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Cheng Y, Lin L, Huang P, Zhang J, Wang Y, Pan X. Hypotension with neurovascular changes and cognitive dysfunction: An epidemiological, pathobiological, and treatment review. Chin Med J (Engl) 2024:00029330-990000000-01080. [PMID: 38785189 DOI: 10.1097/cm9.0000000000003103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Indexed: 05/25/2024] Open
Abstract
ABSTRACT Hypotension is a leading cause of age-related cognitive impairment. The available literature evidences that vascular factors are associated with dementia and that hypotension alters cerebral perfusion flow and can aggravate the neurodegeneration of Alzheimer's disease (AD). Despite the discovery of biomarkers and the recent progress made in neurovascular biology, epidemiology, and brain imaging, some key issues remain largely unresolved: the potential mechanisms underlying the neural deterioration observed in AD, the effect of cerebrovascular alterations on cognitive deficits, and the positive effects of hypotension treatment on cognition. Therefore, further well-designed studies are needed to unravel the potential association between hypotension and cognitive dysfunction and reveal the potential benefits of hypotension treatment for AD patients. Here, we review the current epidemiological, pathobiological, and treatment-related literature on neurovascular changes and hypotension-related cognitive dysfunction and highlight the unsettled but imminent issues that warrant future research endeavors.
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Affiliation(s)
- Yingzhe Cheng
- Department of Neurology, Center for Cognitive Neurology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China
- Fujian Institute of Geriatrics, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China
- Institute of Clinical Neurology, Fujian Medical University, Fuzhou, Fujian 350001, China
- Fujian Key Laboratory of Molecular Neurology, Fujian Medical University, Fuzhou, Fujian 350001, China
| | - Lin Lin
- Department of Neurology, Center for Cognitive Neurology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China
- Fujian Institute of Geriatrics, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China
- Institute of Clinical Neurology, Fujian Medical University, Fuzhou, Fujian 350001, China
- Fujian Key Laboratory of Molecular Neurology, Fujian Medical University, Fuzhou, Fujian 350001, China
| | - Peilin Huang
- Department of Neurology, Center for Cognitive Neurology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China
- Fujian Institute of Geriatrics, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China
- Institute of Clinical Neurology, Fujian Medical University, Fuzhou, Fujian 350001, China
- Fujian Key Laboratory of Molecular Neurology, Fujian Medical University, Fuzhou, Fujian 350001, China
| | - Jiejun Zhang
- Department of Neurology, Center for Cognitive Neurology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China
- Fujian Institute of Geriatrics, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China
- Institute of Clinical Neurology, Fujian Medical University, Fuzhou, Fujian 350001, China
- Fujian Key Laboratory of Molecular Neurology, Fujian Medical University, Fuzhou, Fujian 350001, China
- Center for Geriatrics, Hainan General Hospital, Haikou, Hainan 570311, China
| | - Yanping Wang
- Department of Endocrinology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China
| | - Xiaodong Pan
- Department of Neurology, Center for Cognitive Neurology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China
- Fujian Institute of Geriatrics, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, China
- Institute of Clinical Neurology, Fujian Medical University, Fuzhou, Fujian 350001, China
- Fujian Key Laboratory of Molecular Neurology, Fujian Medical University, Fuzhou, Fujian 350001, China
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Polyakova AV, Pushkin MS, Kutkova AK, Voznyuk IA. [Functional transcranial dopplerography is a diagnostic tool for cognitive impairment syndrome]. Zh Nevrol Psikhiatr Im S S Korsakova 2024; 124:7-12. [PMID: 38465805 DOI: 10.17116/jnevro20241240217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
Functional transcranial dopplerography (FTCD) is a non-invasive ultrasound examination that allows recording the dynamics of cerebral blood flow parameters under conditions of factors stimulated the activity of the structures of the central nervous system. Judgments about the sensitivity and specificity of FTCD are based on the close connection between changes in the activity of the nervous (somatic) system and the response of regional cerebral blood flow (CBF). The technique is a portable and accessible diagnostic method used in assessing the possibility of expanding functional activity during the recovery period after a stroke. An increase in mental activity in response to the presentation of a cognitive task, accompanied by an increase in glucose and oxygen consumption and naturally requiring an increase in cerebral perfusion parameters, can also be assessed by changes in regional blood flow parameters while maintaining the reactive mechanisms of autoregulation. A search of literature sources was carried out in the electronic databases PubMed and Scopus. For the subject search, Medical Subject Headings were used. A total of 36 sources that mentioned the terms «cognitive function» and «functional transcranial Doppler» were selected for preliminary analysis. At the present stage, methodological problems are obvious, requiring the development and implementation of a standard package of targeted functional tests to assess cognitive status. Available equipment and software require technological solutions to ensure objective recording of changes in cerebral blood flow during testing and training.
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Affiliation(s)
- A V Polyakova
- Dzhanelidze Saint Petersburg institute of emergency care, St. Petersburg, Russia
| | - M S Pushkin
- Dzhanelidze Saint Petersburg institute of emergency care, St. Petersburg, Russia
| | - A K Kutkova
- Dzhanelidze Saint Petersburg institute of emergency care, St. Petersburg, Russia
| | - I A Voznyuk
- Pavlov First St. Petersburg State Medical University, St. Petersburg, Russia
- Immanuel Kant Baltic Federal University, Kaliningrad, Russia
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Chen S, Chen H, Duan J, Cui L, Liu R, Xing Y. Impaired Dynamic Cerebral Autoregulation in Patients With Cerebral Venous Sinus Thrombosis: Evaluation Using Transcranial Doppler and Silent Reading Stimulation. ULTRASOUND IN MEDICINE & BIOLOGY 2023; 49:2221-2226. [PMID: 37532632 DOI: 10.1016/j.ultrasmedbio.2023.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 06/21/2023] [Accepted: 07/11/2023] [Indexed: 08/04/2023]
Abstract
OBJECTIVE Cerebral venous sinus thrombosis (CVST) may impair dynamic cerebral autoregulation (dCA) of the middle cerebral artery (MCA). However, most studies have focused on dCA of the MCA; a few studies are based on the posterior cerebral artery (PCA) during silent reading and neurovascular coupling (NVC). This study explored the effects of CVST on dCA of the MCA and PCA during silent reading and NVC. METHODS From January 2021 to August 2022, 60 CVST patients and 30 controls were enrolled in this study. Non-invasive continuous beat-to-beat blood pressure, cerebral blood flow velocity and other associated information on the MCA and PCA during silent reading were collected using a transcranial Doppler. NVC assessment was performed by opening and closing the eyes periodically based on voice prompts, and eye-opening visual stimulation was achieved by silently reading Chinese tourism materials. Visual stimulation signals can selectively activate Brodmann's areas 17, 18, and 19 of the occipital when reading silently with open eyes, prompting them to release neurotransmitters and dilate PCA. dCA was determined by transfer function analysis. RESULTS In dCA of the PCA during silent reading, the CVST group's very low frequency phase was lower than that of the control group (p = 0.047). In NVC, the difference in the indexes of the cerebrovascular conductance and visually evoked flow response of the CVST group were lower than those of the control group (p = 0.017 and p = 0.019, respectively). CONCLUSION Compared with the control group, dCA and NVC of the PCA during silent reading were impaired in CVST patients.
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Affiliation(s)
- Songwei Chen
- Department of Vascular Ultrasonography, Xuanwu Hospital, Capital Medical University, Beijing, China; Beijing Diagnostic Center of Vascular Ultrasound, Beijing, China; Center of Vascular Ultrasonography, Beijing Institute of Brain Disorders, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China
| | - Hongxiu Chen
- Department of Vascular Ultrasonography, Xuanwu Hospital, Capital Medical University, Beijing, China; Beijing Diagnostic Center of Vascular Ultrasound, Beijing, China; Center of Vascular Ultrasonography, Beijing Institute of Brain Disorders, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China
| | - Jiangang Duan
- Department of Emergency, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Liuping Cui
- Department of Vascular Ultrasonography, Xuanwu Hospital, Capital Medical University, Beijing, China; Beijing Diagnostic Center of Vascular Ultrasound, Beijing, China; Center of Vascular Ultrasonography, Beijing Institute of Brain Disorders, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China
| | - Ran Liu
- Department of Vascular Ultrasonography, Xuanwu Hospital, Capital Medical University, Beijing, China; Beijing Diagnostic Center of Vascular Ultrasound, Beijing, China; Center of Vascular Ultrasonography, Beijing Institute of Brain Disorders, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China
| | - Yingqi Xing
- Department of Vascular Ultrasonography, Xuanwu Hospital, Capital Medical University, Beijing, China; Beijing Diagnostic Center of Vascular Ultrasound, Beijing, China; Center of Vascular Ultrasonography, Beijing Institute of Brain Disorders, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China.
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Reyes Del Paso GA, Montoro CI, Jennings JR, Duschek S. Experimental carotid baroreceptor stimulation reduces blood flow velocities in the anterior and middle cerebral arteries of healthy individuals. J Physiol Sci 2023; 73:13. [PMID: 37312034 DOI: 10.1186/s12576-023-00871-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 06/07/2023] [Indexed: 06/15/2023]
Abstract
This study investigated effects of experimental baroreceptor stimulation on bilateral blood flow velocities in the anterior and middle cerebral arteries (ACA and MCA) using functional transcranial Doppler sonography. Carotid baroreceptors were stimulated by neck suction in 33 healthy participants. Therefore, negative pressure (- 50 mmHg) was applied; neck pressure (+ 10 mmHg) was used as a control condition. Heart rate (HR) and blood pressure (BP) were also continuously recorded. Neck suction led to reductions in bilateral ACA and MCA blood flow velocities, which accompanied the expected HR and BP decreases; HR and BP decreases correlated positively with the ACA flow velocity decline. The observations suggest reduction of blood flow in the perfusion territories of the ACA and MCA during baroreceptor stimulation. Baroreceptor-related HR and BP decreases may contribute to the cerebral blood flow decline. The findings underline the interaction between peripheral and cerebral hemodynamic regulation in autoregulatory control of cerebral perfusion.
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Affiliation(s)
| | | | - J Richard Jennings
- Department of Psychiatry, School of Medicine, University of Pittsburgh, Pittsburgh, USA
| | - Stefan Duschek
- UMIT TIROL - University for Health Sciences and Technology, Hall in Tirol, Austria
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Intharakham K, Panerai RB, Robinson TG. The scalability of common paradigms for assessment of cognitive function: A functional transcranial Doppler study. PLoS One 2022; 17:e0266048. [PMID: 35344567 PMCID: PMC8959162 DOI: 10.1371/journal.pone.0266048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 03/12/2022] [Indexed: 11/18/2022] Open
Abstract
Cognitive paradigms induce changes in cerebral blood flow (CBF) associated with increased metabolic demand, namely neurovascular coupling (NVC). We tested the hypothesis that the effect of complexity and duration of cognitive paradigms will either enhance or inhibit the NVC response. Bilateral CBF velocity (CBFV) in the middle cerebral arteries (MCAs) via transcranial Doppler ultrasound (TCD), blood pressure (BP), electrocardiogram (ECG) and end-tidal CO2 (EtCO2) of 16 healthy participants (aged 21–71 years) were simultaneously recorded at rest and during randomized paradigms of different complexities (naming words beginning with P-,R-,V- words and serial subtractions of 100–2,100–7,1000–17), and durations (5s, 30s and 60s). CBFV responses were population mean normalized from a 30-s baseline period prior to task initiation. A significant increase in bilateral CBFV response was observed at the start of all paradigms and provided a similar pattern in most responses, irrespective of complexity or duration. Although significant inter-hemispherical differences were found during performance of R-word and all serial subtraction paradigms, no lateralisation was observed in more complex naming word tasks. Also, the effect of duration was manifested at late stages of 100–7, but not for other paradigms. CBFV responses could not distinguish different levels of complexity or duration with a single presentation of the cognitive paradigm. Further studies of the ordinal scalability of the NVC response are needed with more advanced modelling techniques, or different types of neural stimulation.
