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https://www.readbyqxmd.com/read/28530342/-behavioral-physiological-and-morphological-characteristics-associated-with-post-traumatic-response-to-continuous-exposure-versus-alternate-exposure-in-an-animal-model-of-post-traumatic-stress-disorder
#1
Ishay Ostfeld, Zeev Kaplan, Hagit Cohen
AIMS: The aim of this study was to approximate these conditions in an animal model of post-traumatic stress disorder (PTSD). More specifically, the neurobiological basis of these conditions, focusing on stress-related behavioral changes, HPA-axis and morphological were evaluated. The intention was to employ this well-validated, reproducible and reliable model for PTSD, to elicit data which will provide some guidance in the planning of a prospective study involving military personal. BACKGROUND: Combat personnel are exposed to significant stress and hardship, both physical and emotional, during their service and especially during active combat...
December 2016: Harefuah
https://www.readbyqxmd.com/read/28511980/reward-loss-and-the-basolateral-amygdala-a-function-in-reward-comparisons
#2
Katsuyoshi Kawasaki, Iván Annicchiarico, Amanda C Glueck, Ignacio Morón, Mauricio R Papini
The neural circuitry underlying behavior in reward loss situations is poorly understood. We considered two such situations: reward devaluation (from large to small rewards) and reward omission (from large rewards to no rewards). There is evidence that the central nucleus of the amygdala (CeA) plays a role in the negative emotion accompanying reward loss. However, little is known about the function of the basolateral nucleus (BLA) in reward loss. Two hypotheses of BLA function in reward loss, negative emotion and reward comparisons, were tested in an experiment involving pretraining excitotoxic BLA lesions followed by training in four tasks: consummatory successive negative contrast (cSNC), autoshaping (AS) acquisition and extinction, anticipatory negative contrast (ANC), and open field testing (OF)...
May 13, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28510066/the-delta-opioid-receptor-in-pain-control
#3
Khaled Abdallah, Louis Gendron
Nowadays, the delta opioid receptor (DOPr) represents a promising target for the treatment of chronic pain and emotional disorders. Despite the fact that they produce limited antinociceptive effects in healthy animals and in most acute pain models, DOPr agonists have shown efficacy in various chronic pain models. In this chapter, we review the progresses that have been made over the last decades in understanding the role played by DOPr in the control of pain. More specifically, the distribution of DOPr within the central nervous system and along pain pathways is presented...
May 17, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/28508125/judgement-bias-in-pigs-is-independent-of-performance-in-a-spatial-holeboard-task-and-conditional-discrimination-learning
#4
Sanne Roelofs, Eimear Murphy, Haifang Ni, Elise Gieling, Rebecca E Nordquist, F Josef van der Staay
Biases in judgement of ambiguous stimuli, as measured in a judgement bias task, have been proposed as a measure of the valence of affective states in animals. We recently suggested a list of criteria for behavioural tests of emotion, one of them stating that responses on the task used to assess emotionality should not be confounded by, among others, differences in learning capacity, i.e. must not simply reflect the cognitive capacity of an animal. We performed three independent studies in which pigs acquired a spatial holeboard task, a free choice maze which simultaneously assesses working memory and reference memory...
May 15, 2017: Animal Cognition
https://www.readbyqxmd.com/read/28441333/how-are-service-dogs-for-adults-with-post-traumatic-stress-disorder-integrated-with-rehabilitation-in-denmark-a-case-study
#5
Chalotte Glintborg, Tia G B Hansen
A severe mental illness like Post Traumatic Stress Disorder (PTSD) is known to have psychosocial consequences that can lead to a decreased quality of life. Research in Animal-Assisted Therapy (AAT) has revealed that the presence of a dog can have a positive effect on health, e.g., increase quality of life and lessen depression and anxiety. However, canine companionship is not a catch-all solution. Previous research has revealed methodological limitations that prohibit any clear conclusions, as well as a sparsity of critical reflection in anecdotal reports and case studies, which means that more research is needed to contextualize the findings...
April 25, 2017: Animals: An Open Access Journal From MDPI
https://www.readbyqxmd.com/read/28434586/the-periaqueductal-gray-and-primal-emotional-processing-critical-to-influence-complex-defensive-responses-fear-learning-and-reward-seeking
#6
REVIEW
Simone C Motta, Antônio P Carobrez, Newton S Canteras
The periaqueductal gray (PAG) has been commonly recognized as a downstream site in neural networks for the expression of a variety of behaviors and is thought to provide stereotyped responses. However, a growing body of evidence suggests that the PAG may exert more complex modulation of a number of behavioral responses and work as a unique hub supplying primal emotional tone to influence prosencephalic sites mediating complex aversive and appetitive responses. Of particular relevance, we review how the PAG is involved in influencing complex forms of defensive responses, such as circa-strike and risk assessment responses in animals...
