean ± SD, 27 men and 68 women). The participants manually traced maze-like visual patterns of different spatial complexity presented on the screen of a portable notebook computer using Clinical Kinematic Assessment Tool software. Tracing error was computed as performance measure in each trial with a spatial pattern matching technique – rigid point set registration method.

Results

The segmented linear regression analysis showed that the relation between visual acuity and tracing errors was best described with a regression function having a break point between two data segments. Tracing performance was unaffected by values of visual acuity below 0.2 on logMAR scale, but when logMAR values increased above this critical limit (i.e. when visual acuity is further reduced), tracing errors linearly increased. The rate of the increase of the tracing error correlated with the complexity of visual stimulus shape.

Conclusion

Testing of fine motor functions with objective kinematic measures during visuomotor tasks may help differentiating between actual effects of reduced visual acuity on eye–hand coordination in individuals with similar levels of impairment of visual acuity.

Keywords
eye-hand coordination, tracing, visual acuity, low vision
National Category
Other Medical Sciences not elsewhere specified
Identifiers
urn:nbn:se:hig:diva-17478 (URN)10.1016/j.optom.2015.03.003 (DOI)2-s2.0-84929603184 (Scopus ID)
Available from: 2014-09-09 Created: 2014-09-09 Last updated: 2018-12-03Bibliographically approved
Richter, H., Crenshaw, A. G., Domkin, D. & Elcadi, G. H. (2016). Near infrared spectroscopy as a useful research tool to measure prefrontal cortex activity during visually demanding near work. IIE Transactions on Occupational Ergonomics and Human Factors, 4(2-3), 164-174
Open this publication in new window or tab >>Near infrared spectroscopy as a useful research tool to measure prefrontal cortex activity during visually demanding near work
2016 (English)In: IIE Transactions on Occupational Ergonomics and Human Factors, ISSN 2157-7323, Vol. 4, no 2-3, p. 164-174Article in journal (Refereed) Published
Abstract [en]

Background: Unlike the usual skeletal muscles, ciliary muscles responsible for focusing the crystalline eye lens and extraocular muscles responsible for convergence eye movements appear resistant to fatigue. Purpose: The dual goals of this article are to briefly outline the current evidence that suggests that probing into blood flow and hemodynamic prefrontal brain activity with Near-Infrared Spectroscopy (fNIRS) could advance progress in visual ergonomic research, and to provide pilot data exemplifying the proposed approach. Methods: The vision task consisted of sustained focusing on a contrast-varying black and white Gabor grating. Four participants with a median age of 46 (IQR 44 – 50) fixated the grating from a distance of 65 cm. Three counterbalanced 10-min tasks required central fixation and accommodation/convergence on the grating target through: (i) 0.0 diopter (D) lenses, (ii) −1.5 D lenses, and (iii) −3.5yD lenses while maintaining maximal focus. Non-invasive measurements of local oxyhemoglobin (HbO2) were quantified with a one-channel Near Infrared Spectrometer, NIRS. The NIRS probe was placed on the prefrontal cortex in the vicinity of the right dorsolateral prefrontal cortex or Brodmann area 46 (DLPFC, BA 46). Accommodation response and contrast threshold was measured in parallel. Results: General estimating equation analyses showed that baseline subtracted DLPFC blood flow (ΔHbO2) increased significantly over time in all three lens conditions. The effect of time may be caused by a continuous increase in mental effort to compensate for progressively more mental fatigue induced by increased visual attention. The increase of DLPFC ΔHbO2 was also larger in magnitude in participants with larger amplitudes accommodation response (i.e., in participants who minimized deterioration in visual performance). Conclusion: The results from this study indicate that oxyhemoglobin changes recorded over DLPFC with NIRS can be used to assay the degree to which the visual system is strained during demanding near work.

Keywords
Attention fatigue, Accommodation, Compensatory effort, Discomfort, Electromyography, Mental fatigue, Near-Infrared Spectroscopy, Neck pain, Productivity, Visual ergonomics
National Category
Health Sciences
Identifiers
urn:nbn:se:hig:diva-18657 (URN)10.1080/21577323.2015.1067258 (DOI)000442406000008 ()
Funder
Forte, Swedish Research Council for Health, Working Life and Welfare, 2009-1761
Note

Accepted author version posted online.