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Affiliation(s)
- Kannakorn Intharakham
- Department of Cardiovascular Sciences, University of Leicester, Leicester, United Kingdom
- * E-mail:
| | - Ronney B. Panerai
- Department of Cardiovascular Sciences, University of Leicester, Leicester, United Kingdom
- NIHR Leicester Biomedical Research Centre, British Heart Foundation Cardiovascular Research Centre, Glenfield Hospital, Leicester, United Kingdom
| | - Thompson G. Robinson
- Department of Cardiovascular Sciences, University of Leicester, Leicester, United Kingdom
- NIHR Leicester Biomedical Research Centre, British Heart Foundation Cardiovascular Research Centre, Glenfield Hospital, Leicester, United Kingdom
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Egger ST, Bobes J, Seifritz E, Vetter S, Schuepbach D. Functional transcranial Doppler: Selection of methods for statistical analysis and representation of changes in flow velocity. Health Sci Rep 2021; 4:e400. [PMID: 34632099 PMCID: PMC8493565 DOI: 10.1002/hsr2.400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 08/10/2021] [Accepted: 09/01/2021] [Indexed: 11/09/2022] Open
Abstract
INTRODUCTION Transcranial Doppler (TCD) is a method used to study cerebral hemodynamics. In the majority of TCD studies, regression analysis and analysis of variance are the most frequently applied statistical methods. However, due to the dynamic and interdependent nature of flow velocity, nonparametric tests may allow for better statistical analysis and representation of results. METHOD The sample comprised 30 healthy participants, aged 33.87 ± 7.48 years; with 33% (n = 10) females. During a visuo-motor task, the mean flow velocity (MFV) in the middle cerebral artery (MCA) was measured using TCD. The MFV was converted to values relative to the resting state. The results obtained were analyzed using the general linear model (GLM) and the general additional model (GAM). The fit indices of both analysis methods were compared with each other. RESULTS Both MCAs showed a steady increase in MFV during the visuo-motor task, smoothly returning to resting state values. During the first 20 seconds of the visuo-motor task, the MFV increased by a factor of 1.06 ± 0.07 in the right-MCA and by a factor of 1.08 ± 0.07 in the left-MCA. GLM and GAM showed a statistically significant change in MFV (GLM:F(2, 3598) = 16.76, P < .001; GAM:F(2, 3598) = 21.63, P < .001); together with effects of hemispheric side and gender (GLM:F(4, 3596) = 7.83, P < .005; GAM:F(4, 3596) = 2.13, P = .001). Comparing the models using the χ2 test for goodness of fit yields a significant difference χ2 (9.9556) = 0.6836, P < .001. CONCLUSIONS Both the GLM and GAM yielded valid statistical models of MFV in the MCA in healthy subjects. However, the model using the GAM resulted in improved fit indices. The GAM's advantage becomes even clearer when the MFV curves are visualized; yielding a more realistic approach to brain hemodynamics, thus allowing for an improvement in the interpretation of the mathematical and statistical results. Our results demonstrate the utility of the GAM for the analysis and representation of hemodynamic parameters.
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Affiliation(s)
- Stephan T. Egger
- Department of Psychiatry, Psychotherapy and PsychosomaticsUniversity of Zürich, Faculty of Medicine, Psychiatric University Hospital of ZurichZurichSwitzerland
- Department of Psychiatry, ISPA, INEUROPA, CIBERSAMUniversity of Oviedo, Faculty of MedicineOviedoSpain
| | - Julio Bobes
- Department of Psychiatry, ISPA, INEUROPA, CIBERSAMUniversity of Oviedo, Faculty of MedicineOviedoSpain
| | - Erich Seifritz
- Department of Psychiatry, Psychotherapy and PsychosomaticsUniversity of Zürich, Faculty of Medicine, Psychiatric University Hospital of ZurichZurichSwitzerland
| | - Stefan Vetter
- Department of Psychiatry, Psychotherapy and PsychosomaticsUniversity of Zürich, Faculty of Medicine, Psychiatric University Hospital of ZurichZurichSwitzerland
| | - Daniel Schuepbach
- Department of General Psychiatry, Center of Psychosocial Medicine, University of HeidelbergUniversity of HeidelbergHeidelbergGermany
- Departmet of Psychiatry and PsychotherapyKlinikum am WeissenhofWeinsbergGermany
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Tari B, Shirzad M, Badcock NA, Belfry GR, Heath M. 'Delaying' a saccade: Preparatory phase cortical hemodynamics evince the neural cost of response inhibition. Brain Cogn 2021; 154:105808. [PMID: 34634572 DOI: 10.1016/j.bandc.2021.105808] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 08/12/2021] [Accepted: 09/26/2021] [Indexed: 11/30/2022]
Abstract
Minimally delayed (MD) saccades require inhibition of a prepotent response until a target is extinguished, and unlike the more extensively studied antisaccade task, do not require the additional cognitive component of vector inversion (i.e., 180° target spatial transposition). Here, participants completed separate blocks of MD and prepotent stimulus-driven saccades (i.e., respond at target onset) while cortical hemodynamics were measured via functional transcranial Doppler ultrasound. MD saccades produced longer and more variable reaction times (RT). In turn, MD and stimulus-driven saccade preparatory phase cortical hemodynamics increased and decreased, respectively, relative to baseline and the two conditions differed from one another throughout the preparatory phase. The longer RTs and increased cortical hemodynamics of MD saccades is taken to evince response complexity and the increased neural activity to accommodate response inhibition. To our knowledge, such findings provide the first work to examine the neural foundations of MD saccades.
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Affiliation(s)
- Benjamin Tari
- School of Kinesiology, Faculty of Health Sciences, University of Western Ontario, 1151 Richmond St, London, ON N6A 3K7, Canada
| | - Mustafa Shirzad
- School of Kinesiology, Faculty of Health Sciences, University of Western Ontario, 1151 Richmond St, London, ON N6A 3K7, Canada
| | - Nicholas A Badcock
- School of Psychological Science, University of Western Australia, 35 Stirling Hwy, Crawley, WA 6009, Australia
| | - Glen R Belfry
- School of Kinesiology, Faculty of Health Sciences, University of Western Ontario, 1151 Richmond St, London, ON N6A 3K7, Canada; Canadian Centre for Activity and Aging, University of Western Ontario, 1201 Western Rd, London, ON N6G 1H1, Canada
| | - Matthew Heath
- School of Kinesiology, Faculty of Health Sciences, University of Western Ontario, 1151 Richmond St, London, ON N6A 3K7, Canada; Canadian Centre for Activity and Aging, University of Western Ontario, 1201 Western Rd, London, ON N6G 1H1, Canada; Graduate Program in Neuroscience, University of Western Ontario, 1151 Richmond St, London, ON N6A 3K7, Canada.
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Craig A, Pozzato I, Arora M, Middleton J, Rodrigues D, McBain C, Tran Y, Davis GM, Gopinath B, Kifley A, Krassioukov A, Braithwaite J, Mitchell R, Gustin SM, Schoffl J, Cameron ID. A neuro-cardiac self-regulation therapy to improve autonomic and neural function after SCI: a randomized controlled trial protocol. BMC Neurol 2021; 21:329. [PMID: 34445983 PMCID: PMC8387669 DOI: 10.1186/s12883-021-02355-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 08/13/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Spinal cord injury (SCI) is associated with autonomic imbalance and significant secondary conditions, including cardiac and brain dysfunction that adversely impact health and wellbeing. This study will investigate the effectiveness (intention-to-treat) of a neuro-cardiac self-regulation therapy to improve autonomic and neural/brain activity in adults with SCI living in the community. METHODS A two-arm parallel, randomised controlled trial in which adults with SCI living in the community post-rehabilitation will be randomly assigned to a treatment or control group. The treatment group (N = 60) aged 18-70 years with a chronic traumatic or non-traumatic SCI, will receive intervention sessions once per week for 10 weeks, designed to regulate autonomic activity using computer-based feedback of heart rate variability and controlled breathing (called HRV-F). Comprehensive neurophysiological and psychological assessment will occur at baseline, immediate post-treatment, and 6 and 12-months post-treatment. Primary outcome measures include electrocardiography/heart rate variability (to assess autonomic nervous system function) and transcranial doppler sonography (to assess cerebral blood circulation in basal cerebral arteries). Secondary outcomes measures include continuous blood pressure, electroencephalography, functional near-infrared spectroscopy, respiration/breath rate, electrooculography, cognitive capacity, psychological status, pain, fatigue, sleep and quality of life. Controls (N = 60) will receive usual community care, reading material and a brief telephone call once per week for 10 weeks and be similarly assessed over the same time period as the HRV-F group. Linear mixed model analysis with repeated measures will determine effectiveness of HRV-F and latent class mixture modelling used to determine trajectories for primary and selected secondary outcomes of interest. DISCUSSION Treatments for improving autonomic function after SCI are limited. It is therefore important to establish whether a neuro-cardiac self-regulation therapy can result in improved autonomic functioning post-SCI, as well as whether HRV-F is associated with better outcomes for secondary conditions such as cardiovascular health, cognitive capacity and mental health. TRIAL REGISTRATION The study has been prospectively registered with the Australian and New Zealand Clinical Trial Registry ( ACTRN12621000870853 .aspx). Date of Registration: 6th July 2021. Trial Sponsor: The University of Sydney, NSW 2006. Protocol version: 22/07/2021.
