JoVE Visualize What is visualize?
Stop Reading. Start Watching.
Advanced Search
Stop Reading. Start Watching.
Regular Search
Find video protocols related to scientific articles indexed in Pubmed.
Deafness in patients with multiple sclerosis.
Audiol. Neurootol.
PUBLISHED: 08-20-2014
Show Abstract
Hide Abstract
Multiple sclerosis (MS) is a demyelinating disease and is considered the most debilitating neurological disorder among young adults. Sudden deafness has been reported in MS patients. This article describes cases of sudden deafness related to acute bouts in MS patients. A survey was conducted using 405 records of MS patients attended to at a reference center in the city of Rio de Janeiro between 2011 and 2012 to identify cases of sudden deafness. Seven patients were identified, 6 with a relapsing-remitting course and 1 with progressive disease at onset. Five patients had unilateral deafness and 2 bilateral. The recovery was complete in 4 and partial in 1, and there was no recovery in 2 patients. It was not possible to establish a topographical correlation between deafness and brainstem lesions. Audiometric examinations revealed severe hearing loss during the bout and recovery of hearing in 5 cases after remission. © 2014 S. Karger AG, Basel.
Related JoVE Video
[CT scanners in the Brazilian Unified National Health System: installed capacity and utilization].
Cad Saude Publica
PUBLISHED: 08-08-2014
Show Abstract
Hide Abstract
This study analyzes the supply and use of computed tomography scanners (CT) in the Brazilian Unified National Health System (SUS) according to State and administrative levels in the year 2009. Secondary data were used to estimate the installed CT capacity in public healthcare facilities and in private services outsourced by the SUS and calculated the rate of utilization. Average national CT utilization was less than 10%. The public sector showed lower CT use than the private sector outsourced by the SUS. The number of CT tests in the SUS was less than half the number produced in developed countries. The results thus suggest the need for further studies on management practices with high-technology equipment in order to improve allocation of current and future public resources in supplying CT tests.
Related JoVE Video
Reducing Child Mortality: The Contribution of Ceará State, Northeast of Brazil, on Achieving the Millennium Development Goal 4 in Brazil.
Matern Child Health J
PUBLISHED: 08-07-2014
Show Abstract
Hide Abstract
To describe the experience of Ceará, Northeast of Brazil, state on improving child survival, over a 20 year period, and discuss its contribution to Brazil's progress toward the achievement of MDG 4. Five population-based, statewide household surveys, with children <3 years of age, known as PESMIC (Mother and Child Health Survey of Ceará), were conducted in 1987, 1990, 1994, 2001 and 2007. They aimed to investigate levels and causes of mortality and access to child health services. The cluster sampling of 8,000 households identified 2,000 children on average. They used the same methodological approach and indicators. Important changes occurred in demographic and health indicators in the 20 year period, including 81 % reduction in the infant mortality rate, 43 % increase in breastfeeding rate and the achievement of a 95 % immunization rate. The prevalence of chronic malnutrition declined from 28 to 13 % and acute malnutrition from 13 to 5 %. Diarrheal diseases contributed with 36.6 % to the infant mortality in 1986 and 3.9 % in 2007. The major improvements in child health contributed substantially to the progress on MDG 4 in Brazil. Results of the 5 surveys produced reliable information for planning and evaluation that contributed to the remarkable progress made by the state.
Related JoVE Video
Brain activation of the defensive and appetitive survival systems in obsessive compulsive disorder.
Brain Imaging Behav
PUBLISHED: 04-25-2014
Show Abstract
Hide Abstract
Several studies have shown that basic emotions are responsible for a significant enhancement of early visual processes and increased activation in visual processing brain regions. It may be possible that the cognitive uncertainty and repeated behavioral checking evident in Obsessive Compulsive Disorder (OCD) is due to the existence of abnormalities in basic survival circuits, particularly those associated with the visual processing of the physical characteristics of emotional-laden stimuli. The objective of the present study was to test if patients with OCD show evidence of altered basic survival circuits, particularly those associated with the visual processing of the physical characteristics of emotional stimuli. Fifteen patients with OCD and 12 healthy controls underwent functional magnetic resonance imaging acquisition while being exposed to emotional pictures, with different levels of arousal, intended to trigger the defensive and appetitive basic survival circuits. Overall, the present results seem to indicate dissociation in the activity of the defense and appetitive survival systems in OCD. Results suggest that the clinical group reacts to basic threat with a strong activation of the defensive system mobilizing widespread brain networks (i.e., frontal, temporal, occipital-parietal, and subcortical nucleus) and blocking the activation of the appetitive system when facing positive emotional triggers from the initial stages of visual processing (i.e., superior occipital gyrus).
