Ernesto Reyes Zamorano

• PhD
• Project Manager at Universidad Anáhuac México Sur

Cocaine use disorder (CUD) is a substance use disorder (SUD) characterized by compulsion to seek, use and abuse of cocaine, with severe health and economic consequences for the patients, their families and society. Due to the lack of successful treatments and high relapse rate, more research is needed to understand this and other SUD. Here, we pres...

Cocaine use disorder (CUD) is a substance use disorder (SUD) characterized by compulsion to seek, use and abuse of cocaine, with severe health and economic consequences for the patients, their families and society. Due to the lack of successful treatments and high relapse rate, more research is needed to understand this and other SUD. Here, we pres...

Introduction Older adults are not only at a higher medical risk during the COVID-19 pandemic, but they may also be a group particularly vulnerable to mental health diminishing. Objective To analyze the effect of some sociodemographic factors (sex and age) and medical conditions (diabetes and hypertension) on mental health and concerns about COVID-...

Introduction Inhalant use disorder has increased in spite of its adverse medical consequences. Due to the inherent difficulties of working with this population, so far there has been no quantifiable clinical evidence of the cognitive characteristics of inhalants users in early withdrawal and the clinic effect of consumption time. Objective To eval...

The objectives of this study were to describe severity of psychological distress (event-related stress, anxiety, and depression) during the second stage of COVID-19 pandemic in Mexico, and to explore associations between the indicators of psychological distress, sociodemographic characteristics and specific concerns about COVID-19. This report serv...

Introduction: Currently, misuse inhalants is increasing: addictive potential has been demonstrated in several studies. Until now there was no quantifiable clinical evidence of behavioral characteristics inhalant users. Main objective was to evaluate craving, impulsivity, frontalized behaviors and recognition of emotions in young inhalant users. M...

There is a growing need to address the variability in detecting cognitive deficits with standard tests in cocaine dependence (CD). The aim of the current study was to identify cognitive deficits by means of Machine Learning (ML) algorithms: Generalized Linear Model (Glm), Random forest (Rf) and Elastic Net (GlmNet), to allow more effective categori...

Introduction Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder affecting approximately 5% of the world population, with symptoms that may persist into adulthood. Despite the findings on the clinical course of this disorder, information regarding comorbidity patterns, psychosocial and executive functioning in adult lif...

Background and aims There is a growing need for detecting valid and generalizable markers due to a demand of accurate Cocaine Dependence diagnosis and treatment. Machine Learning (ML) is a modern statistical alternative to select from multiple observations the most reliable features, which allows precise and more effective categorization addressing...

Introduction: In this study we evaluated a recently developed test, the Ball Search Field Task (BSFT) as a neuropsychological tool for measuring cognitive and behavioral performance of individuals with disorders such as attention-deficit/hyperactivity disorder (ADHD), which are frequently accompanied by cognitive deficits and a lack of behavioral i...

The striatum and thalamus are subcortical structures intimately involved in addiction. The morphology and microstructure of these have been studied in murine models of cocaine addiction (CA), showing an effect of drug use, but also chronological age in morphology. Human studies using non-invasive magnetic resonance imaging (MRI) have shown inconsis...

The striatum and thalamus are subcortical structures intimately involved in addiction. The morphology and microstructure of these have been studied in murine models of cocaine addiction, showing an effect of drug use, but also chronological age in morphology. Human studies using non-invasive MRI have shown inconsistencies in volume changes, and hav...

Searching, defined for the purpose of the present study as the displacement of an individual to locate resources, is a fundamental behavior of all mobile organisms. In humans this behavior underlies many aspects of everyday life, involving cognitive processes such as sustained attention, memory and inhibition. We explored the performance of 36 trea...

Inhalants are substances widely used as recreational drugs: their addictive potential has been demonstrated by many studies. There is no reported measurable evidence of craving in inhalant users. The main goal of this study was to design and obtain evidence of validity of the score of a questionnaire for the evaluation of inhalant craving (ICQ) in...

Antecedentes. Una de las teorías de la personalidad más estudiadas es el modelo de los cinco factores, frecuentemente evaluado por medio del Inventario de los Cinco Grandes. A pesar de que existe una versión en español, aún se desconocen las características psicométricas de dicho instrumento en población mexicana. Método. Se evaluaron 472 adultos (...

Introduction One of the most researched theories of personality is the Five Factor Model, frequently evaluated through the Big Five Inventory. Even though there is a Spanish version, its psychometrical properties in Mexican population are yet unknown. Methods We evaluated 472 adults (217 male/255 female) from an open population from Mexico City. Re...

In order to make a valid adult ADHD diagnostic, the clinician must overcome a series of difficulties, the main of which may be the fact that the current DSM-IV diagnostic criteria for ADHD were designed for children, hence having valid and reliable instruments in order to screen for possible patients be very helpful. To validate the ASRS for its us...