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Affiliation(s)
- Ashley Craig
- John Walsh Centre Rehabilitation Research, Northern Sydney Local Health District, The Kolling Institute, Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, St Leonards, NSW, 2065, Australia.
| | - Ilaria Pozzato
- John Walsh Centre Rehabilitation Research, Northern Sydney Local Health District, The Kolling Institute, Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, St Leonards, NSW, 2065, Australia
| | - Mohit Arora
- John Walsh Centre Rehabilitation Research, Northern Sydney Local Health District, The Kolling Institute, Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, St Leonards, NSW, 2065, Australia
| | - James Middleton
- John Walsh Centre Rehabilitation Research, Northern Sydney Local Health District, The Kolling Institute, Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, St Leonards, NSW, 2065, Australia
| | - Dianah Rodrigues
- John Walsh Centre Rehabilitation Research, Northern Sydney Local Health District, The Kolling Institute, Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, St Leonards, NSW, 2065, Australia
| | - Candice McBain
- John Walsh Centre Rehabilitation Research, Northern Sydney Local Health District, The Kolling Institute, Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, St Leonards, NSW, 2065, Australia
| | - Yvonne Tran
- Macquarie University Hearing (MU Hearing), Macquarie University, North Ryde, NSW, 2113, Australia
| | - Glen M Davis
- Exercise and Sports Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
| | - Bamini Gopinath
- Macquarie University Hearing (MU Hearing), Macquarie University, North Ryde, NSW, 2113, Australia
| | - Annette Kifley
- John Walsh Centre Rehabilitation Research, Northern Sydney Local Health District, The Kolling Institute, Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, St Leonards, NSW, 2065, Australia
| | - Andrei Krassioukov
- ICORD, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, V5Z 1M9, Canada
| | - Jeffrey Braithwaite
- Centre for Healthcare Resilience and Implementation Science, Australian Institute of Health Innovation, Health Systems Research, Macquarie University, North Ryde, NSW, 2113, Australia
| | - Rebecca Mitchell
- Centre for Healthcare Resilience and Implementation Science, Australian Institute of Health Innovation, Health Systems Research, Macquarie University, North Ryde, NSW, 2113, Australia
| | - Sylvia M Gustin
- School of Psychology, Faculty of Science, University of New South Wales, Kensington, NSW, Australia
| | - Jacob Schoffl
- John Walsh Centre Rehabilitation Research, Northern Sydney Local Health District, The Kolling Institute, Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, St Leonards, NSW, 2065, Australia
| | - Ian D Cameron
- John Walsh Centre Rehabilitation Research, Northern Sydney Local Health District, The Kolling Institute, Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, St Leonards, NSW, 2065, Australia
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Duschek S, Hoffmann A, Reyes Del Paso GA, Montoro CI. Short-term cerebral blood flow variability in major depressive disorder. J Affect Disord 2021; 282:1120-1124. [PMID: 33601686 DOI: 10.1016/j.jad.2020.12.136] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 10/16/2020] [Accepted: 12/24/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND Previous research has documented reduced heart rate and blood pressure variability in major depressive disorder (MDD), suggesting a limited capacity for cardiovascular regulation and diminished homeostatic resources in the disorder. This study aimed to complement this knowledge by investigating short-term cerebral blood flow (CBF) variability in MDD. METHODS Using transcranial Doppler sonography, blood flow velocities in the middle cerebral arteries of both hemispheres were recorded in 35 MDD patients and 35 healthy controls, at rest and during serial subtraction task-induced mental stress. CBF variability was represented by the root mean square of successive differences (RMSSD) in the beat-to-beat mean, systolic and diastolic flow velocity. RESULTS Patients, as compared to controls, exhibited smaller mean and diastolic blood flow variability in MCA both at rest and during mental stress. Mean, systolic and diastolic blood flow variability were greater during the task than at rest. CBF variability did not differ between patient subgroups composed according to medication use. LIMITATIONS Potential effects of blood pressure and respiration on CBF variability could not be investigated. CONCLUSIONS The study revealed evidence of reduced short-term CBF variability in MDD. The task-induced CBF variability increase may be ascribed to neural activity associated with arithmetic processing. Lower blood pressure variability and deficient autonomic cardiovascular control may contribute to the reduction of short-term CBF variability seen in MDD. Short-term CBF variability reflects preserved interplay of regulatory mechanisms ensuring optimal blood and energy supply to the brain. Therefore, the results suggest impaired cerebroprotective mechanisms, associated with suboptimal cerebral performance.
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Affiliation(s)
- Stefan Duschek
- UMIT - Institute of Psychology, University for Health Sciences Medical Informatics and Technology, Eduard-Wallnöfer Zentrum 1, 6060 Hall in Tirol, Austria.
| | - Alexandra Hoffmann
- UMIT - Institute of Psychology, University for Health Sciences Medical Informatics and Technology, Eduard-Wallnöfer Zentrum 1, 6060 Hall in Tirol, Austria
| | | | - Casandra I Montoro
- UMIT - Institute of Psychology, University for Health Sciences Medical Informatics and Technology, Eduard-Wallnöfer Zentrum 1, 6060 Hall in Tirol, Austria
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Egger ST, Bobes J, Rauen K, Seifritz E, Vetter S, Schuepbach D. Psychopathological Symptom Load and Distinguishable Cerebral Blood Flow Velocity Patterns in Patients With Schizophrenia and Healthy Controls: A Functional Transcranial Doppler Study. Front Psychiatry 2021; 12:679021. [PMID: 34248715 PMCID: PMC8267584 DOI: 10.3389/fpsyt.2021.679021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 05/21/2021] [Indexed: 01/03/2023] Open
Abstract
Introduction: Schizophrenia is a severe psychiatric disorder, with executive dysfunction and impaired processing speed playing a pivotal role in the course of the disease. In patients with schizophrenia, neurocognitive deficits appear to be related to alterations in cerebral hemodynamics. It is not fully understood if psychopathological symptom load (i.e., presence and severity of symptoms) is also related to alterations in cerebral hemodynamics. We aim to study the relationship between psychopathological symptom load and cerebral hemodynamics in the Middle Cerebral Artery (MCA) during a cognitive task in patients with schizophrenia and healthy controls. Methodology: Cerebral hemodynamics in the MCA were examined in 30 patients with schizophrenia and 15 healthy controls using functional Transcranial Doppler (fTCD) during the Trail Making Test (TMT). Psychopathological symptoms were measured using the Brief Psychiatric Rating Scale (BPRS). Patients were dichotomized according to BPRS scores: mild-moderate (BPRS < 41, n = 15) or marked-severe (BPRS ≧ 41, n = 15). Mean blood flow velocity (MFV) in the MCA and processing speed of the TMT were analyzed. Cerebral hemodynamics were analyzed using the general additional model (GAM) with a covariate analysis of variance (ANCOVA) for group comparisons. Results: Patients and healthy controls were comparable regarding demographics. Patients had a slower processing speed for the TMT-A (patients-severe: 52s, patients-moderate: 40s, healthy-controls: 32s, p = 0.019) and TMT-B [patients-severe: 111s, patients-moderate: 76s, healthy-controls: 66s, p < 0.001)]. Patients demonstrated differing hemodynamic profiles in both TMTs: TMT- A [F (6, 1,792) = 17, p < 0.000); TMT-B [F (6, 2,692) = 61.93, p < 0.000], with a delay in increase in MFV and a failure to return to baseline values. Conclusions: Patients with schizophrenia demonstrated slower speeds of processing during both the TMT-A and TMT-B. The speed of processing deteriorated with increasing psychopathological symptom load, additionally a distinct cerebral hemodynamic pattern in the MCA was observed. Our results further support the view that severity of schizophrenia, particularly psychopathological symptom load, influences performance in neurocognitive tasks and is related to distinct patterns of brain hemodynamics.
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Affiliation(s)
- Stephan T Egger
- Department of Psychiatry, Psychotherapy and Psychosomatics, Faculty of Medicine, University Hospital of Zurich, University of Zürich, Zurich, Switzerland.,Department of Psychiatry, Faculty of Medicine, University of Oviedo, Oviedo, Spain
| | - Julio Bobes
- Department of Psychiatry, Faculty of Medicine, University of Oviedo, Oviedo, Spain
| | - Katrin Rauen
- Department of Geriatric Psychiatry, Faculty of Medicine, Psychiatric University Hospital of Zurich, University of Zürich, Zurich, Switzerland.,Institute for Stroke and Dementia Research, Ludwig Maximilian University Munich, University Hospital, Munich, Germany
| | - Erich Seifritz
- Department of Psychiatry, Psychotherapy and Psychosomatics, Faculty of Medicine, University Hospital of Zurich, University of Zürich, Zurich, Switzerland
| | - Stefan Vetter
- Department of Psychiatry, Psychotherapy and Psychosomatics, Faculty of Medicine, University Hospital of Zurich, University of Zürich, Zurich, Switzerland
| | - Daniel Schuepbach
- Department of General Psychiatry, Center of Psychosocial Medicine, University of Heidelberg, Heidelberg, Germany.,Klinikum am Weissenhof, Weinsberg, Germany
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Haight JM. Adaptive automation and its health and safety challenges. JOURNAL OF SAFETY RESEARCH 2020; 74:149-152. [PMID: 32951777 DOI: 10.1016/j.jsr.2020.06.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 06/23/2020] [Indexed: 06/11/2023]
Affiliation(s)
- Joel M Haight
- Industrial Engineering, University of Pittsburgh, United States.
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12
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Zhu Y, Rodriguez-Paras C, Rhee J, Mehta RK. Methodological Approaches and Recommendations for Functional Near-Infrared Spectroscopy Applications in HF/E Research. HUMAN FACTORS 2020; 62:613-642. [PMID: 31107601 DOI: 10.1177/0018720819845275] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
OBJECTIVE The objective of this study was to systematically document current methods and protocols employed when using functional near-infrared spectroscopy (fNIRS) techniques in human factors and ergonomics (HF/E) research and generate recommendations for conducting and reporting fNIRS findings in HF/E applications. METHOD A total of 1,687 articles were identified through Ovid-MEDLINE, PubMed, Web of Science, and Scopus databases, of which 37 articles were included in the review based on review inclusion/exclusion criteria. RESULTS A majority of the HF/E fNIRS investigations were found in transportation, both ground and aviation, and in assessing cognitive (e.g., workload, working memory) over physical constructs. There were large variations pertaining to data cleaning, processing, and analysis approaches across the studies that warrant standardization of methodological approaches. The review identified major challenges in transparency and reporting of important fNIRS data collection and analyses specifications that diminishes study replicability, introduces potential biases, and increases likelihood of inaccurate results. As such, results reported in existing fNIRS studies need to be cautiously approached. CONCLUSION To improve the quality of fNIRS investigations and/or to facilitate its adoption and integration in different HF/E applications, such as occupational ergonomics and rehabilitation, recommendations for fNIRS data collection, processing, analysis, and reporting are provided.
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Affiliation(s)
- Yibo Zhu
- 14736 Texas A&M University, College Station, USA
| | | | - Joohyun Rhee
- 14736 Texas A&M University, College Station, USA
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13
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Greenlee ET, Lui TG. An Examination of Compensatory Effort in a Vigilance Task Using Transcranial Doppler Sonography. ACTA ACUST UNITED AC 2019. [DOI: 10.1177/1071181319631426] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
This study uses a novel neuroergonomic approach to determine whether blood flow to the frontal cortex is sensitive to task demands and indicative of compensatory effort regulation that may occur in response to the vigilance decrement. The present study used transcranial Doppler sonography (TCD) to examine the anterior cerebral artery (ACA) and its response to different demands of a vigilance task over time. Participants completed a vigilance task in a slow or fast event rate condition. The results demonstrated a vigilance decrement in both conditions and that workload was higher when the event rate was faster. However, blood flow velocity in the ACA did not change as a function of time, nor was it sensitive to the event rate manipulation. While previous research has shown that TCD is a useful neuroergonomic tool for vigilance monitoring, current results indicate that TCD monitoring of the ACA may not be worthwhile.