Related JoVE Video
[Factors associated with neonatal death in high-risk infants: a multicenter study in High-Risk Neonatal Units in Northeast Brazil].
Cad Saude Publica
PUBLISHED: 03-15-2014
Show Abstract
Hide Abstract
This study aimed to identify factors associated with in-hospital mortality in High-Risk Neonatal Units (NICU) belonging to the North-Northeast Perinatal Health Network in Northeast Brazil. The explanatory variables were individual maternal characteristics, prenatal care, childbirth and neonatal care, and infant characteristics. This was a longitudinal, multicenter hospital-based study. The study population consisted of 3,623 live born infants admitted to 34 NICUs. After adjusting for the three hierarchical levels in the model for determination of death in the NICU up to the 27 th day of life, the following showed statistically significant association: type of delivery - cesarean section (OR = 0.72; 95%CI: 0.56-0.95), non-use of prenatal steroids (OR =1.51; 95%CI: 1.01-2.25), preeclampsia (OR = 0.73; 95%CI: 0.56-0.95), oligohydramnios (OR = 1.57; 95%CI: 1, 17-2.10), birth weight < 2500g (OR = 1.40; 95%CI: 1.03-1.90), 5-minute Apgar score < 7 (OR = 2.63; 95%CI: 2.21-3.14), endotracheal intubation (OR = 1.95; 95%CI: 1.31-2.91), and non-use of surfactant (OR = 0.54; 95%CI: 0.43-0.69). Death during NICU care is determined by conditions of the pregnancy, childbirth, and the newborn.
Related JoVE Video
Neonatal near miss in the Birth in Brazil survey.
Cad Saude Publica
PUBLISHED: 01-28-2014
Show Abstract
Hide Abstract
This study used data from the Birth in Brazil survey, a nationwide hospital-based study of 24,197 postpartum women and their newborns, collected between February 2011 and July 2012. A three-stage cluster sampling design (hospitals, days, women) was used consisting of stratification by geographic region, type of municipality (capital or non-capital), and type of hospital financing. Logistic regression was used to identify variables that were potential predictors of neonatal mortality and neonatal near miss indicators. After testing nineteen variables, five were chosen to compose a set of neonatal near miss indicators (birth weight of less than 1,500 g, Apgar score of less than 7 in the 5th minute of life, use of mechanical ventilation, gestational age of less than 32 weeks and congenital malformations). The neonatal near miss rate in the Birth in Brazil survey was 39.2 per thousand live births, three and a half times higher than the neonatal mortality rate (11.1 per thousand). These neonatal near miss indicators were able to identify situations with a high risk of neonatal death.
Related JoVE Video
Rice fortified with iron given weekly increases hemoglobin levels and reduces anemia in infants: a community intervention trial.
Int J Vitam Nutr Res
PUBLISHED: 11-14-2013
Show Abstract
Hide Abstract
More than two billion people suffer from anemia worldwide, and it is estimated that more than 50 % of cases are caused by iron deficiency. In this community intervention trial, we evaluated infants aged 10 to 23 months of age (n = 171) from two public child day-care centers. Intervention lasted 18 weeks. The 50-g individual portion (uncooked) of fortified rice provided 56.4 mg of elemental iron as ferric pyrophosphate. Capillary blood samples to test for anemia were taken at baseline and at endpoint. The objective of this study was to evaluate the impact of rice fortified with iron (Ultrarice®) on hemoglobin and anemia prevalence compared with standard household rice. For the fortified rice center, baseline mean hemoglobin was 113.7 ± 9.2 g/L, and at endpoint 119.5 ± 7.7 g/L, p < 0.0001; for the standard rice center, baseline mean hemoglobin value was 113.5 ± 40.7 g/L, and at endpoint 113.6 ± 21.0, p = 0.99. Anemia prevalence for the fortified rice center was 27.8 % (20/72) at baseline, and 11.1 % (8/72) at endpoint, p = 0.012; for the control center, 47.1 % (33/70) were anemic at baseline, and 37.1 % (26/70) at the end of the study, p = 0.23. The Number Needed to Treat (NNT) was 4. In this intervention, rice fortified with iron given weekly was effective in increasing hemoglobin levels and reducing anemia in infants.
