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Journal of Vision Jun 2024Infant primates see poorly, and most perceptual functions mature steadily beyond early infancy. Behavioral studies on human and macaque infants show that global form...
Infant primates see poorly, and most perceptual functions mature steadily beyond early infancy. Behavioral studies on human and macaque infants show that global form perception, as measured by the ability to integrate contour information into a coherent percept, improves dramatically throughout the first several years after birth. However, it is unknown when sensitivity to curvature and shape emerges in early life or how it develops. We studied the development of shape sensitivity in 18 macaques, aged 2 months to 10 years. Using radial frequency stimuli, circular targets whose radii are modulated sinusoidally, we tested monkeys' ability to radial frequency stimuli from circles as a function of the depth and frequency of sinusoidal modulation. We implemented a new four-choice oddity task and compared the resulting data with that from a traditional two-alternative forced choice task. We found that radial frequency pattern perception was measurable at the youngest age tested (2 months). Behavioral performance at all radial frequencies improved with age. Performance was better for higher radial frequencies, suggesting the developing visual system prioritizes processing of fine visual details that are ecologically relevant. By using two complementary methods, we were able to capture a comprehensive developmental trajectory for shape perception.
Topics: Animals; Form Perception; Photic Stimulation; Pattern Recognition, Visual; Macaca mulatta; Male; Female
PubMed: 38843389
DOI: 10.1167/jov.24.6.6 -
African Journal of Laboratory Medicine 2024The 2013-2016 West Africa Ebola outbreak highlighted the importance of laboratory capacity to outbreak response while also revealing its long-standing neglect. The...
BACKGROUND
The 2013-2016 West Africa Ebola outbreak highlighted the importance of laboratory capacity to outbreak response while also revealing its long-standing neglect. The outbreak prompted massive international investment into strengthening laboratory services across multiple healthcare settings.
OBJECTIVE
In this article, we explore hospital-based clinical laboratory workers' experiences and perceptions of their everyday working environment in Sierra Leone, and how recent investments in laboratory strengthening have shaped these.
METHODS
This qualitative study draws on in-depth interviews with eight laboratory workers and participant observation of laboratory practices at a tertiary referral hospital in Freetown between April 2019 and December 2019. Interview and observational data were coded and analysed using a reflexive thematic approach.
RESULTS
The Ebola outbreak prompted international investments in automated devices, biosafety training, and a new dedicated infectious diseases laboratory. However, little investment was made in the infrastructure and supply systems needed to sustain routine laboratory work or keep machines functioning. Laboratory workers perceived their work to be under-recognised and undervalued by the government, hospital managers and clinical staff, a perception compounded by under-use of the hospital's laboratory services by clinicians.
CONCLUSION
Understanding laboratory technicians' views, experiences, and priorities is essential to any sustainable laboratory-strengthening effort. Investments in personnel should match investments in technologies and infrastructure for outbreak response.
WHAT THIS STUDY ADDS
This study contributes to an understanding of how clinical laboratory personnel in Sierra Leone view and experience their work, and introduces the concept of social invisibility to explain these experiences.
PubMed: 38840958
DOI: 10.4102/ajlm.v13i1.2292 -
Women's Health (London, England) 2024Globally, infertility is known as a major problem which can ruin a couple's relationship. In recent years, many studies have addressed the causes of infertility, the...
BACKGROUND
Globally, infertility is known as a major problem which can ruin a couple's relationship. In recent years, many studies have addressed the causes of infertility, the outcomes of treatments for infertility, and the effects of infertility on couples' mental health; however, the concept of dignity of women living with infertility has never been examined in depth.
OBJECTIVE
This study aimed to explore the dignity of women living with infertility in Iran.
DESIGN
This qualitative research was conducted via conventional content analysis approach.
METHODS
This qualitative study was conducted in Iran from February to December 2022. In this research, the data were collected through face-to-face semi-structured in-depth interviews with 23 women living with infertility selected via purposive sampling. The interviews were continued until reaching the data saturation point. Data analysis was performed simultaneously with data collection. The interviews were recorded, transcribed, and analyzed through Graneheim and Lundman style content analysis, with data management done using the MAXQDA software. To achieve the accuracy and validity of the study, the four-dimension criteria by Lincoln and Guba, namely credibility, dependability, conformability, and transformability, were considered and used.
RESULTS
Analysis of the qualitative data yielded three themes and eight subthemes. The three main themes were (1) overcoming identity crises (overcoming dysthymia, coping with unaccomplished motherhood), (2) respect for personal identity (respect for confidentiality; respect for beliefs, values, and attitudes; avoidance of stigma and pity), and (3) compassion-focused therapy (sympathizing, mental and spiritual support, and enhancement of life skills).