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14
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Gutteridge DS, Saredakis D, Badcock NA, Collins-Praino LE, Keage HAD. Cerebrovascular function during cognition in Parkinson's disease: A functional transcranial Doppler sonography study. J Neurol Sci 2019; 408:116578. [PMID: 31751909 DOI: 10.1016/j.jns.2019.116578] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 10/21/2019] [Accepted: 11/11/2019] [Indexed: 02/05/2023]
Abstract
OBJECTIVE Recent evidence has linked cerebrovascular abnormalities with Parkinson's Disease (PD), which may provide a new neurophysiological understanding of cognitive impairment in PD. The current study aimed to compare cerebrovascular functioning, during a cognitive task and at rest, in those with and without PD. METHODS Idiopathic PD patients (n = 30) and age- and gender-matched healthy controls (n = 30) undertook cognitive testing and completed a word generation task while blood flow velocity was monitored bilaterally with functional transcranial Doppler sonography (fTCD) of the middle cerebral arteries. The lateralisation index and its standard deviation and timing, along with the maximum peak velocity for the left and right hemispheres and their latencies and standard deviations, were calculated for each participant. RESULTS The PD patients showed significantly more variability of the lateralisation index compared to the control group; but there were no differences in the lateralisation index itself nor in the peak velocities. In the PD group, the variability in the peak velocities showed significant positive correlations with performance on executive function tests. CONCLUSION Normal ageing has been associated with a reduction in the lateralisation index, but no alterations in the standard deviation, suggesting that cerebrovascular functional changes associated with PD differ from those of typical ageing. The within-subject variability observed in the PD group indicate abnormalities within the neurovascular coupling response. Further, the association between the within-subject variability and executive functioning in the PD group, suggests that cerebrovascular dysfunction plays an important role in cognitive impairment in PD.
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Affiliation(s)
- Daria S Gutteridge
- Cognitive Ageing and Impairment Neurosciences Laboratory, School of Psychology, Social Work and Social Policy, University of South Australia, Australia.
| | - Dimitrios Saredakis
- Cognitive Ageing and Impairment Neurosciences Laboratory, School of Psychology, Social Work and Social Policy, University of South Australia, Australia
| | - Nicholas A Badcock
- ARC Centre of Excellence in Cognition and its Disorders, Department of Cognitive Science, Macquarie University, Australia
| | - Lyndsey E Collins-Praino
- Cognition, Ageing and Neurodegenerative Disease Laboratory, Adelaide Medical School, University of Adelaide, Australia
| | - Hannah A D Keage
- Cognitive Ageing and Impairment Neurosciences Laboratory, School of Psychology, Social Work and Social Policy, University of South Australia, Australia
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15
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Cerebral blood flow responses during prosaccade and antisaccade preparation in major depression. Eur Arch Psychiatry Clin Neurosci 2019; 269:813-822. [PMID: 30421150 DOI: 10.1007/s00406-018-0956-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 11/03/2018] [Indexed: 12/17/2022]
Abstract
While impairments in executive functions have been well established in major depressive disorder (MDD), specific deficits in proactive control have scarcely been studied so far. Proactive control refers to cognitive processes during anticipation of a behaviorally relevant event that facilitate readiness to react. In this study, cerebral blood flow responses were investigated in MDD patients during a precued antisaccade task requiring preparatory attention and proactive inhibition. Using functional transcranial Doppler sonography, blood flow velocities in the middle cerebral arteries of both hemispheres were recorded in 40 MDD patients and 40 healthy controls. In the task, a target appeared left or right of the fixation point 5 s after a cuing stimulus; subjects had to move their gaze to the target (prosaccade) or its mirror image position (antisaccade). Video-based eye-tracking was applied for ocular recording. A right dominant blood flow increase arose during prosaccade and antisaccade preparation, which was smaller in MDD patients than controls. Patients exhibited a higher error rate than controls for antisaccades but not prosaccades. The smaller blood flow response may reflect blunted anticipatory activation of the dorsolateral prefrontal and inferior parietal cortices in MDD. The patients' increased antisaccade error rate suggests deficient inhibitory control. The findings support the notion of impairments in proactive control in MDD, which are clinically relevant as they may contribute to the deficits in cognition and behavioral regulation that characterize the disorder.
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16
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Pongsakornsathien N, Lim Y, Gardi A, Hilton S, Planke L, Sabatini R, Kistan T, Ezer N. Sensor Networks for Aerospace Human-Machine Systems. SENSORS 2019; 19:s19163465. [PMID: 31398917 PMCID: PMC6720637 DOI: 10.3390/s19163465] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 08/03/2019] [Accepted: 08/05/2019] [Indexed: 11/16/2022]
Abstract
Intelligent automation and trusted autonomy are being introduced in aerospace cyber-physical systems to support diverse tasks including data processing, decision-making, information sharing and mission execution. Due to the increasing level of integration/collaboration between humans and automation in these tasks, the operational performance of closed-loop human-machine systems can be enhanced when the machine monitors the operator's cognitive states and adapts to them in order to maximise the effectiveness of the Human-Machine Interfaces and Interactions (HMI2). Technological developments have led to neurophysiological observations becoming a reliable methodology to evaluate the human operator's states using a variety of wearable and remote sensors. The adoption of sensor networks can be seen as an evolution of this approach, as there are notable advantages if these sensors collect and exchange data in real-time, while their operation is controlled remotely and synchronised. This paper discusses recent advances in sensor networks for aerospace cyber-physical systems, focusing on Cognitive HMI2 (CHMI2) implementations. The key neurophysiological measurements used in this context and their relationship with the operator's cognitive states are discussed. Suitable data analysis techniques based on machine learning and statistical inference are also presented, as these techniques allow processing both neurophysiological and operational data to obtain accurate cognitive state estimations. Lastly, to support the development of sensor networks for CHMI2 applications, the paper addresses the performance characterisation of various state-of-the-art sensors and the propagation of measurement uncertainties through a machine learning-based inference engine. Results show that a proper sensor selection and integration can support the implementation of effective human-machine systems for various challenging aerospace applications, including Air Traffic Management (ATM), commercial airliner Single-Pilot Operations (SIPO), one-to-many Unmanned Aircraft Systems (UAS), and space operations management.
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Affiliation(s)
| | - Yixiang Lim
- RMIT University-School of Engineering, Bundoora, VIC 3083, Australia
| | - Alessandro Gardi
- RMIT University-School of Engineering, Bundoora, VIC 3083, Australia
| | - Samuel Hilton
- RMIT University-School of Engineering, Bundoora, VIC 3083, Australia
| | - Lars Planke
- RMIT University-School of Engineering, Bundoora, VIC 3083, Australia
| | - Roberto Sabatini
- RMIT University-School of Engineering, Bundoora, VIC 3083, Australia.
| | - Trevor Kistan
- THALES Australia, WTC North Wharf, Melbourne, VIC 3000, Australia
| | - Neta Ezer
- Northrop Grumman Corporation, 1550 W. Nursery Rd, Linthicum Heights, MD 21090, USA
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Conradi N, Hermsen A, Krause K, Gorny I, Strzelczyk A, Knake S, Rosenow F. Hemispheric language lateralization in presurgical patients with temporal lobe epilepsy: Improving the retest reliability of functional transcranial Doppler sonography. Epilepsy Behav 2019; 91:48-52. [PMID: 30217756 DOI: 10.1016/j.yebeh.2018.08.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 08/09/2018] [Accepted: 08/12/2018] [Indexed: 11/16/2022]
Abstract
Since its introduction, functional transcranial Doppler sonography (fTCD) has been extensively applied in research and clinical settings and has now become part of the routine presurgical work-up of patients with epilepsy. Because of its importance in planning neurosurgical interventions and predicting possible cognitive risks, the reproducibility of fTCD in determining hemispheric language lateralization (HLL) has to be ensured. In the present study, fTCD was performed twice in 33 initially lateralized patients with temporal lobe epilepsy (TLE) as part of their presurgical work-up, using a standard word generation paradigm. Initially, the standard analysis, including only the statistical examination of fTCD data, was applied, and a rather poor retest reliability of r = 0.41 was obtained (p = 0.017). Because of doubts concerning appropriate task performance in some patients, subsequently, a two-step data analysis was introduced, including an additional qualitative evaluation of fTCD data regarding (1) instruction-compliant task performance, (2) sufficient quality of the baseline phase, and (3) adequate increase in cerebral blood flow velocity (CBFV) during the activation phase. Attributable to a more valid interpretation of fTCD data after the application of the qualitative step, the reproducibility of HLL significantly improved (p = 0.007) to a high retest reliability of r = 0.84 (p < 0.000). In clinical settings, psychological and situational factors seem to strongly influence the reproducibility of fTCD determining HLL. Accordingly, we highly recommend the complementation of the standard statistical examination of fTCD data by an additional qualitative evaluation (two-step data analysis), as this extra security is particularly desirable because of its direct implications for the further evaluation of neurosurgical interventions. This article is part of the Special Issue "Individualized Epilepsy Management: Medicines, Surgery and Beyond".
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Affiliation(s)
- Nadine Conradi
- Epilepsy Center Frankfurt Rhine-Main, Department of Neurology, Goethe University, Frankfurt am Main, Germany.
| | - Anke Hermsen
- Epilepsy Center Frankfurt Rhine-Main, Department of Neurology, Goethe University, Frankfurt am Main, Germany
| | - Kristina Krause
- Epilepsy Center Hessen, Department of Neurology, Philipps-University Marburg, Marburg, Germany
| | - Iris Gorny
- Epilepsy Center Hessen, Department of Neurology, Philipps-University Marburg, Marburg, Germany
| | - Adam Strzelczyk
- Epilepsy Center Frankfurt Rhine-Main, Department of Neurology, Goethe University, Frankfurt am Main, Germany
| | - Susanne Knake
- Epilepsy Center Hessen, Department of Neurology, Philipps-University Marburg, Marburg, Germany
| | - Felix Rosenow
- Epilepsy Center Frankfurt Rhine-Main, Department of Neurology, Goethe University, Frankfurt am Main, Germany
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Shaw TH, Curby TW, Satterfield K, Monfort SS, Ramirez R. Transcranial Doppler sonography reveals sustained attention deficits in young adults diagnosed with ADHD. Exp Brain Res 2018; 237:511-520. [DOI: 10.1007/s00221-018-5432-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Accepted: 11/12/2018] [Indexed: 10/27/2022]
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Duschek S, Hoffmann A, Montoro CI, Bair A, Reyes Del Paso GA, Ettinger U. Cerebral blood flow modulations during antisaccade preparation in chronic hypotension. Psychophysiology 2018; 56:e13305. [PMID: 30456801 DOI: 10.1111/psyp.13305] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 10/19/2018] [Accepted: 10/21/2018] [Indexed: 01/11/2023]
Abstract
In addition to symptoms including fatigue, dizziness, reduced drive, or mood disturbance, individuals with chronic low blood pressure (hypotension) frequently report cognitive complaints. While attentional deficits have been empirically confirmed, it is still unknown whether the impairments also encompass executive functions. This study investigated cerebral blood flow modulations in hypotension during a precued antisaccade/prosaccade task requiring the executive function of proactive inhibition in addition to preparatory attention. Using functional transcranial Doppler sonography, bilateral blood flow velocities in the middle cerebral arteries (MCA) were recorded in 39 hypotensive and 40 normotensive participants. In the task, a stimulus appeared left or right of a fixation point 5 s after a cuing stimulus; subjects had to move their gaze to the mirror image position of the stimulus (antisaccade) or toward it (prosaccade control condition). Video-based eye tracking was used for ocular recording. A right dominant MCA blood flow increase arose during task preparation, which was smaller in hypotensive than normotensive participants. In addition, hypotensive participants exhibited lower peak velocity of the saccadic response. The extent of the reductions in blood flow and task performance in hypotension did not differ between antisaccade and prosaccade conditions. The smaller MCA flow increase may reflect reduced activity in the dorsolateral prefrontal and inferior parietal cortices during proactive inhibition and preparatory attention in hypotension. Given that group differences in blood flow and performance arose independent of task complexity and executive function load, hypotension may be characterized by basic attentional impairments rather than particular executive function deficits.