Related JoVE Video
Facilitative effects of bi-hemispheric tDCS in cognitive deficits of Parkinson disease patients.
Med. Hypotheses
PUBLISHED: 08-20-2013
Show Abstract
Hide Abstract
Parkinsons disease (PD) is a progressive neurodegenerative disorder, primarily characterized by motor symptoms such as tremor, rigidity, bradykinesia, stiffness, slowness and impaired equilibrium. Although the motor symptoms have been the focus in PD, slight cognitive deficits are commonly found in non-demented and non-depressed PD patients, even in early stages of the disease, which have been linked to the subsequent development of pathological dementia. Thus, strongly reducing the quality of life (QoL). Both levodopa therapy and deep brain stimulation (DBS) have yield controversial results concerning the cognitive symptoms amelioration in PD patients. That does not seems to be the case with transcranial direct current stimulation (tDCS), although better stimulation parameters are needed. Therefore we hypothesize that simultaneously delivering cathodal tDCS (or ctDCS), over the right prefrontal cortex delivered with anodal tDCS (or atDCS) to left prefrontal cortex could be potentially beneficial for PD patients, either by mechanisms of homeostatic plasticity and by increases in the extracellular dopamine levels over the striatum.
Related JoVE Video
Psychophysiological correlates of sexually and non-sexually motivated attention to film clips in a workload task.
PLoS ONE
PUBLISHED: 05-16-2011
Show Abstract
Hide Abstract
Some authors have speculated that the cognitive component (P3) of the Event-Related Potential (ERP) can function as a psychophysiological measure of sexual interest. The aim of this study was to determine if the P3 ERP component in a workload task can be used as a specific and objective measure of sexual motivation by comparing the neurophysiologic response to stimuli of motivational relevance with different levels of valence and arousal. A total of 30 healthy volunteers watched different films clips with erotic, horror, social-positive and social-negative content, while answering an auditory oddball paradigm. Erotic film clips resulted in larger interference when compared to both the social-positive and auditory alone conditions. Horror film clips resulted in the highest levels of interference with smaller P3 amplitudes than erotic and also than social-positive, social-negative and auditory alone condition. No gender differences were found. Both horror and erotic film clips significantly decreased heart rate (HR) when compared to both social-positive and social-negative films. The erotic film clips significantly increased the skin conductance level (SCL) compared to the social-negative films. The horror film clips significantly increased the SCL compared to both social-positive and social-negative films. Both the highly arousing erotic and non-erotic (horror) movies produced the largest decrease in the P3 amplitude, a decrease in the HR and an increase in the SCL. These data support the notion that this workload task is very sensitive to the attentional resources allocated to the film clip, although they do not act as a specific index of sexual interest. Therefore, the use of this methodology seems to be of questionable utility as a specific measure of sexual interest or as an objective measure of the severity of Hypoactive Sexual Desire Disorder.
Related JoVE Video
Task-specific effects of tDCS-induced cortical excitability changes on cognitive and motor sequence set shifting performance.
PLoS ONE
PUBLISHED: 04-26-2011
Show Abstract
Hide Abstract
In this study, we tested the effects of transcranial Direct Current Stimulation (tDCS) on two set shifting tasks. Set shifting ability is defined as the capacity to switch between mental sets or actions and requires the activation of a distributed neural network. Thirty healthy subjects (fifteen per site) received anodal, cathodal and sham stimulation of the dorsolateral prefrontal cortex (DLPFC) or the primary motor cortex (M1). We measured set shifting in both cognitive and motor tasks. The results show that both anodal and cathodal single session tDCS can modulate cognitive and motor tasks. However, an interaction was found between task and type of stimulation as anodal tDCS of DLPFC and M1 was found to increase performance in the cognitive task, while cathodal tDCS of DLPFC and M1 had the opposite effect on the motor task. Additionally, tDCS effects seem to be most evident on the speed of changing sets, rather than on reducing the number of errors or increasing the efficacy of irrelevant set filtering.
Related JoVE Video
Obsessive Compulsive Disorder as a functional interhemispheric imbalance at the thalamic level.
