1
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Cardone D, Cerritelli F, Chiacchiaretta P, Perpetuini D, Merla A. Facial functional networks during resting state revealed by thermal infrared imaging. Phys Eng Sci Med 2023; 46:1573-1588. [PMID: 37644362 DOI: 10.1007/s13246-023-01321-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 08/11/2023] [Indexed: 08/31/2023]
Abstract
In recent decades, an increasing number of studies on psychophysiology and, in general, on clinical medicine has employed the technique of facial thermal infrared imaging (IRI), which allows to obtain information about the emotional and physical states of the subjects in a completely non-invasive and contactless fashion. Several regions of interest (ROIs) have been reported in literature as salient areas for the psychophysiological characterization of a subject (i.e. nose tip and glabella ROIs). There is however a lack of studies focusing on the functional correlation among these ROIs and about the physiological basis of the relation existing between thermal IRI and vital signals, such as the electrodermal activity, i.e. the galvanic skin response (GSR). The present study offers a new methodology able to assess the functional connection between salient seed ROIs of thermal IRI and all the pixel of the face. The same approach was also applied considering as seed signal the GSR and its phasic and tonic components. Seed correlation analysis on 63 healthy volunteers demonstrated the presence of a common pathway regulating the facial thermal functionality and the electrodermal activity. The procedure was also tested on a pathological case study, finding a completely different pattern compared to the healthy cases. The method represents a promising tool in neurology, physiology and applied neurosciences.
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Affiliation(s)
- Daniela Cardone
- Department of Engineering and Geology, University G. d'Annunzio of Chieti-Pescara, 65127, Pescara, Italy.
| | - Francesco Cerritelli
- Clinical Human-Based Department, Foundation COME Collaboarion, 65121, Pescara, Italy
| | - Piero Chiacchiaretta
- Department of Innovative Technologies in Medicine and Odontoiatry, University G. d'Annunzio of Chieti-Pescara, Chieti, Italy
| | - David Perpetuini
- Department of Engineering and Geology, University G. d'Annunzio of Chieti-Pescara, 65127, Pescara, Italy
| | - Arcangelo Merla
- Department of Engineering and Geology, University G. d'Annunzio of Chieti-Pescara, 65127, Pescara, Italy
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2
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Blum ASS, Riggins NY, Hersey DP, Atwood GS, Littenberg B. Left- vs right-sided migraine: a scoping review. J Neurol 2023; 270:2938-2949. [PMID: 36882660 DOI: 10.1007/s00415-023-11609-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/03/2023] [Accepted: 02/04/2023] [Indexed: 03/09/2023]
Abstract
BACKGROUND Migraine is a historically unilateral head pain condition, the cause of which is not currently known. A growing body of literature suggests individuals who experience migraine with left-sided headache ("left-sided migraine") may be distinguished from those who experience migraine with right-sided headache ("right-sided migraine"). OBJECTIVE In this scoping review, we explore migraine unilaterality by summarizing what is currently known about left- and right-sided migraine. METHODS Two senior medical librarians worked with the lead authors to construct and refine a set of search terms to identify studies of subjects with left- or right-sided migraine published between 1988, which is the year of publication of the first edition of the International Classification of Headache Disorders (ICHD), and December 8, 2021 (the date the searches were conducted). The following databases were searched: Medline, Embase, PsycINFO, PubMed, Cochrane Library, and Web of Science. Abstracts were loaded into Covidence review software, deduplicated, then screened by two authors to determine study eligibility. Eligible studies were those involving subjects diagnosed with migraine (according to ICHD criteria) in which the authors either: a) compared left- to right-sided migraine; or b) described (with analysis) a characteristic that differentiated the two. Data were extracted by the lead author, including ICHD version, the definition of unilateral migraine used by the authors, sample size, whether the findings were collected during or between attacks, and their key findings. The key findings were grouped into the following themes: handedness, symptoms, psychiatric assessments, cognitive testing, autonomic function, and imaging. RESULTS After deduplication, the search yielded 5428 abstracts for screening. Of these, 179 met eligibility criteria and underwent full text review. 26 articles were included in the final analysis. All of the studies were observational. One study was performed during attack, nineteen between attacks, and six both during and between attacks. Left- and right-sided migraine were found to differ across multiple domains. In several cases, reciprocal findings were reported in left- and right-migraine. For example, both left- and right-sided migraine were associated with ipsilateral handedness, tinnitus, onset of first Parkinson's symptoms, changes in blood flow across the face, white matter hyperintensities on MRI, activation of the dorsal pons, hippocampal sclerosis, and thalamic NAA/Cho and NAA/Cr concentrations. In other cases, however, the findings were specific to one migraine laterality. For example, left-sided migraine was associated with worse quality of life, anxiety, bipolar disorder, PTSD, lower sympathetic activity, and higher parasympathetic activity. Whereas right-sided migraine was associated with poorer performance on multiple cognitive tests, a greater degree of anisocoria, changes in skin temperature, higher diastolic blood pressure, changes in blood flow through the middle cerebral and basilar arteries, and changes on EEG. CONCLUSION Left- and right-sided migraine differed across a wide range of domains, raising the possibility that the pathophysiology of left- and right-migraine may not be identical.