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Affiliation(s)
- Stefan Duschek
- UMIT-University of Health Sciences Medical Informatics and Technology, Institute of Psychology, Hall in Tirol, Austria
| | - Alexandra Hoffmann
- UMIT-University of Health Sciences Medical Informatics and Technology, Institute of Psychology, Hall in Tirol, Austria
| | - Casandra I Montoro
- UMIT-University of Health Sciences Medical Informatics and Technology, Institute of Psychology, Hall in Tirol, Austria
| | - Angela Bair
- UMIT-University of Health Sciences Medical Informatics and Technology, Institute of Psychology, Hall in Tirol, Austria
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Hoffmann A, Montoro CI, Reyes del Paso GA, Duschek S. Cerebral blood flow modulations during proactive control in major depressive disorder. Int J Psychophysiol 2018; 133:175-181. [DOI: 10.1016/j.ijpsycho.2018.07.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 06/13/2018] [Accepted: 07/05/2018] [Indexed: 02/06/2023]
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Montoro CI, Duschek S, Schuepbach D, Gandarillas M, Reyes del Paso GA. Cerebral blood flow variability in fibromyalgia syndrome: Relationships with emotional, clinical and functional variables. PLoS One 2018; 13:e0204267. [PMID: 30235315 PMCID: PMC6147545 DOI: 10.1371/journal.pone.0204267] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 09/04/2018] [Indexed: 01/04/2023] Open
Abstract
OBJECTIVE This study analyzed variability in cerebral blood flow velocity (CBFV) and its association with emotional, clinical and functional variables and medication use in fibromyalgia syndrome (FMS). METHODS Using transcranial Doppler sonography, CBFV were bilaterally recorded in the anterior (ACA) and middle (MCA) cerebral arteries of 44 FMS patients and 31 healthy individuals during a 5-min resting period. Participants also completed questionnaires assessing pain, fatigue, insomnia, anxiety, depression and health-related quality of life (HRQoL). RESULTS Fast Fourier transformation revealed a spectral profile with four components: (1) a first very low frequency (VLF) component with the highest amplitude at 0.0024 Hz; (2) a second VLF component around 0.01-to-0.025 Hz; (3) a low frequency (LF) component from 0.075-to-0.11 Hz; and (4) a high frequency (HF) component with the lowest amplitude from 0.25-to-0.35 Hz. Compared to controls, FMS patients exhibited lower LF and HF CBFV variability in the MCAs (p < .005) and right ACA (p = .03), but higher variability at the first right MCA (p = .04) and left ACA (p = .005) VLF components. Emotional, clinical and functional variables were inversely related to LF and HF CBFV variability (r≥-.24, p≤.05). However, associations for the first VLF component were positive (r≥.28, p≤.05). While patients´ medication use was associated with lower CBFV variability, comorbid depression and anxiety disorders were unrelated to variability. CONCLUSIONS Lower CBFV variability in the LF and HF ranges were observed in FMS, suggesting impaired coordination of cerebral regulatory systems. CBFV variability was differentially associated with clinical variables as a function of time-scale, with short-term variability being related to better clinical outcomes. CBFV variability analysis may be a promising tool to characterize FMS pathology and it impact on facets of HRQoL.
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Affiliation(s)
| | - Stefan Duschek
- UMIT—University for Health Sciences Medical Informatics and Technology, Hall in Tirol, Austria
| | - Daniel Schuepbach
- Klinikum am Weissenhof, Zentrum für Psychiatrie Weinsberg, Weinsberg, Germany
- University of Heidelberg, Department of General Psychiatry, Center of Psychosocial Medicine, Heidelberg, Germany
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Hoffmann A, Montoro CI, Reyes Del Paso GA, Duschek S. Cerebral blood flow modulations during cognitive control in major depressive disorder. J Affect Disord 2018; 237:118-125. [PMID: 29803902 DOI: 10.1016/j.jad.2018.05.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 04/23/2018] [Accepted: 05/13/2018] [Indexed: 01/25/2023]
Abstract
BACKGROUND This study investigated cerebral blood flow modulations during proactive and reactive cognitive control in major depressive disorder (MDD). Proactive control refers to preparatory processes during anticipation of a behaviorally relevant event; reactive control is activated after such an event to ensure goal attainment. METHODS Using functional transcranial Doppler sonography, blood flow velocities in the middle cerebral arteries of both hemispheres were recorded in 40 MDD patients and 40 healthy controls during a precued Stroop task. The font color of color words, which appeared 5 s after an acoustic warning signal, had to be indicated while ignoring word meaning. RESULTS Patients, as compared to controls, exhibited smaller bilateral blood flow increases during task preparation and larger increases after color word presentation. Response time was longer in patients irrespective of the match or mismatch between font color and word meaning. The blood flow increase after word presentation correlated positively with response time. LIMITATIONS Potential effects of psychotropic medication on cognition and cerebral blood flow could not be controlled. CONCLUSIONS The study revealed evidence of reduced cortical activity during proactive and elevated activity that occurs during reactive control in MDD. Deficient implementation of proactive control in MDD may lead to increased reliance on reactive control. The association between the blood flow increase after color word presentation and poorer performance indicates that deficient response preparation cannot be compensated for by reactive strategies. The findings are clinically relevant, as they may contribute to our understanding of the mechanisms relevant to cognitive impairments in MDD.
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Affiliation(s)
- Alexandra Hoffmann
- UMIT - Institute of Psychology, University for Health Sciences Medical Informatics and Technology, Eduard-Wallnöfer Zentrum 1, Hall in Tirol 6060, Austria.
| | | | | | - Stefan Duschek
- UMIT - Institute of Psychology, University for Health Sciences Medical Informatics and Technology, Eduard-Wallnöfer Zentrum 1, Hall in Tirol 6060, Austria
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Duschek S, Hoffmann A, Montoro CI, Reyes Del Paso GA, Schuepbach D, Ettinger U. Cerebral blood flow modulations during preparatory attention and proactive inhibition. Biol Psychol 2018; 137:65-72. [PMID: 30006269 DOI: 10.1016/j.biopsycho.2018.07.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 07/05/2018] [Accepted: 07/06/2018] [Indexed: 01/07/2023]
Abstract
This study investigated cerebral blood flow modulations during task preparation in a precued saccade paradigm. Bilateral blood flow velocities in the middle cerebral arteries were recorded in 48 subjects using functional transcranial Doppler sonography. Video-based eye-tracking was applied for ocular recording. Antisaccade and prosaccade trials were presented in both block-wise and interleaved order. A right dominant flow response arose during task preparation. While the response was stronger during antisaccade than prosaccade trials, the degree of lateralisation did not differ between the two trial types. Direction error rates were higher and latencies were longer for antisaccades than prosaccades. There were no differences between block-wise and interleaved trials in blood flow or performance. The stronger blood flow increases during antisaccade than prosaccade preparation reflects the complexity of the upcoming task demands as well as proactive inhibition. The right hemispheric lateralisation may be attributed to preparatory attention independent of demands on inhibitory control.
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Affiliation(s)
- Stefan Duschek
- UMIT - Institute of Psychology, University for Health Sciences Medical Informatics and Technology, Eduard Wallnöfer-Zentrum 1, 6060 Hall in Tirol, Austria.
| | - Alexandra Hoffmann
- UMIT - Institute of Psychology, University for Health Sciences Medical Informatics and Technology, Eduard Wallnöfer-Zentrum 1, 6060 Hall in Tirol, Austria.
| | - Casandra I Montoro
- UMIT - Institute of Psychology, University for Health Sciences Medical Informatics and Technology, Eduard Wallnöfer-Zentrum 1, 6060 Hall in Tirol, Austria.
| | | | - Daniel Schuepbach
- Hospital Weissenhof, Weinsberg, Department of General Psychiatry, University of Heidelberg, 74189 Weinsberg, Germany.
| | - Ulrich Ettinger
- Department of Psychology, University of Bonn, Kaiser-Karl-Ring 9, 53111 Bonn, Germany.
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Rey B, Rodríguez A, Lloréns-Bufort E, Tembl J, Muñoz MÁ, Montoya P, Herrero-Bosch V, Monzo JM. Design and Validation of an FPGA-Based Configurable Transcranial Doppler Neurofeedback System for Chronic Pain Patients. SENSORS 2018; 18:s18072278. [PMID: 30011900 PMCID: PMC6069097 DOI: 10.3390/s18072278] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 07/09/2018] [Accepted: 07/12/2018] [Indexed: 11/23/2022]
Abstract
Neurofeedback is a self-regulation technique that can be applied to learn to voluntarily control cerebral activity in specific brain regions. In this work, a Transcranial Doppler-based configurable neurofeedback system is proposed and described. The hardware configuration is based on the Red Pitaya board, which gives great flexibility and processing power to the system. The parameter to be trained can be selected between several temporal, spectral, or complexity features from the cerebral blood flow velocity signal in different vessels. As previous studies have found alterations in these parameters in chronic pain patients, the system could be applied to help them to voluntarily control these parameters. Two protocols based on different temporal lengths of the training periods have been proposed and tested with six healthy subjects that were randomly assigned to one of the protocols at the beginning of the procedure. For the purposes of the testing, the trained parameter was the mean cerebral blood flow velocity in the aggregated data from the two anterior cerebral arteries. Results show that, using the proposed neurofeedback system, the two groups of healthy volunteers can learn to self-regulate a parameter from their brain activity in a reduced number of training sessions.
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Affiliation(s)
- Beatriz Rey
- Departamento de Ingeniería Gráfica, Universitat Politècnica de València, Camino Vera s/n, 46022 Valencia, Spain.
| | - Alejandro Rodríguez
- Departamento de Ingeniería Gráfica, Universitat Politècnica de València, Camino Vera s/n, 46022 Valencia, Spain.
| | - Enrique Lloréns-Bufort
- Instituto de Instrumentación para Imagen Molecular (I3M), Centro Mixto CSIC-Universitat Politècnica de València-CIEMAT, Camino de Vera s/n, 46022 Valencia, Spain.
| | - José Tembl
- Departamento de Neurología, Hospital Universitari i Politècnic La Fe, 46026 Valencia, Spain.
| | - Miguel Ángel Muñoz
- Departamento de Personalidad, Evaluación y Tratamiento Psicológico, Universidad de Granada, 18071 Granada, Spain.
| | - Pedro Montoya
- Instituto Universitario de Investigación en Ciencias de la Salud, Universitat Illes Balears, 07122 Palma, Spain.
| | - Vicente Herrero-Bosch
- Instituto de Instrumentación para Imagen Molecular (I3M), Centro Mixto CSIC-Universitat Politècnica de València-CIEMAT, Camino de Vera s/n, 46022 Valencia, Spain.
| | - Jose M Monzo
- Instituto de Instrumentación para Imagen Molecular (I3M), Centro Mixto CSIC-Universitat Politècnica de València-CIEMAT, Camino de Vera s/n, 46022 Valencia, Spain.