Med. Hypotheses
PUBLISHED: 03-10-2011
Show Abstract
Hide Abstract
Obsessive Compulsive Disorder (OCD) involves failures in two main inhibitory processes, namely cognitive (obsessions) and behavioral (compulsions). Recent research has supported two cortical-subcortical pathways on OCD pathogenesis: (a) the frontostriatal loop (dorsolateral-caudate-striatum-thalamus) responsible for impairments of behavioral inhibition; (b) the orbitofrontal loop (orbitofrontal, medial prefrontal and cingulate) responsible for impairments with cognitive inhibitory processes. These failures in both cognitive and motor inhibitory systems may mediate several neuropsychological deficits in these patients, namely memory, attention, planning and decision making. But are those deficits related to specific hemispheric effects, namely functional imbalance between hemispheres? In this article we hypothesize that: (1) OCD patients have an inter-hemispheric functional imbalance, probably due to inadequate filtering at the thalamic level; (2) the restoration of inter-hemispheric balance, will be correlative to symptomatic improvement.
Related JoVE Video
Weekly iron supplementation for the prevention of anemia in pre-school children: a randomized, double-blind, placebo-controlled trial.
J. Trop. Pediatr.
PUBLISHED: 02-01-2011
Show Abstract
Hide Abstract
This study analyses the impact of weekly iron supplementation with ferrous sulphate heptahydrate (FeSO4) in 5-year-olds compared with placebo, on hemoglobin (Hb) and hematocrit (Ht) values and anemia.
Related JoVE Video
[Linkage between live birth and infant death records in a municipality in Northeast Brazil: quality of the information system].
Cad Saude Publica
PUBLISHED: 03-04-2009
Show Abstract
Hide Abstract
The objective was to analyze the quality of the information systems for live births (SINASC) and mortality (SIM) based on database linkages. SINASC contained 11,182 certificates of live birth (CLB) from Jan. 1, 2000, to Dec. 31, 2002, and the SIM database recorded 233 death certificates (DC) for infants (< one year of age) from Jan. 1, 2000, to Dec. 31, 2003, 207 infant death investigations from Jan. 1, 2000, to Dec. 31, 2004, and 17 CLB attached to infant death investigations. Each DC was matched with a CLB through manual review. Of the 11,182 births in SINASC, 69 duplicate CLB and 3 CLB without the mothers name were eliminated. The 211 SIM/infant death investigations showed the following: 25 CLB (35.2% of deaths), 33 CLB (55.9% of deaths), 57 CLB (75% of deaths), and 4 CLB (80% of deaths). For 92 DC (43.6% of 211 deaths), matching was not possible, since there was no CLB. Infant death investigations were an important complementary source of 53 DC and 17 CLB. The study contributed to evaluation of the data quality and identification of flaws, favoring the reliability of birth and infant death records.
Related JoVE Video
Daily and Weekly Iron Supplementations are Effective in Increasing Hemoglobin and Reducing Anemia in Infants.
J. Trop. Pediatr.
Show Abstract
Hide Abstract
The objective of this study was to evaluate the effect of daily and weekly iron supplementation compared with control on hemoglobin values and anemia prevalence in infants.
Related JoVE Video
The effects of cross-hemispheric dorsolateral prefrontal cortex transcranial direct current stimulation (tDCS) on task switching.
Brain Stimul
Show Abstract
Hide Abstract
Task switching, defined as the ability to flexibly switch between tasks in the face of goal shifting, is a central mechanism in cognitive control. Task switching is thought to involve both prefrontal cortex (PFC) and parietal regions. Our previous work has shown that it is possible to modulate set shifting tasks using 1 mA tDCS on both the left dorsolateral prefrontal cortex and the left primary motor area. However, it remains unclear whether the effects of PFC tDCS on task switching are hemisphere-dependent.
Related JoVE Video
Birth in Brazil: national survey into labour and birth.
Reprod Health
Show Abstract
Hide Abstract
Caesarean section rates in Brazil have been steadily increasing. In 2009, for the first time, the number of children born by this type of procedure was greater than the number of vaginal births. Caesarean section is associated with a series of adverse effects on the women and newborn, and recent evidence suggests that the increasing rates of prematurity and low birth weight in Brazil are associated to the increasing rates of Caesarean section and labour induction.
Related JoVE Video
The Emotional Movie Database (EMDB): a self-report and psychophysiological study.