Transcranial Magnetic Stimulation (rTMS) is a technique that allows noninvasive electrical stimulation of the cortex with few side effects. An antidepressant effect has been proposed when rTMS is delivered over prefrontal dorsolateral cortex (DLPFC) ≥5Hz. Quantitative EEG studies have shown increases in alpha and theta power bands as well as fronta...

Major Depressive Disorder (MDD) is a common psychiatric disorder that represents one of the main public health problems worldwide. It has been projected that for 2020 it will be the second cause of disability-adjusted life years just below ischemic heart disease. Quantitative electroencephalogram provides the opportunity to study cortical oscillato...

In order to perform a neuropsychologycal evaluation, the clinician may use several instruments; nevertheless, most of them have been designed for use on populations with very different social and cultural backgrounds from that of Mexico. This makes the research on the standardization of methods of evaluation for Mexican population a very important...

In order to perform a neuropsychologycal evaluation, the clinician may use several instruments; nevertheless, most of them have been designed for use on populations with very different social and cultural backgrounds from that of Mexico. This makes the research on the standardization of methods of evaluation for Mexican population a very important...

Over the last thirty years, there has been greater acceptance of the persistence of attention deficit/hiperactivity disorder (ADHD) into adulthood. Epidemiological data from open adult population show an ADHD prevalence at nearly 4%. ADHD evaluation in adults is a complex procedure that requires several things from the clinician: a) Symptoms should...

Over the last thirty years, there has been greater acceptance of the persistence of attention-deficit/hyperactivity disorder (ADHD) into adulthood. Epidemiological data from open adult population show an ADHD prevalence at nearly 4%. ADHD evaluation in adults is a complex procedure that requires several things from the clinician: a) Symptoms should...

Attention-deficit hyperactivity disorder (ADHD) is a clinically complex and multifactorial psychiatric disorder of inattention, hyperactivity and impulsivity. Family, twin and adoption studies suggest a genetic influence in the etiology of ADHD. Two variable number of tandem repeats (VNTR) polymorphic systems have been frequently associated with th...

EEG sources were assessed in a group of patients with major moderate-severe depressive disorder (MDD) as classified by trained clinicians according to DSM-IV criteria. Frequency Domain Variable Resolution Electromagnetic Tomography (FD-VARETA) was used to calculate EEG sources. The Z-values indicated that EEG sources were abnormal (increase in curr...

Attention deficit hyperactivity disorder (ADHD) is a neuro-developmental disorder clinically characterized by three core symptoms: deficits in attentional processes, failure in inhibitory control -usually expressed through behavioral and cognitive impulsiveness-, and motor and verbal restlessness. Deficit in attentional resources is the main altera...

La principal función afectada en el trastorno por déficit de atención con hiperactividad (TDAH) es la atención, la cual puede considerarse como un estado neurocognoscitivo cerebral de preparación que precede tanto a la percepción como a la acción. Los potenciales relacionados con eventos (PREs), una técnica útil en el estudio de la atención en esta...

Since the decade of the seventies, several neuropsychological abnormalities in very different cognitive domains have been described among patients with Obsessive-compulsive disorder (OCD). Due to the nature of these abnormalities, it was concluded that possibly the main dysfunction for this disorder was located in the right hemisphere, especially i...

La metodología de investigación, a partir del modelo del procesamiento de información con paradigmas neuropsicológicos de funcionamiento del lóbulo frontal, permite un estudio más específico de los trastornos psiquiátricos con fenomenología parecida, lo que a su vez permite crear modelos basados en una subtipología de índole cognoscitiva y, por end...

In order to select a control group of healthy adolescents, to be compared regarding different clinical aspects with a group of adolescents with Attention Deficit Disorder, we studied 37 subjects aged between 14 and 16, high school students, free of psychiatric pathology, according to The Kiddie Schedule for Affective Disorders and Schizophrenia (K-...

The attention deficit hyperactivity disorder (ADHD) is a pathological entity with a main place in the neuroscience research. Nevertheless, there are no paper on the relation between electroencephalogram's (EEG) absolute power (AP), an the cognitive deficits of the ADHD patients. The goal of the present work is to determinate if there is any relatio...

The Attention Deficit Disorder (ADD) is a developmental and chronical disorder, characterized mainly by a decrease in attention. Difficulties in the inhibitory control (expressed through behavioral and cognitive impulsiveness) and also verbal and motor restlessness are characteristic in this disorder. They should appear at an early age (before 7) a...

La tarea de ejecución continua (CPT, por sus siglas en inglés: Continuous Performance Test) es una prueba psicológica que evalúa dos de los síntomas primordiales del Trastorno por Déficit de Atención (TDA): la inatención y la impulsividad. Por otra parte, el electroencefalograma cuantificado ha demostrado ser también una herramienta útil en la eval...