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Duschek S, Hoffmann A, Bair A, Reyes Del Paso GA, Montoro CI. Cerebral blood flow modulations during proactive control in chronic hypotension. Brain Cogn 2018; 125:135-141. [PMID: 29990703 DOI: 10.1016/j.bandc.2018.06.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 06/24/2018] [Accepted: 06/27/2018] [Indexed: 10/28/2022]
Abstract
In addition to complaints including fatigue, mood disturbance, dizziness or cold limbs, chronic low blood pressure (hypotension) is associated with reduced cognitive performance. Deficiencies in cerebral blood flow regulation may contribute to this impairment. This study investigated cerebral blood flow modulations during proactive control in hypotension. Proactive control refers to cognitive processes during anticipation of a behaviourally relevant event that allow optimization of readiness to react. Using functional transcranial Doppler sonography, bilateral blood flow velocities in the middle cerebral arteries were recorded in 40 hypotensive and 40 normotensive participants during a precued Stroop task. Hypotensive participants exhibited smaller bilateral blood flow increases during response preparation and longer response time. The group differences in blood flow and response time did not vary by executive function load, i.e. congruent vs. incongruent trials. Over the total sample, the flow increase correlated negatively with response time in trials with a higher executive function load. The findings indicate reduced cerebral blood flow adjustment during both the basic and more complex requirements of proactive control in hypotension. They also suggest a general deficit in attentional function and processing speed due to low blood pressure and cerebral hemodynamic dysregulations rather than particular impairments in executive functions.
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Affiliation(s)
- Stefan Duschek
- UMIT - University of Health Sciences Medical Informatics and Technology, Institute of Psychology, Eduard-Wallnöfer-Zentrum 1, 6060 Hall in Tirol, Austria.
| | - Alexandra Hoffmann
- UMIT - University of Health Sciences Medical Informatics and Technology, Institute of Psychology, Eduard-Wallnöfer-Zentrum 1, 6060 Hall in Tirol, Austria.
| | - Angela Bair
- UMIT - University of Health Sciences Medical Informatics and Technology, Institute of Psychology, Eduard-Wallnöfer-Zentrum 1, 6060 Hall in Tirol, Austria.
| | | | - Casandra I Montoro
- UMIT - University of Health Sciences Medical Informatics and Technology, Institute of Psychology, Eduard-Wallnöfer-Zentrum 1, 6060 Hall in Tirol, Austria.
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Montoro CI, Duschek S, Reyes del Paso GA. Variability in cerebral blood flow velocity at rest and during mental stress in healthy individuals: Associations with cardiovascular parameters and cognitive performance. Biol Psychol 2018; 135:149-158. [DOI: 10.1016/j.biopsycho.2018.04.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Revised: 01/16/2018] [Accepted: 04/11/2018] [Indexed: 10/17/2022]
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An exploratory analysis of the influence of personality and emotional factors on cerebral blood flow responses during painful stimulation in Fibromyalgia. Scand J Psychol 2018; 59:301-310. [DOI: 10.1111/sjop.12434] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Accepted: 12/21/2017] [Indexed: 12/14/2022]
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Reproducibility of task activation using the Addenbrooke’s cognitive examination in healthy controls: A functional Transcranial Doppler ultrasonography study. J Neurosci Methods 2017; 291:131-140. [DOI: 10.1016/j.jneumeth.2017.08.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 08/04/2017] [Accepted: 08/14/2017] [Indexed: 11/22/2022]
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Understanding a role for hypoxia in lesion formation and location in the deep and periventricular white matter in small vessel disease and multiple sclerosis. Clin Sci (Lond) 2017; 131:2503-2524. [PMID: 29026001 DOI: 10.1042/cs20170981] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Revised: 08/01/2017] [Accepted: 08/15/2017] [Indexed: 12/28/2022]
Abstract
The deep and periventricular white matter is preferentially affected in several neurological disorders, including cerebral small vessel disease (SVD) and multiple sclerosis (MS), suggesting that common pathogenic mechanisms may be involved in this injury. Here we consider the potential pathogenic role of tissue hypoxia in lesion development, arising partly from the vascular anatomy of the affected white matter. Specifically, these regions are supplied by a sparse vasculature fed by long, narrow end arteries/arterioles that are vulnerable to oxygen desaturation if perfusion is reduced (as in SVD, MS and diabetes) or if the surrounding tissue is hypoxic (as in MS, at least). The oxygen crisis is exacerbated by a local preponderance of veins, as these can become highly desaturated 'sinks' for oxygen that deplete it from surrounding tissues. Additional haemodynamic deficiencies, including sluggish flow and impaired vasomotor reactivity and vessel compliance, further exacerbate oxygen insufficiency. The cells most vulnerable to hypoxic damage, including oligodendrocytes, die first, resulting in demyelination. Indeed, in preclinical models, demyelination is prevented if adequate oxygenation is maintained by raising inspired oxygen concentrations. In agreement with this interpretation, there is a predilection of lesions for the anterior and occipital horns of the lateral ventricles, namely regions located at arterial watersheds, or border zones, known to be especially susceptible to hypoperfusion and hypoxia. Finally, mitochondrial dysfunction due to genetic causes, as occurs in leucodystrophies or due to free radical damage, as occurs in MS, will compound any energy insufficiency resulting from hypoxia. Viewing lesion formation from the standpoint of tissue oxygenation not only reveals that lesion distribution is partly predictable, but may also inform new therapeutic strategies.
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Rodríguez A, Tembl J, Mesa-Gresa P, Muñoz MÁ, Montoya P, Rey B. Altered cerebral blood flow velocity features in fibromyalgia patients in resting-state conditions. PLoS One 2017; 12:e0180253. [PMID: 28700720 PMCID: PMC5507513 DOI: 10.1371/journal.pone.0180253] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 06/13/2017] [Indexed: 11/19/2022] Open
Abstract
The aim of this study is to characterize in resting-state conditions the cerebral blood flow velocity (CBFV) signals of fibromyalgia patients. The anterior and middle cerebral arteries of both hemispheres from 15 women with fibromyalgia and 15 healthy women were monitored using Transcranial Doppler (TCD) during a 5-minute eyes-closed resting period. Several signal processing methods based on time, information theory, frequency and time-frequency analyses were used in order to extract different features to characterize the CBFV signals in the different vessels. Main results indicated that, in comparison with control subjects, fibromyalgia patients showed a higher complexity of the envelope CBFV and a different distribution of the power spectral density. In addition, it has been observed that complexity and spectral features show correlations with clinical pain parameters and emotional factors. The characterization features were used in a lineal model to discriminate between fibromyalgia patients and healthy controls, providing a high accuracy. These findings indicate that CBFV signals, specifically their complexity and spectral characteristics, contain information that may be relevant for the assessment of fibromyalgia patients in resting-state conditions.
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Affiliation(s)
- Alejandro Rodríguez
- Departamento de Ingeniería Gráfica, Universitat Politècnica de València, Camino de Vera s/n, Valencia, Spain
| | - José Tembl
- Departamento de Neurología, Hospital Universitari i Politècnic La Fe, Valencia, Spain
| | - Patricia Mesa-Gresa
- Departamento Psicobiología, Facultad de Psicología, Universitat de València, Blasco Ibáñez 21, Valencia, Spain
| | - Miguel Ángel Muñoz
- Departamento de Personalidad, Evaluación y Tratamientos psicológicos, Universidad de Granada, Granada, Spain
| | - Pedro Montoya
- IUNICS, Universitat Illes Balears, Palma de Mallorca, Spain
| | - Beatriz Rey
- Departamento de Ingeniería Gráfica, Universitat Politècnica de València, Camino de Vera s/n, Valencia, Spain
- * E-mail:
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Connaughton VM, Amiruddin A, Clunies-Ross KL, French N, Fox AM. Assessing hemispheric specialization for processing arithmetic skills in adults: A functional transcranial doppler ultrasonography (fTCD) study. J Neurosci Methods 2017; 283:33-41. [DOI: 10.1016/j.jneumeth.2017.03.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 03/08/2017] [Accepted: 03/09/2017] [Indexed: 12/29/2022]
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Abstract
Sensitivity to signals arising within the body (interoceptive awareness) has been implicated in emotion processing; interindividual differences in interoceptive awareness modulate both subjective and physiological indicators of emotional experience and the regulation of emotion-related behaviors. This study investigated interoceptive awareness in patients with fibromyalgia syndrome (FMS), a chronic pain condition accompanied by various affective symptoms. Interoceptive awareness was assessed in 45 FMS patients and 31 healthy individuals using a heartbeat perception task. Cognitive performance, comorbid psychiatric disorders and medication use were assessed as possible confounding variables. Concerning the primary outcome, patients exhibited markedly reduced heartbeat perception compared to healthy individuals. Moreover, there was an inverse relationship between interoceptive awareness and FMS symptom severity. Reduced interoceptive awareness may be involved in the affective aspects of FMS pathology. Poor access to bodily signals may restrict patients´ ability to integrate these signals during emotional processing, which, by extension, may preclude optimal emotional self-regulation.
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Affiliation(s)
- Stefan Duschek
- a Institute of Psychology , UMIT - University for Health Sciences Medical Informatics and Technology , Hall in Tirol , Austria
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Funke ME, Warm JS, Matthews G, Funke GJ, Chiu PY, Shaw TH, Greenlee ET. The Neuroergonomics of Vigilance. HUMAN FACTORS 2017; 59:62-75. [PMID: 28146671 DOI: 10.1177/0018720816683121] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
OBJECTIVE The aim of this study was to examine the effects of uncertainty about where in the field of view critical signals for detection appear during a vigilance task (spatial uncertainty) on cerebral blood flow velocity (CBFV) and oculomotor fatigue. BACKGROUND Neuroergonomics is a dimension of human factors founded by Raja Parasuraman that studies brain functions underlying performance at work. Neuroergonomic studies have shown that observers in vigilance tasks lose information-processing resources over time and experience oculomotor fatigue as indexed by a temporal decline in CBFV and elevation in eye closure as reflected in the PERCLOS metric. Because spatial uncertainty increases an observer's need for visual scanning relative to a spatial certainty condition, it was anticipated that spatial uncertainty would result in a greater temporal decline in CBFV and increased eye closure in a vigilance session. METHOD Observers performed a simulated unmanned aerial vehicle (UAV) control task wherein collision flight paths were the events to be detected. UAV images could appear at random in any one of five locations on the controller's display (spatial uncertainty) or only in a fixed location (spatial certainty). RESULTS Signal detection was poorer in the spatial-uncertain relative to the certain condition, and predictions regarding CBFV and eye closure were confirmed. CONCLUSION Vigilance tasks involving spatial uncertainty are more neurophysiologically taxing than those in which spatial uncertainty is not a factor. APPLICATION The neuroergonomic approach helps in understanding the effects of psychophysical factors in vigilance and to signify when performance aiding is needed.