Appl Psychophysiol Biofeedback
Show Abstract
Hide Abstract
Film clips are an important tool for evoking emotional responses in the laboratory. When compared with other emotionally potent visual stimuli (e.g., pictures), film clips seem to be more effective in eliciting emotions for longer periods of time at both the subjective and physiological levels. The main objective of the present study was to develop a new database of affective film clips without auditory content, based on a dimensional approach to emotional stimuli (valence, arousal and dominance). The study had three different phases: (1) the pre-selection and editing of 52 film clips (2) the self-report rating of these film clips by a sample of 113 participants and (3) psychophysiological assessment [skin conductance level (SCL) and the heart rate (HR)] on 32 volunteers. Film clips from different categories were selected to elicit emotional states from different quadrants of affective space. The results also showed that sustained exposure to the affective film clips resulted in a pattern of a SCL increase and HR deceleration in high arousal conditions (i.e., horror and erotic conditions). The resulting emotional movie database can reliably be used in research requiring the presentation of non-auditory film clips with different ratings of valence, arousal and dominance.
Related JoVE Video
[Determinants of neonatal mortality: a case-control study in Fortaleza, Ceará State, Brazil].
Cad Saude Publica
Show Abstract
Hide Abstract
This case-control study with 132 cases and 264 controls aimed to determine predictors of neonatal mortality using hierarchical modeling. Cases were defined as newborns that died within 28 days of birth, and controls as the survivors, among infants of mothers living in Fortaleza, Ceará State, Brazil. Hierarchical logistic regression identified factors associated with neonatal death: maternal race, with brown/black race showing a protective effect (OR = 0.23; IC95%: 0.09-0.56), time spent from home to the hospital > 30 minutes (OR = 3.12; 95%CI: 1.34-7.25), time < 1h or > 10 hours between hospital admission and delivery (OR = 2.43; 95%CI: 1.24-4.76), inadequate prenatal care (OR = 2.03; 95%CI: 1.03-3.99), low birth weight (OR = 14.75; 95%CI: 5.26-41.35), prematurity (OR = 3.41; 95%CI: 1.29-8.98), and male gender (OR = 2.09; 95%CI: 1.09-4.03). In this case series, neonatal deaths were associated with the quality of prenatal care and direct care during labor.
Related JoVE Video
Affective picture modulation: valence, arousal, attention allocation and motivational significance.
Int J Psychophysiol
Show Abstract
Hide Abstract
The present study analyses the modulatory effects of affective pictures in the early posterior negativity (EPN), the late positive potential (LPP) and the human startle response on both the peripheral (eye blink EMG) and central neurophysiological levels (Probe P3), during passive affective pictures viewing. The affective pictures categories were balanced in terms of valence (pleasant; unpleasant) and arousal (high; low). The data shows that EPN may be sensitive to specific stimulus characteristics (affective relevant pictures versus neutral pictures) associated with early stages of attentional processing. In later stages, the heightened attentional resource allocation as well as the motivated significance of the affective stimuli was found to elicit enhanced amplitudes of slow wave processes thought to be related to enhanced encoding, namely LPP,. Although pleasant low arousing pictures were effective in engaging the resources involved in the slow wave processes, the highly arousing affective stimuli (pleasant and unpleasant) were found to produce the largest enhancement of the LPP, suggesting that high arousing stimuli may are associated with increased motivational significance. Additionally the response to high arousing stimuli may be suggestive of increased motivational attention, given the heightened attentional allocation, as expressed in the P3 probe, especially for the pleasant pictures. The hedonic valence may then serve as a mediator of the attentional inhibition to the affective priming, potentiating or inhibiting a shift towards defensive activation, as measured by the startle reflex.
Related JoVE Video

What is Visualize?

JoVE Visualize is a tool created to match the last 5 years of PubMed publications to methods in JoVE's video library.

How does it work?

We use abstracts found on PubMed and match them to JoVE videos to create a list of 10 to 30 related methods videos.

Video X seems to be unrelated to Abstract Y...

In developing our video relationships, we compare around 5 million PubMed articles to our library of over 4,500 methods videos. In some cases the language used in the PubMed abstracts makes matching that content to a JoVE video difficult. In other cases, there happens not to be any content in our video library that is relevant to the topic of a given abstract. In these cases, our algorithms are trying their best to display videos with relevant content, which can sometimes result in matched videos with only a slight relation.