Available from: 2015-01-01 Created: 2015-01-01 Last updated: 2019-03-26Bibliographically approved
Richter, H., Domkin, D. & Forsman, M. (2014). Ciliary muscle contraction force and trapezius muscle activity during manual tracking of visual targets. In: The Association for Research in Vision and Ophthalmology Annual Meeting: ARVO 2014. Paper presented at ARVO 2014 Annual Meeting, Orlando, Florida, May 4–8, 2014 (pp. 263).
Open this publication in new window or tab >>Ciliary muscle contraction force and trapezius muscle activity during manual tracking of visual targets
2014 (English)In: The Association for Research in Vision and Ophthalmology Annual Meeting: ARVO 2014, 2014, p. 263-Conference paper, Poster (with or without abstract) (Refereed)
National Category
Other Medical Sciences not elsewhere specified
Identifiers
urn:nbn:se:hig:diva-16630 (URN)
Conference
ARVO 2014 Annual Meeting, Orlando, Florida, May 4–8, 2014
Projects
EKAT
Funder
Forte, Swedish Research Council for Health, Working Life and Welfare
Available from: 2014-05-08 Created: 2014-05-08 Last updated: 2018-03-13Bibliographically approved
Domkin, D., Forsman, M. & Richter, H. (2014). Relationship between eye-lens accomodative response and trapezius muscle activity during manual tracking of a visual target. In: 11th International Symposium on Human Factors in Organisational Design and Management (ODAM 2014)and 46th Annual Nordic Ergonomics Society: . Paper presented at 11th International Symposium on Human Factors in Organisational Design and Management (ODAM) & 46th Annual Nordic Ergonomics Society Conference (NES), 17th-20th August 2014, Copenhagen, Denmark (pp. 1073-1074). Technical University of Denmark
Open this publication in new window or tab >>Relationship between eye-lens accomodative response and trapezius muscle activity during manual tracking of a visual target
2014 (English)In: 11th International Symposium on Human Factors in Organisational Design and Management (ODAM 2014)and 46th Annual Nordic Ergonomics Society, Technical University of Denmark , 2014, p. 1073-1074Conference paper, Oral presentation with published abstract (Refereed)
Place, publisher, year, edition, pages
Technical University of Denmark, 2014
Keywords
Computer work, neck pain, eye accommodation, trapezius muscle
National Category
Occupational Health and Environmental Health
Identifiers
urn:nbn:se:hig:diva-17437 (URN)10.4122/dtu:2612 (DOI)
Conference
11th International Symposium on Human Factors in Organisational Design and Management (ODAM) & 46th Annual Nordic Ergonomics Society Conference (NES), 17th-20th August 2014, Copenhagen, Denmark
Available from: 2014-08-29 Created: 2014-08-29 Last updated: 2018-03-13Bibliographically approved
Domkin, D., Sörqvist, P. & Richter, H. (2013). Distraction of Eye-Hand Coordination varies with Working Memory Capacity. Journal of motor behavior, 45(1), 79-83
Open this publication in new window or tab >>Distraction of Eye-Hand Coordination varies with Working Memory Capacity
2013 (English)In: Journal of motor behavior, ISSN 0022-2895, E-ISSN 1940-1027, Vol. 45, no 1, p. 79-83Article in journal (Refereed) Published
Abstract [en]

The authors present a study of the relationship between individual variation in working memory capacity (WMC) and visually guided hand control in the face of visual distraction. WMC was assessed with the automated operation span task. Hand control was measured by requesting participants to track a visual target with a hand-held touch screen pen. Tracking error increased when nontarget visual objects (distractors) appeared, especially in individuals with low WMC. High-WMC individuals are less impaired by distractors than their low-WMC counterpart, because they resume target tracking more quickly after distractor onset. The results suggest that visual distractors cause a momentary interruption to tracking movements and that high WMC attenuates this interruption by facilitating visual search.

National Category
Psychology
Identifiers
urn:nbn:se:hig:diva-13311 (URN)10.1080/00222895.2012.746282 (DOI)000322304400010 ()23406167 (PubMedID)2-s2.0-84874498399 (Scopus ID)
Available from: 2012-10-28 Created: 2012-10-28 Last updated: 2018-12-03Bibliographically approved
Organisations

Search in DiVA

Show all publications