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Affiliation(s)
- Matthew E Funke
- Naval Medical Research Unit Dayton, Wright-Patterson Air Force Base, Ohio
| | - Joel S Warm
- Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio
| | | | - Gregory J Funke
- Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio
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Schuepbach D, Egger ST, Boeker H, Duschek S, Vetter S, Seifritz E, Herpertz SC. Determinants of cerebral hemodynamics during the Trail Making Test in schizophrenia. Brain Cogn 2016; 109:96-104. [PMID: 27648976 DOI: 10.1016/j.bandc.2016.09.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 09/08/2016] [Accepted: 09/08/2016] [Indexed: 10/21/2022]
Abstract
Patients with schizophrenia show deficits in cognitive functioning, and studies on cerebral hemodynamics have revealed aberrant patterns of mean cerebral blood flow velocity (MFV), an equivalent of cerebral blood flow (CBF). Therefore, we carried out a controlled study that assessed MFV in schizophrenia during a well-known neuropsychological task, the Trail Making Test (TMT). We measured MFV in the middle cerebral arteries using functional transcranial Doppler sonography in 15 schizophrenia patients and 15 healthy subjects. In comparison to healthy subjects, patients performed poorer on the TMT-A and the TMT-B, and there was increased cerebral blood flow velocity during the TMT-B. A comparison of subgroups of patients and controls matched in performance on the TMT-B revealed that these patients still showed significantly increased cerebral blood flow velocity. Increased MFV in schizophrenia suggests specific alterations of cerebral hemodynamics during the Trail Making Test, Part B, which are not detectable during visuomotor activity, and which are independent of performance. These findings emphasize the pathophysiological importance of cognitive functioning in schizophrenia, but cast doubts whether performance in this particular test plays a relevant role for CBF abnormalities in schizophrenia.
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Affiliation(s)
- Daniel Schuepbach
- Department of Psychiatry, Psychotherapy and Psychosomatics, Psychiatric University Hospital Zurich, Zurich, Switzerland; Department of General Psychiatry, Center of Psychosocial Medicine, University of Heidelberg, Heidelberg, Germany; Klinikum am Weissenhof, Weinsberg, Germany.
| | - Stephan T Egger
- Department of Psychiatry, Psychotherapy and Psychosomatics, Psychiatric University Hospital Zurich, Zurich, Switzerland
| | - Heinz Boeker
- Department of Psychiatry, Psychotherapy and Psychosomatics, Psychiatric University Hospital Zurich, Zurich, Switzerland
| | - Stefan Duschek
- Institute of Psychology, UMIT - University for Health Sciences, Medical Informatics and Technology, Hall in Tirol, Austria
| | - Stefan Vetter
- Department of Psychiatry, Psychotherapy and Psychosomatics, Psychiatric University Hospital Zurich, Zurich, Switzerland
| | - Erich Seifritz
- Department of Psychiatry, Psychotherapy and Psychosomatics, Psychiatric University Hospital Zurich, Zurich, Switzerland
| | - Sabine C Herpertz
- Department of General Psychiatry, Center of Psychosocial Medicine, University of Heidelberg, Heidelberg, Germany
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Montoro CI, Duschek S, de Guevara CML, Reyes del Paso GA. Patterns of Cerebral Blood Flow Modulation During Painful Stimulation in Fibromyalgia: A Transcranial Doppler Sonography Study. PAIN MEDICINE 2016; 17:2256-2267. [DOI: 10.1093/pm/pnw082] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Bleton H, Perera S, Sejdić E. Cognitive tasks and cerebral blood flow through anterior cerebral arteries: a study via functional transcranial Doppler ultrasound recordings. BMC Med Imaging 2016; 16:22. [PMID: 26969112 PMCID: PMC4788871 DOI: 10.1186/s12880-016-0125-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 02/29/2016] [Indexed: 01/12/2023] Open
Abstract
Background Functional transcanial Doppler ultrasound (fTCD) is a convenient approach to examine cerebral blood flow velocity (CBFV) in major cerebral arteries. Methods In this study, the anterior cerebral artery (ACA) was insonated on both sides, that is, right ACA (R-ACA) and left ACA (L-ACA). The envelope signals (the maximum velocity) and the raw signals were analyzed during cognitive processes, i.e. word-generation tasks, geometric tasks and resting state periods separating each task. Data which were collected from 20 healthy participants were used to investigate the changes and the hemispheric functioning while performing cognitive tasks. Signal characteristics were analyzed in time domain, frequency domain and time-frequency domain. Results Significant results have been obtained through the use of both classic/modern methods (i.e. envelope/raw, time and frequency/information-theoretic and time-frequency domains). The frequency features extracted from the raw signals highlighted sex effects on cerebral blood flow which revealed distinct brain response during each process and during resting periods. In the time-frequency analysis, the distribution of wavelet energies on the envelope signals moved around the low frequencies during mental processes and did not experience any lateralization during cognitive tasks. Conclusions Even if no lateralization effects were noticed during resting-state, verbal and geometric tasks, understanding CBFV in ACA during cognitive tasks could complement information extracted from cerebral blood flow in middle cerebral arteries during similar cognitive tasks (i.e. sex effects).
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Affiliation(s)
- Héloïse Bleton
- Department of Electrical and Computer Engineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - Subashan Perera
- Division of Geriatric Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Ervin Sejdić
- Department of Electrical and Computer Engineering, University of Pittsburgh, Pittsburgh, PA, USA.
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Shaw TH, Nguyen C, Satterfield K, Ramirez R, McKnight PE. Cerebral hemovelocity reveals differential resource allocation strategies for extraverts and introverts during vigilance. Exp Brain Res 2015; 234:577-85. [DOI: 10.1007/s00221-015-4481-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Accepted: 10/19/2015] [Indexed: 12/01/2022]
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Frid PE, Schreiber SJ, Pade O, Doepp F, Valdueza J. The Posterior Cerebral Artery and its Main Cortical Branches Identified with Noninvasive Transcranial Color-Coded Duplex Sonography. Ultrasound Int Open 2015; 1:E53-7. [PMID: 27689154 DOI: 10.1055/s-0035-1565130] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 10/12/2015] [Indexed: 10/22/2022] Open
Abstract
PURPOSE To differentiate PCA segments and cortical branches by means of transcranial color-coded duplex sonography (TCCD) and to measure flow parameters at rest and during visual stimulation. MATERIALS AND METHODS 60 healthy subjects with a good acoustic temporal bone window were examined. The main stem of the PCA (P1, P2 and P3) and 4 main cortical branches - the anterior temporal artery (ATA), the occipital temporal artery (OTA), the parietooccipital artery (POA) and the calcarine artery (CA) - were assessed using an axial transtemporal approach. Systolic and diastolic blood flow velocities (BFVs) were recorded at rest and during visual stimulation. RESULTS Identification of the P1 segment of the PCA was successful in 97.5% (117/120) of cases. The P2 and P3 segments were visualized in all cases. The 4 main cortical branches could be identified to varying degrees: ATA in 88%, OTA in 96%, POA in 69% and CA in 62%. There was an evoked flow response in the P2 main stem and in all cortical branches. The most pronounced increase in diastolic/systolic BFV after visual stimulation test was seen in the CA (42%/35%), followed by P2 (30%/24%), the POA (27%/27%), the OTA (16%/13%) and the ATA (9%/8%). CONCLUSION Insonation through the temporal bone window with TCCD confidently allows the assessment of the P1 to P3 segments of the PCA as well as the 2 proximal branches, the ATA and the OTA. An ultrasound-based classification of PCA anatomy and its cortical branches may be used as a noninvasive method for the evaluation of posterior circulation pathology.
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Affiliation(s)
- P E Frid
- Department of Neurology, Institute for Clinical Sciences, Malmö, Sweden
| | | | - O Pade
- Department of Neurology and Neurophysiology, AMEOS Klinikum Neustadt, Neustadt i. H., Germany
| | - F Doepp
- Department of Neurology, Charité Campus Virchow, Berlin, Germany
| | - J Valdueza
- Neurologie, Neurologisches Zentrum der Segeberger Kliniken, Bad Segeberg, Germany
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Lu J, Mamun KA, Chau T. Pattern classification to optimize the performance of Transcranial Doppler Ultrasonography-based brain machine interface. Pattern Recognit Lett 2015. [DOI: 10.1016/j.patrec.2015.07.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Greenlee ET, Funke GJ, Warm JS, Finomore VS, Patterson RE, Barnes LE, Funke ME, Vidulich MA. Effects of Stereoscopic Depth on Vigilance Performance and Cerebral Hemodynamics. HUMAN FACTORS 2015; 57:1063-1075. [PMID: 25850115 DOI: 10.1177/0018720815572468] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 01/01/2015] [Indexed: 06/04/2023]
Abstract
OBJECTIVE We tested the possibility that monitoring a display wherein critical signals for detection were defined by a stereoscopic three-dimensional (3-D) image might be more resistant to the vigilance decrement, and to temporal declines in cerebral blood flow velocity (CBFV), than monitoring a display featuring a customary two-dimensional (2-D) image. BACKGROUND Hancock has asserted that vigilance studies typically employ stimuli for detection that do not exemplify those that occur in the natural world. As a result, human performance is suboptimal. From this perspective, tasks that better approximate perception in natural environments should enhance performance efficiency. To test that possibility, we made use of stereopsis, an important means by which observers interact with their everyday surroundings. METHOD Observers monitored a circular display in which a vertical line was embedded. Critical signals for detection in a 2-D condition were instances in which the line was rotated clockwise from vertical. In a 3-D condition, critical signals were cases in which the line appeared to move outward toward the observer. RESULTS The overall level of signal detection and the stability of detection over time were greater when observers monitored for 3-D changes in target depth compared to 2-D changes in target orientation. However, the 3-D display did not retard the temporal decline in CBFV. CONCLUSION These results provide the initial demonstration that 3-D displays can enhance performance in vigilance tasks. APPLICATION The use of 3-D displays may be productive in augmenting system reliability when operator vigilance is vital.
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Affiliation(s)
| | - Gregory J Funke
- Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio
| | - Joel S Warm
- University of Dayton Research Institute, Dayton, Ohio
| | - Victor S Finomore
- Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio
| | | | - Laura E Barnes
- Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio
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de Joux NR, Wilson K, Russell PN, Helton WS. The effects of a transition between local and global processing on vigilance performance. J Clin Exp Neuropsychol 2015; 37:888-98. [PMID: 26240987 DOI: 10.1080/13803395.2015.1068744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Sixty participants performed a sustained attention task in which they were required to perform either global or local feature discrimination. Two groups required just one type of discrimination, while the remaining two groups started on one type of discrimination before transitioning to the other type halfway through. A transition resulted in worse performance when compared to no transition. It was also found that the local discrimination group showed improved performance over time compared to the global discrimination group. Functional near-infrared spectroscopy (fNIRS) was used to measure blood oxygenation during the task and was used as an index of cerebral hemodynamic activity. Total oxygenation was found to increase more in global discrimination tasks. It was also found that the left prefrontal cortex showed little change in nontransition tasks while in transition tasks it followed the same trend as the right prefrontal cortex. Combined with performance data, it suggests that an increased utilization of bilateral resources may in some cases improve performance over time.