CONCLUSION
Dignity of women living with infertility encompasses overcoming identity crises, respect for personal identity, and compassion therapy. The policymakers and administrators in the healthcare system can use the findings of this study to create a proper clinical environment toward preserving the dignity of women living with infertility.
Topics: Humans; Female; Iran; Qualitative Research; Adult; Infertility, Female; Respect; Personhood; Interviews as Topic; Infertility; Perception
PubMed: 38836384
DOI: 10.1177/17455057241260027 -
Frontiers in Psychology 2024Predictive processing, a crucial aspect of human cognition, is also relevant for language comprehension. In everyday situations, we exploit various sources of... (Review)
Review
Predictive processing, a crucial aspect of human cognition, is also relevant for language comprehension. In everyday situations, we exploit various sources of information to anticipate and therefore facilitate processing of upcoming linguistic input. In the literature, there are a variety of models that aim at accounting for such ability. One group of models propose a strict relationship between prediction and language production mechanisms. In this review, we first introduce very briefly the concept of predictive processing during language comprehension. Secondly, we focus on models that attribute a prominent role to language production and sensorimotor processing in language prediction ("prediction-by-production" models). Contextually, we provide a summary of studies that investigated the role of speech production and auditory perception on language comprehension/prediction tasks in healthy, typical participants. Then, we provide an overview of the limited existing literature on specific atypical/clinical populations that may represent suitable testing ground for such models-i.e., populations with impaired speech production and auditory perception mechanisms. Ultimately, we suggest a more widely and in-depth testing of prediction-by-production accounts, and the involvement of atypical populations both for model testing and as targets for possible novel speech/language treatment approaches.
PubMed: 38836235
DOI: 10.3389/fpsyg.2024.1369177 -
Proceedings of the National Academy of... Jun 2024Human pose, defined as the spatial relationships between body parts, carries instrumental information supporting the understanding of motion and action of a person. A...
Human pose, defined as the spatial relationships between body parts, carries instrumental information supporting the understanding of motion and action of a person. A substantial body of previous work has identified cortical areas responsive to images of bodies and different body parts. However, the neural basis underlying the visual perception of body part relationships has received less attention. To broaden our understanding of body perception, we analyzed high-resolution fMRI responses to a wide range of poses from over 4,000 complex natural scenes. Using ground-truth annotations and an application of three-dimensional (3D) pose reconstruction algorithms, we compared similarity patterns of cortical activity with similarity patterns built from human pose models with different levels of depth availability and viewpoint dependency. Targeting the challenge of explaining variance in complex natural image responses with interpretable models, we achieved statistically significant correlations between pose models and cortical activity patterns (though performance levels are substantially lower than the noise ceiling). We found that the 3D view-independent pose model, compared with two-dimensional models, better captures the activation from distinct cortical areas, including the right posterior superior temporal sulcus (pSTS). These areas, together with other pose-selective regions in the LOTC, form a broader, distributed cortical network with greater view-tolerance in more anterior patches. We interpret these findings in light of the computational complexity of natural body images, the wide range of visual tasks supported by pose structures, and possible shared principles for view-invariant processing between articulated objects and ordinary, rigid objects.
Topics: Humans; Magnetic Resonance Imaging; Male; Female; Adult; Brain; Brain Mapping; Visual Perception; Posture; Young Adult; Imaging, Three-Dimensional; Photic Stimulation; Algorithms
PubMed: 38830105
DOI: 10.1073/pnas.2317707121 -
BioRxiv : the Preprint Server For... May 2024Efficient behavior is supported by humans' ability to rapidly recognize acoustically distinct sounds as members of a common category. Within auditory cortex, there are...
Efficient behavior is supported by humans' ability to rapidly recognize acoustically distinct sounds as members of a common category. Within auditory cortex, there are critical unanswered questions regarding the organization and dynamics of sound categorization. Here, we performed intracerebral recordings in the context of epilepsy surgery as 20 patient-participants listened to natural sounds. We built encoding models to predict neural responses using features of these sounds extracted from different layers within a sound-categorization deep neural network (DNN). This approach yielded highly accurate models of neural responses throughout auditory cortex. The complexity of a cortical site's representation (measured by the depth of the DNN layer that produced the best model) was closely related to its anatomical location, with shallow, middle, and deep layers of the DNN associated with core (primary auditory cortex), lateral belt, and parabelt regions, respectively. Smoothly varying gradients of representational complexity also existed within these regions, with complexity increasing along a posteromedial-to-anterolateral direction in core and lateral belt, and along posterior-to-anterior and dorsal-to-ventral dimensions in parabelt. When we estimated the time window over which each recording site integrates information, we found shorter integration windows in core relative to lateral belt and parabelt. Lastly, we found a relationship between the length of the integration window and the complexity of information processing within core (but not lateral belt or parabelt). These findings suggest hierarchies of timescales and processing complexity, and their interrelationship, represent a functional organizational principle of the auditory stream that underlies our perception of complex, abstract auditory information.