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Affiliation(s)
- Adam S Sprouse Blum
- Department of Neurological Sciences, Larner College of Medicine, University of Vermont, Burlington, VT, USA.
| | - Nina Y Riggins
- Department of Neurological Sciences, University of California San Diego, San Diego, CA, USA
| | - Denise P Hersey
- Dana Medical Library, University of Vermont, Burlington, VT, USA
| | - Gary S Atwood
- Dana Medical Library, University of Vermont, Burlington, VT, USA
| | - Benjamin Littenberg
- Department of Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, USA
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3
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Volkov IY, Sagaidachnyi AA, Fomin AV. Photoplethysmographic Imaging of Hemodynamics and Two-Dimensional Oximetry. OPTICS AND SPECTROSCOPY 2022; 130:452-469. [PMID: 36466081 PMCID: PMC9708136 DOI: 10.1134/s0030400x22080057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 01/30/2022] [Accepted: 02/04/2022] [Indexed: 06/17/2023]
Abstract
The review of recent papers devoted to actively developing methods of photoplethysmographic imaging (the PPGI) of blood volume pulsations in vessels and non-contact two-dimensional oximetry on the surface of a human body has been carried out. The physical fundamentals and technical aspects of the PPGI and oximetry have been considered. The manifold of the physiological parameters available for the analysis by the PPGI method has been shown. The prospects of the PPGI technology have been discussed. The possibilities of non-contact determination of blood oxygen saturation SpO2 (pulse saturation O2) have been described. The relevance of remote determination of the level of oxygenation in connection with the spread of a new coronavirus infection SARS-CoV-2 (COVID-19) has been emphasized. Most of the works under consideration cover the period 2010-2021.
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Affiliation(s)
| | | | - A. V. Fomin
- Saratov State University, 410012 Saratov, Russia
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4
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Borik S, Lyra S, Perlitz V, Keller M, Leonhardt S, Blazek V. On the spatial phase distribution of cutaneous low-frequency perfusion oscillations. Sci Rep 2022; 12:5997. [PMID: 35397640 PMCID: PMC8994784 DOI: 10.1038/s41598-022-09762-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 03/24/2022] [Indexed: 11/23/2022] Open
Abstract
Distributed cutaneous tissue blood volume oscillations contain information on autonomic nervous system (ANS) regulation of cardiorespiratory activity as well as dominating thermoregulation. ANS associated with low-frequency oscillations can be quantified in terms of frequencies, amplitudes, and phase shifts. The relative order between these faculties may be disturbed by conditions colloquially termed ‘stress’. Photoplethysmography imaging, an optical non-invasive diagnostic technique provides information on cutaneous tissue perfusion in the temporal and spatial domains. Using the cold pressure test (CPT) in thirteen healthy volunteers as a well-studied experimental intervention, we present a method for evaluating phase shifts in low- and intermediate frequency bands in forehead cutaneous perfusion mapping. Phase shift changes were analysed in low- and intermediate frequency ranges from 0.05 Hz to 0.18 Hz. We observed that time waveforms increasingly desynchronised in various areas of the scanned area throughout measurements. An increase of IM band phase desynchronization observed throughout measurements was comparable in experimental and control group, suggesting a time effect possibly due to overshooting the optimal relaxation duration. CPT triggered an increase in the number of points phase-shifted to the reference that was specific to the low frequency range for phase-shift thresholds defined as π/4, 3π/8, and π/2 rad, respectively. Phase shifts in forehead blood oscillations may infer changes of vascular tone due to activity of various neural systems. We present an innovative method for the phase shift analysis of cutaneous tissue perfusion that appears promising to assess ANS change processes related to physical or psychological stress. More comprehensive studies are needed to further investigate the reliability and physiological significance of findings.
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Affiliation(s)
- Stefan Borik
- Department of Electromagnetic and Biomedical Engineering, Faculty of Electrical Engineering and Information Technology, University of Zilina, Zilina, Slovakia.
| | - Simon Lyra
- Medical Information Technology (MedIT), Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University, Aachen, Germany
| | | | - Micha Keller
- Department of Psychiatry, Psychotherapy and Psychosomatics, Medical School, RWTH Aachen University, Aachen, Germany
| | - Steffen Leonhardt
- Medical Information Technology (MedIT), Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University, Aachen, Germany
| | - Vladimir Blazek
- Medical Information Technology (MedIT), Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University, Aachen, Germany.,The Czech Institute of Informatics, Robotics and Cybernetics (CIIRC), Czech Technical University in Prague, Prague, Czech Republic
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5
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Nowaczewska M, Straburzyński M, Meder G, Kaźmierczak W. Changes in Cerebral Blood Flow after Erenumab Treatment in Good and Non-Responders-A Pilot Study of Migraine Patients. J Clin Med 2021; 10:jcm10112523. [PMID: 34200202 PMCID: PMC8201252 DOI: 10.3390/jcm10112523] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 05/06/2021] [Accepted: 06/04/2021] [Indexed: 12/17/2022] Open
Abstract
Erenumab showed efficacy in migraine prevention, however we cannot identify which patients to treat by predicting efficacy response. The aim of this study was to compare changes in cerebral blood flow (CBF) reflected by transcranial Doppler (TCD) in erenumab good responders (GR) and non-responders, in order to identify a parameter that could predict the treatment response. In this study, migraineurs treated with erenumab underwent clinical and TCD evaluations before and 6 weeks after the treatment, including data on migraine type, monthly migraine days (MMD), medication overuse headache (MOH) presence, mean blood flow velocity (Vm) and pulsatility index (PI) in cerebral arteries (CA). GR were defined as reporting ≥50% reduction in MMD. Thirty women were enrolled, of mean age 40.53 years, 20 with chronic migraine, 14 with MOH, and 19 were GR. Baseline Vm values in right CA and basilar artery (BA) were significantly lower in GR as compared with non-responders. Vm values in all arteries significantly increased after the treatment as compared with corresponding baseline values, but only in GR. A significant negative correlation was observed between baseline Vm in right CA and treatment effectiveness. Baseline Vm in right CA and basilar artery is reduced in erenumab GR as compared with non-responders. This asymmetry normalizes after the treatment with significant Vm increase in CA which may reflect CBF increase in GR only. Lower baseline Vm in right CA may predict erenumab efficacy; however, these results should be replicated in a larger cohort.