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Affiliation(s)
- Neil R de Joux
- a Department of Psychology , University of Canterbury , Christchurch , New Zealand
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Becker A, Mandell AR, Tangney JP, Chrosniak LD, Shaw TH. The effects of self-control on cognitive resource allocation during sustained attention: a transcranial Doppler investigation. Exp Brain Res 2015; 233:2215-23. [DOI: 10.1007/s00221-015-4291-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2014] [Accepted: 04/16/2015] [Indexed: 11/28/2022]
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Reyes Del Paso GA, Montoro CI, Duschek S. Reaction time, cerebral blood flow, and heart rate responses in fibromyalgia: Evidence of alterations in attentional control. J Clin Exp Neuropsychol 2015; 37:414-28. [PMID: 25825849 DOI: 10.1080/13803395.2015.1023265] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The study investigated cerebral blood flow (CBF) and heart rate (HR) responses during a cued reaction time (RT) task in patients with fibromyalgia syndrome (FMS). CBF velocities in the middle (MCA) and anterior (ACA) cerebral arteries of both hemispheres were recorded in 46 patients and 32 healthy control participants using functional transcranial Doppler sonography (fTCD). Patients exhibited markedly longer RT than healthy participants. Group differences in CBF responses were mainly observed for both ACAs, with greater right hemispherical increases but lower left hemispherical increases in FMS patients than in healthy participants. HR deceleration around the imperative stimulus was more pronounced in healthy participants. RT was inversely related to increases in CBF in both right arteries and in the left ACA in the FMS group, but was positively associated with CBF responses in all four arteries in healthy participants. The magnitude of task-induced HR deceleration correlated negatively with RT in both groups. Patients' clinical pain severity was positively associated with RT and CBF responses; trait anxiety and insomnia were secondary negative predictors of CBF responses. The study provided evidence of a deficit in the alertness component of attention in FMS at behavioral, CBF, and autonomic levels. These results may be interpreted in terms of the neural efficiency hypothesis of intelligence (i.e., less efficient brain activation during cognition in FMS) and the interfering effect of clinical factors on cognition. Clinical factors such as pain, anxiety, and sleep disturbances can affect cognition in FMS by interfering with CBF adjustment to cognitive demands.
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Boban M, Črnac P, Junaković A, Malojčić B. Hemodynamic monitoring of middle cerebral arteries during cognitive tasks performance. Psychiatry Clin Neurosci 2014; 68:795-803. [PMID: 24735174 DOI: 10.1111/pcn.12191] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2013] [Revised: 02/25/2014] [Accepted: 04/11/2014] [Indexed: 01/03/2023]
Abstract
AIM The aim of this study was to obtain temporal pattern and hemispheric dominance of blood flow velocity (BFV) changes and to assess suitability of different cognitive tasks for monitoring of BFV changes in the middle cerebral arteries (MCA). METHODS BFV were recorded simultaneously in MCA during performance of phonemic verbal fluency test (pVFT), Trail Making Tests A and B (TMTA and TMTB) and Stroop tests in 14 healthy, right-handed volunteers aged 20-26 years. RESULTS A significant increase of BFV in both MCA was obtained during performance of all cognitive tasks. Statistically significant lateralization was found during performance of Stroop test with incongruent stimuli, while TMTB was found to have the best activation potential for MCA. CONCLUSION Our findings specify TMTB as the most suitable cognitive test for monitoring of BFV in MCA.
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Affiliation(s)
- Marina Boban
- Department of Neurology, University Hospital Centre, Zagreb, Croatia; School of Medicine, University of Zagreb, Zagreb, Croatia
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An analysis of cerebral blood flow from middle cerebral arteries during cognitive tasks via functional transcranial Doppler recordings. Neurosci Res 2014; 84:19-26. [DOI: 10.1016/j.neures.2014.02.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Revised: 02/14/2014] [Accepted: 02/17/2014] [Indexed: 11/20/2022]
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Meyer GF, Spray A, Fairlie JE, Uomini NT. Inferring common cognitive mechanisms from brain blood-flow lateralization data: a new methodology for fTCD analysis. Front Psychol 2014; 5:552. [PMID: 24982641 PMCID: PMC4059176 DOI: 10.3389/fpsyg.2014.00552] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2014] [Accepted: 05/19/2014] [Indexed: 11/30/2022] Open
Abstract
Current neuroimaging techniques with high spatial resolution constrain participant motion so that many natural tasks cannot be carried out. The aim of this paper is to show how a time-locked correlation-analysis of cerebral blood flow velocity (CBFV) lateralization data, obtained with functional TransCranial Doppler (fTCD) ultrasound, can be used to infer cerebral activation patterns across tasks. In a first experiment we demonstrate that the proposed analysis method results in data that are comparable with the standard Lateralization Index (LI) for within-task comparisons of CBFV patterns, recorded during cued word generation (CWG) at two difficulty levels. In the main experiment we demonstrate that the proposed analysis method shows correlated blood-flow patterns for two different cognitive tasks that are known to draw on common brain areas, CWG, and Music Synthesis. We show that CBFV patterns for Music and CWG are correlated only for participants with prior musical training. CBFV patterns for tasks that draw on distinct brain areas, the Tower of London and CWG, are not correlated. The proposed methodology extends conventional fTCD analysis by including temporal information in the analysis of cerebral blood-flow patterns to provide a robust, non-invasive method to infer whether common brain areas are used in different cognitive tasks. It complements conventional high resolution imaging techniques.
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Affiliation(s)
- Georg F Meyer
- Department of Psychological Sciences, University of Liverpool Liverpool, UK
| | - Amy Spray
- School of Psychology, University of Liverpool Liverpool, UK
| | - Jo E Fairlie
- Department of Archaeology, Classics and Egyptology, University of Liverpool Liverpool, UK
| | - Natalie T Uomini
- Department of Archaeology, Classics and Egyptology, University of Liverpool Liverpool, UK
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Brindle RC, Ginty AT, Phillips AC, Carroll D. A tale of two mechanisms: A meta-analytic approach toward understanding the autonomic basis of cardiovascular reactivity to acute psychological stress. Psychophysiology 2014; 51:964-76. [DOI: 10.1111/psyp.12248] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Accepted: 05/05/2014] [Indexed: 12/18/2022]
Affiliation(s)
- Ryan C. Brindle
- School of Sport, Exercise, and Rehabilitation Sciences; University of Birmingham; Birmingham UK
| | - Annie T. Ginty
- School of Sport, Exercise, and Rehabilitation Sciences; University of Birmingham; Birmingham UK
| | - Anna C. Phillips
- School of Sport, Exercise, and Rehabilitation Sciences; University of Birmingham; Birmingham UK
| | - Douglas Carroll
- School of Sport, Exercise, and Rehabilitation Sciences; University of Birmingham; Birmingham UK
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de Zambotti M, Pizza F, Covassin N, Vandi S, Cellini N, Stegagno L, Plazzi G. Facing emotions in narcolepsy with cataplexy: haemodynamic and behavioural responses during emotional stimulation. J Sleep Res 2014; 23:432-40. [DOI: 10.1111/jsr.12133] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Accepted: 01/05/2014] [Indexed: 12/25/2022]
Affiliation(s)
- Massimiliano de Zambotti
- Center for Health Sciences; SRI International; Menlo Park CA USA
- Department of General Psychology; University of Padua; Padua Italy
| | - Fabio Pizza
- Department of Biomedical and Neuromotor Sciences; University of Bologna; Bologna Italy
- IRCCS Istituto delle Scienze Neurologiche; ASL di Bologna; Bologna Italy
| | - Naima Covassin
- Department of General Psychology; University of Padua; Padua Italy
| | - Stefano Vandi
- Department of Biomedical and Neuromotor Sciences; University of Bologna; Bologna Italy
- IRCCS Istituto delle Scienze Neurologiche; ASL di Bologna; Bologna Italy
| | - Nicola Cellini
- Department of General Psychology; University of Padua; Padua Italy
| | - Luciano Stegagno
- Department of General Psychology; University of Padua; Padua Italy
| | - Giuseppe Plazzi
- Department of Biomedical and Neuromotor Sciences; University of Bologna; Bologna Italy
- IRCCS Istituto delle Scienze Neurologiche; ASL di Bologna; Bologna Italy
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Mehta RK, Parasuraman R. Neuroergonomics: a review of applications to physical and cognitive work. Front Hum Neurosci 2013; 7:889. [PMID: 24391575 PMCID: PMC3870317 DOI: 10.3389/fnhum.2013.00889] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Accepted: 12/05/2013] [Indexed: 02/04/2023] Open
Abstract
Neuroergonomics is an emerging science that is defined as the study of the human brain in relation to performance at work and in everyday settings. This paper provides a critical review of the neuroergonomic approach to evaluating physical and cognitive work, particularly in mobile settings. Neuroergonomics research employing mobile and immobile brain imaging techniques are discussed in the following areas of physical and cognitive work: (1) physical work parameters; (2) physical fatigue; (3) vigilance and mental fatigue; (4) training and neuroadaptive systems; and (5) assessment of concurrent physical and cognitive work. Finally, the integration of brain and body measurements in investigating workload and fatigue, in the context of mobile brain/body imaging ("MoBI"), is discussed.
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Affiliation(s)
- Ranjana K Mehta
- Department of Environmental and Occupational Health, School of Rural Public Healthy, Texas A&M University, College Station TX, USA
| | - Raja Parasuraman
- Center of Excellence in Neuroergonomics, Technology, and Cognition, George Mason University Fairfax, VA, USA
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Huang H, Sejdić E. Assessment of resting-state blood flow through anterior cerebral arteries using trans-cranial doppler recordings. ULTRASOUND IN MEDICINE & BIOLOGY 2013; 39:2285-2294. [PMID: 24120413 DOI: 10.1016/j.ultrasmedbio.2013.06.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 04/05/2013] [Accepted: 06/28/2013] [Indexed: 06/02/2023]
Abstract
Trans-cranial Doppler (TCD) recordings are used to monitor cerebral blood flow in the main cerebral arteries. The resting state is usually characterized by the mean velocity or the maximum Doppler shift frequency (an envelope signal) by insonating the middle cerebral arteries. In this study, we characterized cerebral blood flow in the anterior cerebral arteries. We analyzed both envelope signals and raw signals obtained from bilateral insonation. We recruited 20 healthy patients and conducted the data acquisition for 15 min. Features were extracted from the time domain, the frequency domain and the time-frequency domain. The results indicate that a gender-based statistical difference exists in the frequency and time-frequency domains. However, no handedness effect was found. In the time domain, information-theoretic features indicated that mutual dependence is higher in raw signals than in envelope signals. Finally, we concluded that insonation of the anterior cerebral arteries serves as a complement to middle cerebral artery studies. Additionally, investigation of the raw signals provided us with additional information that is not otherwise available from envelope signals. Use of direct trans-cranial Doppler raw data is therefore validated as a valuable method for characterizing the resting state.
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Affiliation(s)
- Hanrui Huang
- Department of Electrical and Computer Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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