PubMed: 38826304
DOI: 10.1101/2024.05.24.595822 -
Reproductive Health Jun 2024In 2006, a Constitutional Court ruling partially decriminalized abortion in Colombia, allowing the procedure in cases of rape, risk to the health or life of the woman,...
Motivations for using misoprostol for abortion outside the formal healthcare system in Colombia: a qualitative study of women seeking postabortion care in Bogotá and the Coffee Axis.
BACKGROUND
In 2006, a Constitutional Court ruling partially decriminalized abortion in Colombia, allowing the procedure in cases of rape, risk to the health or life of the woman, and fetal malformations incompatible with life. Despite this less prohibitive law, some women and pregnant people preferred self-managing their abortions outside the formal healthcare system, often without accurate information. In 2018, we undertook a study to understand what motivated women to self-manage using medications that they acquired informally. Colombia has since adopted a progressive law in 2022, permitting abortion on request through the 24th week of pregnancy. However, the implementation of this law is still underway. Examining the reasons why women chose to informally self-manage an abortion after 2006 may not only highlight how barriers to legal services persisted at that time, but also could inform strategies to increase knowledge of the current abortion law and improve access to services going forward.
METHODS
In-depth interviews were conducted in 2018 with 47 women aged 18 and older who used misoprostol obtained outside of health facilities to induce an abortion, and who were receiving postabortion care in two private clinics. Interviews explored what women knew about the 2006 abortion law which was then in effect, and the reasons why they preferred informal channels for abortion care over formal healthcare services.
RESULTS
Women's motivations to use misoprostol obtained outside the formal healthcare system were influenced by lack of trust in the healthcare system along with incomplete and inaccurate knowledge of the abortion law. Conversely, women considered misoprostol obtained outside the healthcare system to be effective, affordable, and easier to access.
CONCLUSIONS
Obtaining misoprostol outside the formal healthcare system offered a more accessible and appealing prospect for some women given fears of legal repercussion and stigma toward abortion. Though this preference will likely continue despite the more liberal abortion law, strategies should be implemented to broaden knowledge of the recent change in law and to combat misinformation and stigma. This would support knowledge of and access to legal abortion for those who wish to avail themselves of these services.
Topics: Humans; Female; Misoprostol; Adult; Colombia; Pregnancy; Abortion, Induced; Motivation; Qualitative Research; Abortifacient Agents, Nonsteroidal; Young Adult; Aftercare; Adolescent; Health Services Accessibility
PubMed: 38824533
DOI: 10.1186/s12978-024-01814-0 -
PloS One 2024Road crack detection is one of the important parts of road safety detection. Aiming at the problems such as weak segmentation effect of basic U-Net on pavement crack,...
Road crack detection is one of the important parts of road safety detection. Aiming at the problems such as weak segmentation effect of basic U-Net on pavement crack, insufficient precision of crack contour segmentation, difficult to identify narrow crack and low segmentation accuracy, this paper proposes an improved U-net network pavement crack segmentation method. VGG16 and Up_Conv (Upsampling Convolution) modules are introduced as backbone network and feature enhancement network respectively, and the more abstract features in the image are extracted by using the Block depth separable convolution blocks, and the multi-scale features are captured and enhanced by higher level semantic information to improve the recognition accuracy of narrow cracks in the road surface. The improved network embedded the Ca(Channel Attention) attention mechanism in U-net's jump connection to enhance the crack portion to suppress background noise. At the same time, DG_Conv(Depthwise GSConv Convolution) module and UnetUp(Unet Upsampling) module are added in the decoding part to extract richer features through more convolutional layers in the network, so that the model pays more attention to the detailed part of the crack, so the segmentation accuracy can be improved. In order to verify the model's ability to detect cracks in complex backgrounds, experiments were carried out on CFD and Deepcrack datasets. The experimental results show that compared with the traditional U-net network F1-score and mIoU have increased by 13.6% and 9.9% respectively. Superior to advanced models such as U-net, Segnet and Linknet in accuracy and generalization ability, the improved model provides a new method for asphalt pavement crack detection. The model is more conducive to practical application and ground deployment, and can be applied in road maintenance projects.
Topics: Hydrocarbons; Neural Networks, Computer; Algorithms; Construction Materials; Humans
PubMed: 38820536
DOI: 10.1371/journal.pone.0300679 -
PloS One 2024The prevalence of diabetes has increased globally where Type 2 Diabetes Mellitus (T2DM) is more common than any other type of diabetes. Self- care management education...