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Affiliation(s)
- Magdalena Nowaczewska
- Department of Otolaryngology, Head and Neck Surgery, and Laryngological Oncology, Ludwik, Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, M. Skłodowskiej-Curie 9, 85-090 Bydgoszcz, Poland
- Athleticomed—Pain & Sport Injury Centre with Headache & Migraine Treatment Divsion, Fordonska 144, 85-357 Bydgoszcz, Poland
- Correspondence:
| | - Marcin Straburzyński
- Headache Clinic—Terapia Neurologiczna ‘Samodzielni’, Mochnackiego 10, 02-042 Warsaw, Poland;
| | - Grzegorz Meder
- Department of Interventional Radiology, Jan Biziel University Hospital No. 2, Ujejskiego 75 Street, 85-168 Bydgoszcz, Poland;
| | - Wojciech Kaźmierczak
- Department of Sensory Organs Examination, Faculty of Health Sciences, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, M. Skłodowskiej-Curie 9, 85-090 Bydgoszcz, Poland;
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6
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Viggiano A, Ponticorvo S, Canna A, Secondulfo C, Sbordone L, Russo A, Monda M, Di Salle F, Esposito F. Vitamin C Acutely Affects Brain Perfusion and Mastication-Induced Perfusion Asymmetry in the Principal Trigeminal Nucleus. Front Syst Neurosci 2021; 15:641121. [PMID: 33716681 PMCID: PMC7953051 DOI: 10.3389/fnsys.2021.641121] [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: 12/13/2020] [Accepted: 02/03/2021] [Indexed: 11/13/2022] Open
Abstract
Prolonged mastication may induce an asymmetric modification of the local perfusion of the trigeminal principal nucleus. The aim of the present study was to evaluate the possible influence of vitamin C (vit. C) on such effect. Four groups of healthy volunteers underwent arterial spin labeling magnetic resonance imaging (ASL-MRI) to evaluate the local perfusion of the trigeminal nuclei after a vit. C-enriched lunch or a control lunch. Two ASL-MRI scans were acquired, respectively, before and after a 1 h-long masticating exercise or a 1 h long resting period. The results showed (i) an increased global perfusion of the brain in the vit. C-enriched lunch groups, (ii) an increased local perfusion of the right principal trigeminal nucleus (Vp) due to mastication, and (iii) a reduction of the rightward asymmetry of the Vp perfusion, due to mastication, after the vit C-enriched meal compared to the control meal. These results confirmed a long-lasting effect of prolonged mastication on Vp perfusion and also suggest a possible effect of vit. C on cerebral vascular tone regulation. Moreover, the data strongly draw attention on the side-to-side relation in Vp perfusion as a possible physiological parameter to be considered to understand the origin of pathological conditions like migraine.
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Affiliation(s)
- Andrea Viggiano
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, Baronissi, Italy
| | - Sara Ponticorvo
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, Baronissi, Italy
| | - Antonietta Canna
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, Baronissi, Italy
| | - Carmine Secondulfo
- University Hospital "San Giovanni di Dio e Ruggi D'Aragona", Salerno, Italy
| | - Ludovico Sbordone
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, Baronissi, Italy.,University Hospital "San Giovanni di Dio e Ruggi D'Aragona", Salerno, Italy
| | - Antonio Russo
- Department of Advanced Medical and Surgical Sciences, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Marcellino Monda
- Section of Human Physiology, Unit of Dietetic and Sport Medicine, Department of Experimental Medicine, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Francesco Di Salle
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, Baronissi, Italy.,University Hospital "San Giovanni di Dio e Ruggi D'Aragona", Salerno, Italy
| | - Fabrizio Esposito
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, Baronissi, Italy.,University Hospital "San Giovanni di Dio e Ruggi D'Aragona", Salerno, Italy.,Department of Advanced Medical and Surgical Sciences, University of Campania "Luigi Vanvitelli", Naples, Italy
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7
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Yoshida K, Nishidate I. Phase Velocity of Facial Blood Volume Oscillation at a Frequency of 0.1 Hz. Front Physiol 2021; 12:627354. [PMID: 33584350 PMCID: PMC7876320 DOI: 10.3389/fphys.2021.627354] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 01/04/2021] [Indexed: 11/13/2022] Open
Abstract
Facial blood flow, which typically exhibits distinctive oscillation at a frequency of around 0.1 Hz, has been extensively studied. Although this oscillation may include important information about blood flow regulation, its origin remains unknown. The spatial phase distribution of the oscillation is thus desirable. Therefore, we visualized facial blood volume oscillation at a frequency of around 0.1 Hz using a digital camera imaging method with an improved approximation equation, which enabled precise analysis over a large area. We observed a slow spatial movement of the 0.1-Hz oscillation. The oscillation phase was not synchronized, but instead moved slowly. The phase velocity varies with person, measurement location, and time. An average phase velocity of 3.8 mm/s was obtained for several subjects. The results are consistent with previous studies; however, the conventional explanation that the blood flow at a certain point oscillates independently of adjacent areas should be corrected. If the primary origin of the movement is myogenic activity, the movement may ascend along a blood vessel toward the upstream. Otherwise, the oscillation and its propagation can be considered to be related to Mayer waves. By determining the mechanism, some questions regarding Mayer waves can be answered. The direction of the wave (upstream or downstream) provides important information.