May 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28431971/influence-of-stress-associated-with-chronic-alcohol-exposure-on-drinking
#7
REVIEW
Howard C Becker
Stress is commonly regarded as an important trigger for relapse and a significant factor that promotes increased motivation to drink in some individuals. However, the relationship between stress and alcohol is complex, likely changing in form during the transition from early moderated alcohol use to more heavy uncontrolled alcohol intake. A growing body of evidence indicates that prolonged excessive alcohol consumption serves as a potent stressor, producing persistent dysregulation of brain reward and stress systems beyond normal homeostatic limits...
April 18, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28379303/restoring-neuronal-progranulin-reverses-deficits-in-a-mouse-model-of-frontotemporal-dementia
#8
Andrew E Arrant, Anthony J Filiano, Daniel E Unger, Allen H Young, Erik D Roberson
Loss-of-function mutations in progranulin (GRN), a secreted glycoprotein expressed by neurons and microglia, are a common autosomal dominant cause of frontotemporal dementia, a neurodegenerative disease commonly characterized by disrupted social and emotional behaviour. GRN mutations are thought to cause frontotemporal dementia through progranulin haploinsufficiency, therefore, boosting progranulin expression from the intact allele is a rational treatment strategy. However, this approach has not been tested in an animal model of frontotemporal dementia and it is unclear if boosting progranulin could correct pre-existing deficits...
March 29, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28342763/serotonin-and-neuroplasticity-links-between-molecular-functional-and-structural-pathophysiology-in-depression
#9
REVIEW
Christoph Kraus, Eero Castrén, Siegfried Kasper, Rupert Lanzenberger
Serotonin modulates neuroplasticity, especially during early life, and dysfunctions in both systems likewise contribute to pathophysiology of depression. Recent findings demonstrate that serotonin reuptake inhibitors trigger reactivation of juvenile-like neuroplasticity. How these findings translate to clinical antidepressant treatment in major depressive disorder remains unclear. With this review, we link preclinical with clinical work on serotonin and neuroplasticity to bring two pathophysiologic models in clinical depression closer together...
March 22, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28286285/minocycline-reduces-mechanical-allodynia-and-depressive-like-behaviour-in-type-1-diabetes-mellitus-in-the-rat
#10
Diana Amorim, Sónia Puga, Rui Bragança, António Braga, Antti Pertovaara, Armando Almeida, Filipa Pinto-Ribeiro
A common and devastating complication of diabetes mellitus is painful diabetic neuropathy (PDN) that can be accompanied by emotional disorders such as depression. A few studies have suggested that minocycline that inhibits microglia may attenuate pain hypersensitivity in PDN. Moreover, a recent study reported that minocycline has an acute antidepressive-like effect in diabetic animals. Here we studied whether (i) prolonged minocycline treatment suppresses pain behaviour in PDN, (ii) the minocycline effect varies with submodality of pain, and (iii) the suppression of pain behaviour by prolonged minocycline treatment is associated with antidepressive-like effect...
June 1, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28283563/a-rapid-subcortical-amygdala-route-for-faces-irrespective-of-spatial-frequency-and-emotion
#11
Jessica McFadyen, Martial Mermillod, Jason B Mattingley, Veronika Halász, Marta I Garrido
There is significant controversy over the existence and function of a direct subcortical visual pathway to the amygdala. It is thought that this pathway rapidly transmits low spatial frequency information to the amygdala independently of the cortex and yet the directionality of this function has never been determined. We used magnetoencephalography to measure neural activity while human participants discriminated the gender of neutral and fearful faces filtered for low or high spatial frequencies. We applied dynamic causal modelling to demonstrate that the most likely underlying neural network consisted of a pulvinar-amygdala connection that was uninfluenced by spatial frequency or emotion, and a cortical-amygdala connection that conveyed high spatial frequencies...
March 10, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28266338/vocally-disruptive-behaviors-management-in-older-people-with-dementia
#12
Caroline Berastegui, Emmanuel Monfort, Bertrand Boudin
Although shouting is a common psycho-behavioral symptom in geriatric institutions, the question of its assessment and treatment remains seldom studied and has rarely been the subject of specific recommendations. The combination of the focus group method and brainstorming has emerged as a methodology both relevant and feasible in geriatric facility to identify the coping strategies used by professionals and generalize guidelines for clinical observation and vocally disruptive behaviors management (shouting)...