INTRODUCTION
The prevalence of diabetes has increased globally where Type 2 Diabetes Mellitus (T2DM) is more common than any other type of diabetes. Self- care management education of diabetes provides skills and information for diabetic patients to effectively perform their own self diabetic self-care for optimum glycemic index control. As T2DM is a growing health issue in Fiji, promoting diabetes self manages among patients is a need, however there is lack of evidence in this regard. Therefore, the aim of this study is to explore the perception of T2DM patients on diabetic self-care management.
METHOD
This study used a qualitative method among T2DM patients regarding diabetic self-care management in Central Division, Fiji in 2022. This study was conducted in SOPD (Special Out Patient Department) clinics in the three chosen governmental health centers in the central division of Fiji. The study sample inclusion criteria were only T2DM patients, and no other types of diabetes, patients who are 18years and above, patients who are attending clinic at least for more than 6 months, self-identified as Fijian participants of any ethnicity or gender. The study settings were also purposively selected but the study sample was selected using purposive sampling. In depth interview using semi-structured open-ended questionnaires was used to collect data. Thematic analysis was done, followed by reviewing themes, defining and naming them.
RESULTS
Thirty patients participated in this study. Five major themes emerged from the in-depth interview including; patient factors that affect diabetes self-care management, behavior and attitude towards T2DM self-care management, health services delivery, challenges and barriers faced by patients to perform diabetes self-care management, and recommendations to improve patient self-care management. Patients in this study have good knowledge about T2DM and the self-care management they have to perform. It is the patients' attitude and behavior towards T2DM self-care management that affects patients to perform self-care management. The study also showed patients have gained good knowledge from Health Care Workers (HCW). Socio-economic and psychological status also played a vital part in patients' self-care management. Apart from challenges, there were opportunities to learn the difficulties patients face in order to perform self-care management.
CONCLUSION
The results of this study revealed a combination of individual, cultural, and health systematic related factors as the mots influencer of diabetes self-management among patients in Fiji. Patients have to take ownership of their own health in order to improve their blood sugar reading and reduce complication of diabetes. Tailored interventions that consider patients' belief and address potential challenges would be useful. A lot is needed in terms of upgrading facilities for the comfort of patients and need to collaborate more with other multidisciplinary team and stakeholders.
Topics: Humans; Diabetes Mellitus, Type 2; Fiji; Male; Female; Middle Aged; Self Care; Adult; Aged; Surveys and Questionnaires; Health Knowledge, Attitudes, Practice; Perception
PubMed: 38820419
DOI: 10.1371/journal.pone.0304708 -
Heliyon May 2024HIV testing coverage among males having sex with males (MSM) and transgender women (locally known as ) is low in Bangladesh. Oral fluid-based HIV self-testing (HIVST)...
BACKGROUND
HIV testing coverage among males having sex with males (MSM) and transgender women (locally known as ) is low in Bangladesh. Oral fluid-based HIV self-testing (HIVST) may improve coverage due to its convenience and privacy but is yet to be tested in Bangladesh. Therefore, the acceptability and feasibility of supervised HIVST was examined.
METHODS
A cross-sectional study was conducted among 379 MSM and selected from five geographical regions from February-October 2020. Semi-structured questionnaire was used to examine socio-demographics, risk behaviors, and perception to acceptability and feasibility (correct completion) of HIVST. Both bivariate and multivariable logistic regression analyses were performed. Qualitative data collection encompassed in-depth interviews (N = 19), key informant interviews (N = 10), and two focus group discussions (N = 12). Line-by-line content, contextual and thematic analysis were done and triangulated to explore facilitators and challenges of HIVST among MSM and .
RESULTS
Among 379 participants, the acceptability of HIVST was 99.5 % (n = 377). Reasons for acceptability included interest in independent testing (84.3 %), peer influence (57.3 %), quicker-easier procedure (54.9 %), and painless procedure (52.5 %). Qualitative findings revealed participant's risk perceptions, empowering feelings, social stigma, complementing working hours, and convenience during COVID-19 lockdowns. Around 92 % of the participants correctly completed HIVST. In multivariable analysis, the likelihood of correct test conduction was found higher among metropolitan, younger, married, educated, and participants who felt confident during HIVST process. Qualitative findings underscored the importance of supervising the use of HIVST for first-time users. Participants, particularly the less educated groups, highlighted the video demonstration as a useful tool in the context of difficulties in reading the textual instructions. However, most participants pointed out the result interpretation as the trickiest part of HIVST. All participants demonstrated willingness for future HIVST, were interested in social media-based approaches (84 %), were willing to purchase subsidized kits, and preferred conducting future tests alone at home (83.2 %).
CONCLUSION
Oral fluid-based HIVST was an acceptable and feasible approach for MSM and in Bangladesh who were willing to do future tests independently after the supervised approach. Willingness to purchase kits and interest for social media-based approaches indicate scalability and sustainability potential of HIVST.
PubMed: 38818164
DOI: 10.1016/j.heliyon.2024.e31477