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Affiliation(s)
| | - Izumi Nishidate
- Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Tokyo, Japan
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8
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Luo J, Zhen J, Zhou P, Chen W, Guo Y. An iPPG-Based Device for Pervasive Monitoring of Multi-Dimensional Cardiovascular Hemodynamics. SENSORS 2021; 21:s21030872. [PMID: 33525472 PMCID: PMC7865369 DOI: 10.3390/s21030872] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/18/2020] [Accepted: 12/22/2020] [Indexed: 11/16/2022]
Abstract
Hemodynamic activities, as an essential measure of physiological and psychological characteristics, can be used for cardiovascular and cerebrovascular disease detection. Photoplethysmography imaging (iPPG) can be applied for such purposes with non-contact advances, however, most cardiovascular hemodynamics of iPPG systems are developed for laboratory research, which limits the application in pervasive healthcare. In this study, a video-based facial iPPG detecting equipment was devised to provide multi-dimensional spatiotemporal hemodynamic pulsations for applications with high portability and self-monitoring requirements. A series of algorithms have also been developed for physiological indices such as heart rate and breath rate extraction, facial region analysis, and visualization of hemodynamic pulsation distribution. Results showed that the new device can provide a reliable measurement of a rich range of cardiovascular hemodynamics. Combined with the advanced computing techniques, the new non-contact iPPG system provides a promising solution for user-friendly pervasive healthcare.
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Affiliation(s)
- Jingjing Luo
- Institute of AI and Robotics, Academy for Engineering and Technology, Fudan University, Shanghai 200433, China;
- Jihua Laboratory, Guangdong 528000, China;
| | - Junjie Zhen
- School of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China;
| | - Peng Zhou
- Jihua Laboratory, Guangdong 528000, China;
- School of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China;
| | - Wei Chen
- Center for Intelligent Medical Electronics, School of Information Science and Technology, Fudan University, Shanghai 200433, China;
- Human Phenome Institute, Fudan University, Shanghai 200433, China
| | - Yuzhu Guo
- School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China
- Correspondence:
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9
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Migrainous facial palsy (MFP): the introduction of a new concept of neurovascular conflict and its preliminary clinical evidence. Neurol Sci 2020; 41:2547-2552. [DOI: 10.1007/s10072-020-04370-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 03/21/2020] [Indexed: 10/24/2022]
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10
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Mamontov OV, Krasnikova TV, Volynsky MA, Anokhina NA, Shlyakhto EV, Kamshilin AA. Novel instrumental markers of proximal scleroderma provided by imaging photoplethysmography. Physiol Meas 2020; 41:044004. [DOI: 10.1088/1361-6579/ab807c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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11
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Cortez MM, Theriot JJ, Rea NA, Gowen FE, Brennan KC. Low-frequency facial hemodynamic oscillations distinguish migraineurs from non-headache controls. CEPHALALGIA REPORTS 2019; 2. [PMID: 34046553 DOI: 10.1177/2515816319888216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Background Surface imaging is a promising, noninvasive approach to assess regional perfusion in craniovascular disorders such as migraine. Methods We used optical imaging to examine differences in facial blood volume at baseline and in response to ammonia inhalation (a noxious stimulus), as well as standardized measures of cardiovascular autonomic function, in healthy, non-headache controls (n = 43) and in interictal migraine subjects (n = 22). Results Resting facial cutaneous oscillation (FCO) frequency was significantly different in migraine compared to healthy controls. Following ammonia inhalation, healthy controls showed a significant increase in resting FCO frequency, whereas this response was not significant in the migraine group. Standardized autonomic reflex parameters did not differ significantly between study groups, and facial cutaneous activity did not correlate with standardized cardiovascular autonomic reflex parameters, suggesting potentially different regulation. Conclusions This approach to the assessment of craniofacial hemodynamic function appears to exhibit differing mechanisms from previously available techniques, and represents a promising new physiological biomarker for the study of craniofacial vascular function in migraine and potentially other craniovascular disorders.
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Affiliation(s)
- Melissa M Cortez
- Department of Neurology, University of Utah, Salt Lake City, UT, USA
| | - Jeremy J Theriot
- Department of Neurology, University of Utah, Salt Lake City, UT, USA
| | - Natalie A Rea
- School of Medicine, University of Utah, Salt Lake City, UT, USA
| | - Forrest E Gowen
- School of Medicine, University of Nevada, Reno, NV, USA.,School of Chiropractic Medicine, University of Western States, Portland, OR, USA
| | - K C Brennan
- Department of Neurology, University of Utah, Salt Lake City, UT, USA
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12
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Remote Monitoring of Vital Signs in Diverse Non-Clinical and Clinical Scenarios Using Computer Vision Systems: A Review. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9204474] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Techniques for noncontact measurement of vital signs using camera imaging technologies have been attracting increasing attention. For noncontact physiological assessments, computer vision-based methods appear to be an advantageous approach that could be robust, hygienic, reliable, safe, cost effective and suitable for long distance and long-term monitoring. In addition, video techniques allow measurements from multiple individuals opportunistically and simultaneously in groups. This paper aims to explore the progress of the technology from controlled clinical scenarios with fixed monitoring installations and controlled lighting, towards uncontrolled environments, crowds and moving sensor platforms. We focus on the diversity of applications and scenarios being studied in this topic. From this review it emerges that automatic multiple regions of interest (ROIs) selection, removal of noise artefacts caused by both illumination variations and motion artefacts, simultaneous multiple person monitoring, long distance detection, multi-camera fusion and accepted publicly available datasets are topics that still require research to enable the technology to mature into many real-world applications.
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13
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Zaunseder S, Trumpp A, Wedekind D, Malberg H. Cardiovascular assessment by imaging photoplethysmography - a review. ACTA ACUST UNITED AC 2019; 63:617-634. [PMID: 29897880 DOI: 10.1515/bmt-2017-0119] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 05/04/2018] [Indexed: 12/12/2022]
Abstract
Over the last few years, the contactless acquisition of cardiovascular parameters using cameras has gained immense attention. The technique provides an optical means to acquire cardiovascular information in a very convenient way. This review provides an overview on the technique's background and current realizations. Besides giving detailed information on the most widespread application of the technique, namely the contactless acquisition of heart rate, we outline further concepts and we critically discuss the current state.
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Affiliation(s)
- Sebastian Zaunseder
- TU Dresden, Institute of Biomedical Engineering, Helmholtzstraße 18, Dresden, 01069 Saxony, Germany
| | - Alexander Trumpp
- TU Dresden, Institute of Biomedical Engineering, Helmholtzstraße 18, Dresden, 01069 Saxony, Germany
| | - Daniel Wedekind
- TU Dresden, Institute of Biomedical Engineering, Helmholtzstraße 18, Dresden, 01069 Saxony, Germany
| | - Hagen Malberg
- TU Dresden, Institute of Biomedical Engineering, Helmholtzstraße 18, Dresden, 01069 Saxony, Germany
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14
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Wienholtz N, Christensen CE, Egeberg A, Thyssen JP, Ashina M. Vasomotor reactions in the face and head of patients with migraine. CEPHALALGIA REPORTS 2018. [DOI: 10.1177/2515816318790543] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Objective: To systematically review extracranial vasomotor reactions in patients with migraine, and to discuss potential overlaps with rosacea. Background: Autonomic manifestations are common in migraine and may reflect trigeminovascular system activation. Flushing during migraine attacks may indicate altered extracranial vasomotor reactivity which resembles that of the facial skin disorder rosacea. Methods: PubMed and EMBASE were searched for studies investigating extracranial vascular reactions in migraine and rosacea published until January 2018. Results: We uncovered 41 studies investigating extracranial circulation in migraine and 12 studies in rosacea. Skin temperature was generally lower on the forehead, nose and hands of migraine patients compared to controls. The superficial temporal artery (STA) showed greater amplitude variations in migraine patients compared to controls, and compression of either the STA or the common carotid artery during attacks led to transient pain relief in about one-third of the investigated patients. Facial skin blood flow was asymmetrical in migraine patients compared to healthy volunteers. Conclusion: Findings on extracranial microcirculation suggest an altered function of the autonomic nervous system in migraine patients. Similar signs of autonomic nervous system dysfunction are reported in rosacea. We suggest an overlap in autonomic and neurovascular pathophysiology in migraine and rosacea.
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Affiliation(s)
- Nita Wienholtz
- Danish Headache Center and Department of Neurology, Rigshospitalet Glostrup, Faculty of Health and Medical Sciences, University of Copenhagen, Glostrup, Denmark
| | - Casper Emil Christensen
- Danish Headache Center and Department of Neurology, Rigshospitalet Glostrup, Faculty of Health and Medical Sciences, University of Copenhagen, Glostrup, Denmark
| | - Alexander Egeberg
- Department of Dermatology and Allergy, Herlev and Gentofte Hospitals, University of Copenhagen, Denmark
| | - Jacob P Thyssen
- Department of Dermatology and Allergy, Herlev and Gentofte Hospitals, University of Copenhagen, Denmark
| | - Messoud Ashina
- Danish Headache Center and Department of Neurology, Rigshospitalet Glostrup, Faculty of Health and Medical Sciences, University of Copenhagen, Glostrup, Denmark
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15
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Kamshilin AA, Volynsky MA, Khayrutdinova O, Nurkhametova D, Babayan L, Amelin AV, Mamontov OV, Giniatullin R. Novel capsaicin-induced parameters of microcirculation in migraine patients revealed by imaging photoplethysmography. J Headache Pain 2018; 19:43. [PMID: 29915934 PMCID: PMC6005996 DOI: 10.1186/s10194-018-0872-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 06/13/2018] [Indexed: 01/03/2023] Open
Abstract
Background The non-invasive biomarkers of migraine can help to develop the personalized medication of this disorder. In testing of the antimigraine drugs the capsaicin-induced skin redness with activated TRPV1 receptors in sensory neurons associated with the release of the migraine mediator CGRP has already been widely used. Methods Fourteen migraine patients (mean age 34.6 ± 10.2 years) and 14 healthy volunteers (mean age 29.9 ± 9.7 years) participated in the experiment. A new arrangement of imaging photoplethysmography recently developed by us was used here to discover novel sensitive parameters of dermal blood flow during capsaicin applications in migraine patients. Results Blood pulsation amplitude (BPA) observed as optical-intensity waveform varying synchronously with heartbeat was used for detailed exploration of microcirculatory perfusion induced by capsicum patch application. The BPA signals, once having appeared after certain latent period, were progressively rising until being saturated. Capsaicin-induced high BPA areas were distributed unevenly under the patch, forming “hot spots.” Interestingly the hot spots were much more variable in migraine patients than in the control group. In contrast to BPA, a slow component of waveforms related to the skin redness changed significantly less than BPA highlighting the latter parameter as the potential sensitive biomarker of capsaicin-induced activation of the blood flow. Thus, in migraine patients, there is a non-uniform (both in space and in time) reaction to capsaicin, resulting in highly variable openings of skin capillaries. Conclusion BPA dynamics measured by imaging photoplethysmography could serve as a novel sensitive non-invasive biomarker of migraine-associated changes in microcirculation.
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Affiliation(s)
- Alexei A Kamshilin
- Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg, Russia.
| | - Maxim A Volynsky
- Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg, Russia
| | - Olga Khayrutdinova
- Department of Neurology and Rehabilitation, Kazan State Medical University, Kazan, Russia
| | - Dilyara Nurkhametova
- Laboratory of Neurobiology, Kazan Federal University, Kazan, Russia.,Department of Neurobiology, University of Eastern Finland, Kuopio, Finland
| | - Laura Babayan
- Department of Neurology and Neurosurgery, Pavlov First Saint Petersburg State Medical University, St. Petersburg, Russia
| | - Alexander V Amelin
- Department of Neurology and Neurosurgery, Pavlov First Saint Petersburg State Medical University, St. Petersburg, Russia
| | - Oleg V Mamontov
- Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg, Russia.,Department of Circulation Physiology, Almazov National Medical Research Centre, St. Petersburg, Russia
| | - Rashid Giniatullin
- Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg, Russia.,Laboratory of Neurobiology, Kazan Federal University, Kazan, Russia.,Department of Neurobiology, University of Eastern Finland, Kuopio, Finland
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16
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Trumpp A, Bauer PL, Rasche S, Malberg H, Zaunseder S. The value of polarization in camera-based photoplethysmography. BIOMEDICAL OPTICS EXPRESS 2017; 8:2822-2834. [PMID: 28663909 PMCID: PMC5480432 DOI: 10.1364/boe.8.002822] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 03/30/2017] [Accepted: 04/02/2017] [Indexed: 05/22/2023]
Abstract
Camera-based photoplethysmography (cbPPG) is a novel measuring technique that permits the remote acquisition of cardiovascular signals using video cameras. Research still lacks in fundamental studies to reach a deeper technical and physiological understanding. This work analyzes the employment of polarization filtration to (i) assess the gain for the signal quality and (ii) draw conclusions about the cbPPG signal's origin. We evaluated various forehead regions of 18 recordings with different color and filter settings. Our results prove that for an optimal illumination, the perpendicular filter setting provides a significant benefit. The outcome supports the theory that signals arise from blood volume changes. For lateral illumination, ballistocardiographic effects dominate the signal as polarization's impact vanishes.
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Affiliation(s)
- Alexander Trumpp
- Institute of Biomedical Engineering, Faculty of Electrical and Computer Engineering, Technische Universität Dresden, 01062 Dresden,
Germany
| | - Philipp L. Bauer
- Institute of Biomedical Engineering, Faculty of Electrical and Computer Engineering, Technische Universität Dresden, 01062 Dresden,
Germany
| | - Stefan Rasche
- Herzzentrum Dresden, Department of Cardiac Surgery, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, 01062 Dresden,
Germany
| | - Hagen Malberg
- Institute of Biomedical Engineering, Faculty of Electrical and Computer Engineering, Technische Universität Dresden, 01062 Dresden,
Germany
| | - Sebastian Zaunseder
- Institute of Biomedical Engineering, Faculty of Electrical and Computer Engineering, Technische Universität Dresden, 01062 Dresden,
Germany
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17
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Mikhailov N, V. Mamontov O, A. Kamshilin A, Giniatullin R. Parasympathetic Cholinergic and Neuropeptide Mechanisms of Migraine. Anesth Pain Med 2016; 7:e42210. [PMID: 28920040 PMCID: PMC5554415 DOI: 10.5812/aapm.42210] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 10/19/2016] [Accepted: 11/21/2016] [Indexed: 12/24/2022] Open
Abstract
Context Migraine mechanisms remain largely uncovered for various reasons including a very high complexity of the neurophysiological mechanisms implicated in this disorder and a plethora of endogenous biologically active compounds involved in the pathological process. The functional role of parasympathetic innervation of meninges and cholinergic mechanisms of migraine are among little explored issues despite multiple evidence indirectly indicating the role of acetylcholine (ACh) and its analogues in migraine and other types of headache. In the current short review, we discuss morphological, functional, and clinical issues related to the role of ACh and its analogues such as carbachol and nicotine in this most common neurological disorder. Evidence Acquisition In the present work, studies published from 1953 to 2016 were investigated. Literature was searched with following keywords: acetylcholine (ACh), carbachol, nicotine, parasympathetic, mast cells, vasoactive intestinal polypeptide (VIP), and pituitary adenylate cyclase-activating polypeptide (PACAP). Results Parasympathetic fibers originated from SPG and trigeminal nerves can interact at the level of meninges which is considered to be the origin site of migraine pain. Here, in dura mater, ACh, VIP, and PACAP released by parasympathetic afferents can both affect mast cells provoking its degranulation and additional release of neurotransmitters, or they can directly affect trigeminal nerves inducing nociception. Conclusions In summary, cholinergic mechanisms in migraine and other types of headache remain little elucidated and future studies should clarify the role of parasympathetic nerves and molecular mechanisms of cholinergic modulation within the nociceptive system.
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Affiliation(s)
- Nikita Mikhailov
- Department of Neurobiology, University of Eastern Finland, 70210 Kuopio, Finland
| | - Oleg V. Mamontov
- Department of Circulation Physiology, Federal Almazov North-West Medical Research Centre, St. Petersburg, 197341, Russia
- Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg, 197101, Russia
| | - Alexei A. Kamshilin
- Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg, 197101, Russia
- Corresponding author: Alexei A. Kamshilin, Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg, 197101, Russia, E-mail:
| | - Rashid Giniatullin
- Department of Neurobiology, University of Eastern Finland, 70210 Kuopio, Finland
- Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg, 197101, Russia
- Laboratory of Neurobiology, Kazan Federal University, Kazan, Russia
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18
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Kamshilin AA, Sidorov IS, Babayan L, Volynsky MA, Giniatullin R, Mamontov OV. Accurate measurement of the pulse wave delay with imaging photoplethysmography. BIOMEDICAL OPTICS EXPRESS 2016; 7:5138-5147. [PMID: 28018731 PMCID: PMC5175558 DOI: 10.1364/boe.7.005138] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 10/22/2016] [Accepted: 10/31/2016] [Indexed: 05/30/2023]
Abstract
Assessment of the cardiovascular parameters using noncontact video-based or imaging photoplethysmography (IPPG) is usually considered as inaccurate because of strong influence of motion artefacts. To optimize this technique we performed a simultaneous recording of electrocardiogram and video frames of the face for 36 healthy volunteers. We found that signal disturbances originate mainly from the stochastically enhanced dichroic notch caused by endogenous cardiovascular mechanisms, with smaller contribution of the motion artefacts. Our properly designed algorithm allowed us to increase accuracy of the pulse-transit-time measurement and visualize propagation of the pulse wave in the facial region. Thus, the accurate measurement of the pulse wave parameters with this technique suggests a sensitive approach to assess local regulation of microcirculation in various physiological and pathological states.
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Affiliation(s)
- Alexei A. Kamshilin
- Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg 197101, Russia
| | - Igor S. Sidorov
- Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg 197101, Russia
| | - Laura Babayan
- Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg 197101, Russia
- Department of Neurology and Neurosurgery, Pavlov First Saint Petersburg State Medical University, St. Petersburg 197022, Russia
| | - Maxim A. Volynsky
- Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg 197101, Russia
| | - Rashid Giniatullin
- Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg 197101, Russia
- Department of Neurobiology, University of Eastern Finland, 70210 Kuopio, Finland
- Laboratory of Neurobiology, Kazan Federal University, Kazan 7208, Russia
| | - Oleg V. Mamontov
- Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg 197101, Russia
- Department of Circulation Physiology, Federal Almazov North-West Medical Research Centre, St. Petersburg 197341, Russia
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19
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Moço AV, Stuijk S, de Haan G. Skin inhomogeneity as a source of error in remote PPG-imaging. BIOMEDICAL OPTICS EXPRESS 2016; 7:4718-4733. [PMID: 27896011 PMCID: PMC5119611 DOI: 10.1364/boe.7.004718] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 09/15/2016] [Accepted: 09/26/2016] [Indexed: 05/30/2023]
Abstract
Remote photoplethysmography (rPPG) imaging is an optical technique to remotely assess the local cutaneous microcirculation. Despite its potential for enabling health-related applications, the current understanding of the outcome images/maps remains incomplete. In this paper, we present a model and supporting experiments confirming the contribution of skin inhomogeneity to the morphology of PPG waveforms. Since rPPG imagers rely on the complex inner-product operator and may combine multiple wavelengths, the derived phase measurements reflect morphological heterogeneity of PPG signals to a larger extent than propagation-related phase differences. The influence of light penetration depth on PPG was observed and modeled on the green and red wavelengths at the hand region. We further show how our work contributes to understanding reproducibility issues in recent papers on pulse wave velocity (PWV) estimation.
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Affiliation(s)
- Andreia Vieira Moço
- Electronic Systems Group, Eindhoven University of Technology, Eindhoven, The
Netherlands
| | - Sander Stuijk
- Electronic Systems Group, Eindhoven University of Technology, Eindhoven, The
Netherlands
| | - Gerard de Haan
- Philips Innovation Group, Philips Research, Eindhoven, The
Netherlands
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20
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Origin of Infrared Light Modulation in Reflectance-Mode Photoplethysmography. PLoS One 2016; 11:e0165413. [PMID: 27768753 PMCID: PMC5074491 DOI: 10.1371/journal.pone.0165413] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 10/11/2016] [Indexed: 12/26/2022] Open
Abstract
We recently pointed out the important role of dermis deformation by pulsating arterial pressure in the formation of a photoplethysmographic signal at green light. The aim of this study was to explore the role of this novel finding in near-infrared (NIR) light. A light-emitting diode (LED)-based imaging photoplethysmography (IPPG) system was used to detect spatial distribution of blood pulsations under frame-to-frame switching green and NIR illumination in the palms of 34 healthy individuals. We observed a significant increase of light-intensity modulation at the heartbeat frequency for both illuminating wavelengths after a palm was contacted with a glass plate. Strong positive correlation between data measured at green and NIR light was found, suggesting that the same signal was read independently from the depth of penetration. Analysis of the data shows that an essential part of remitted NIR light is modulated in time as a result of elastic deformations of dermis caused by variable blood pressure in the arteries. Our observations suggest that in contrast with the classical model, photoplethysmographic waveform originates from the modulation of the density of capillaries caused by the variable pressure applied to the skin from large blood vessels. Particularly, beat-to-beat transmural pressure in arteries compresses/decompresses the dermis and deforms its connective-tissue components, thus affecting the distance between the capillaries, which results in the modulation of absorption and scattering coefficients of both green and NIR light. These findings are important for the correct interpretation of this widely used medical technique, which may have novel applications in diagnosis and treatment monitoring of aging and skin diseases.
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21
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Mamontov OV, Babayan L, Amelin AV, Giniatullin R, Kamshilin AA. Autonomous control of cardiovascular reactivity in patients with episodic and chronic forms of migraine. J Headache Pain 2016; 17:52. [PMID: 27167136 PMCID: PMC4864743 DOI: 10.1186/s10194-016-0645-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Accepted: 05/07/2016] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND The autonomous cardiovascular control can contribute to progression of migraine. However, current data on cardiovascular reactivity in migraine, especially severe forms, are essentially contradictory. The main aim of this study was to compare the autonomous regulation of circulation in patients with episodic and chronic migraine and healthy subjects. METHODS Seventy three migraine patients (mean age 35 ± 10) including episodic migraine (51 patients, 4-14 headache days/months) and chronic migraine (22 patients, ≥15 headache days/month) along with age-match control (71 healthy voluntaries) were examined. The autonomic regulation of circulation was examined with the tilt-table test, a deep breathing and Valsalva Maneuver, handgrip test, cold-stress vasoconstriction, arterial baroreflex and blood pressure variability. RESULTS The changes in heart rate induced by deep breathing, Valsalva Maneuver, and blood pressure in tilt-table test in patients with migraine did not differ from the control group. In contrast, the values of cold-stress-vasoconstriction forearm blood-flow reactivity (p <0.001), the increase in diastolic blood pressure in handgrip test (p <0.001), mean blood pressure in the late stage of the second phase of Valsalva Maneuver (p <0.001) and blood pressure variability (p <0.005) were all higher in patients with migraine than in the control group. CONCLUSION Thus, both episodic and chronic migraine are associated with significant disturbances in autonomous control resulting in enhanced vascular reactivity whereas the cardiac regulation remains largely unchanged.
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Affiliation(s)
- Oleg V Mamontov
- Almazov Federal Heart, Blood and Endocrinology Centre, St. Petersburg, Russia.,Pavlov First Saint Petersburg State Medical University, St. Petersburg, Russia.,Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg, Russia
| | - Laura Babayan
- Pavlov First Saint Petersburg State Medical University, St. Petersburg, Russia.,Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg, Russia
| | - Alexander V Amelin
- Pavlov First Saint Petersburg State Medical University, St. Petersburg, Russia.,Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg, Russia
| | - Rashid Giniatullin
- Department of Neurobiology, University of Eastern Finland, Kuopio, Finland.,Kazan Federal University, Kazan, Russia.,Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg, Russia
| | - Alexei A Kamshilin
- Department of Computer Photonics and Videomatics, ITMO University, St. Petersburg, Russia.
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22
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Moço AV, Stuijk S, de Haan G. Motion robust PPG-imaging through color channel mapping. BIOMEDICAL OPTICS EXPRESS 2016; 7:1737-54. [PMID: 27231618 PMCID: PMC4871078 DOI: 10.1364/boe.7.001737] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 03/14/2016] [Accepted: 03/16/2016] [Indexed: 05/18/2023]
Abstract
Photoplethysmography (PPG)-imaging is an emerging noninvasive technique that maps spatial blood-volume variations in living tissue with a video camera. In this paper, we clarify how cardiac-related (i.e., ballistocardiographic; BCG) artifacts occur in this imaging modality and address these using algorithms from the remote-PPG literature. Performance is assessed under stationary conditions at the immobilized hand. Our proposal outperforms the state-of-the-art, blood pulsation imaging [Biomed. Opt. Express5, 3123 (2014). ], even in our best attempt to create diffused illumination. BCG-artifacts are suppressed to an order of magnitude below PPG-signal strength, which is sufficient to prevent interpretation errors.
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Affiliation(s)
- Andreia V. Moço
- Electronic Systems Group, Eindhoven University of Technology, Eindhoven,
The Netherlands
| | - Sander Stuijk
- Electronic Systems Group, Eindhoven University of Technology, Eindhoven,
The Netherlands
| | - Gerard de Haan
- Philips Innovation Group, Philips Research, Eindhoven,
The Netherlands
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23
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Teplov V, Nippolainen E, Makarenko AA, Giniatullin R, Kamshilin AA. Ambiguity of mapping the relative phase of blood pulsations. BIOMEDICAL OPTICS EXPRESS 2014; 5:3123-39. [PMID: 25401026 PMCID: PMC4230858 DOI: 10.1364/boe.5.003123] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 08/13/2014] [Accepted: 08/20/2014] [Indexed: 05/22/2023]
Abstract
Blood pulsation imaging (BPI) is a non-invasive optical method based on photoplethysmography (PPG). It is used for the visualization of changes in the spatial distribution of blood in the microvascular bed. BPI specifically allows measurements of the relative phase of blood pulsations and using it we detected a novel type of PPG fast waveforms, which were observable in limited areas with asynchronous regional blood supply. In all subjects studied, these fast waveforms coexisted with traditional slow waveforms of PPG. We are therefore presenting a novel lock-in image processing technique of blood pulsation imaging, which can be used for detailed temporal characterization of peripheral microcirculation.
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Affiliation(s)
- Victor Teplov
- Department of Applied Physics, University of Eastern Finland, P.O. Box 1627, 70210 Kuopio, Finland
| | - Ervin Nippolainen
- Department of Applied Physics, University of Eastern Finland, P.O. Box 1627, 70210 Kuopio, Finland
| | - Alexander A. Makarenko
- University of Information Technology, Mechanics, and Optics, 197101 Saint Petersburg, Russia
| | - Rashid Giniatullin
- Department of Neurobiology, University of Eastern Finland, 70210 Kuopio, Finland
- Lab of Neurobiology, Kazan Federal University, 420008 Kazan, Russia
| | - Alexei A. Kamshilin
- Department of Applied Physics, University of Eastern Finland, P.O. Box 1627, 70210 Kuopio, Finland
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