March 1, 2017: Gériatrie et Psychologie Neuropsychiatrie du Vieillissement
https://www.readbyqxmd.com/read/28263765/exogenous-testosterone-decreases-men-s-personal-distance-in-a-social-threat-context
#13
Lisa Wagels, Sina Radke, Katharina Sophia Goerlich, Ute Habel, Mikhail Votinov
BACKGROUND: Testosterone can motivate human approach and avoidance behavior. Specifically, the conscious recognition of and implicit reaction to angry facial expressions is influenced by testosterone. The study tested whether exogenous testosterone modulates the personal distance (PD) humans prefer in a social threat context. METHODS: 82 healthy male participants underwent either transdermal testosterone (testosterone group) or placebo application (placebo group)...
April 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28219487/evidence-for-the-risks-and-consequences-of-adolescent-cannabis-exposure
#14
REVIEW
Amir Levine, Kelly Clemenza, Moira Rynn, Jeffrey Lieberman
OBJECTIVE: This review of the scientific literature examines the potential adult sequelae of exposure to cannabis and related synthetic cannabinoids in adolescence. We examine the four neuropsychiatric outcomes that are likely most vulnerable to alteration by early cannabinoid use, as identified within both the clinical and preclinical research: cognition, emotional functioning, risk for psychosis, and addiction. METHOD: A literature search was conducted through PubMed, PsychInfo, and Google Scholar with no publication date restrictions...
March 2017: Journal of the American Academy of Child and Adolescent Psychiatry
https://www.readbyqxmd.com/read/28188857/sensitivity-to-carbon-dioxide-and-translational-studies-of-anxiety-disorders
#15
Marco Battaglia
Heightened concentrations of CO2 in inhaled air provoke temporary acidification of the brain, followed by compensatory hyperventilation and increased arousal/anxiety. These responses are likely to map a basic, latent general alarm/avoidance system that is largely shared across mammals, and are sources of individual differences. By showing paroxysmal respiratory and emotional responses to CO2 challenges, humans with panic and separation anxiety disorders lie at one extreme of the distribution for CO2 sensitivity...
February 8, 2017: Neuroscience
https://www.readbyqxmd.com/read/28179107/pro-inflammatory-immune-to-brain-signaling-is-involved-in-neuroendocrine-responses-to-acute-emotional-stress
#16
Jordi Serrats, Jan-Sebastian Grigoleit, Elena Alvarez-Salas, Paul E Sawchenko
Activation of the hypothalamo-pituitary-adrenal (HPA) axis by inflammatory stressors (e.g., bacterial lipopolysaccharide) is thought to involve vascular transduction of circulating cytokines, with perivascular macrophages (PVMs) along with endothelia, effecting activation of HPA control circuitry via inducible (cyclooxygenase-2- or COX-2-dependent) prostaglandin synthesis. To test the stressor-specificity of this mechanism, we examined whether ablation of PVMs or pharmacologic blockade of COX activity affected HPA responses to a representative emotional stressor, restraint...
February 4, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28141811/weakening-self-control-biases-the-emotional-evaluation-of-appetitive-cues
#17
Christian Dirk Wiesner, Christoph Lindner
Exerting self-control in a first task weakens self-control in a second completely unrelated task (ego-depletion). It has been proposed that ego-depletion increases approach motivation which would amplify positive emotions to appetitive cues. Here we investigated the effect of the depletion of cognitive self-control on the subsequent emotional evaluation of appetitive cues. Participants of the depletion group copied a text omitting frequent letters and thereby exerting self-control to inhibit automated writing habits...
2017: PloS One
https://www.readbyqxmd.com/read/28104355/allopregnanolone-induces-state-dependent-fear-via-the-bed-nucleus-of-the-stria-terminalis
#18
Gillian M Acca, Abel S Mathew, Jingji Jin, Stephen Maren, Naomi Nagaya
Gonadal steroids and their metabolites have been shown to be important modulators of emotional behavior. Allopregnanolone (ALLO), for example, is a metabolite of progesterone that has been linked to anxiety-related disorders such as posttraumatic stress disorder. In rodents, it has been shown to reduce anxiety in a number of behavioral paradigms including Pavlovian fear conditioning. We have recently found that expression of conditioned contextual (but not auditory) freezing in rats can be suppressed by infusion of ALLO into the bed nucleus of the stria terminalis (BNST)...
March 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28069437/indispensable-role-of-the-voltage-gated-calcium-channels-in-the-procognitive-effects-of-angiotensin-iv
#19
Jan Józef Braszko
BACKGROUND: Voltage-gated calcium channels (VGCCs) play a major role in brain functioning, including that of cognition-related structures such as cerebral cortex and hippocampus. Cellular mechanisms underlying learning and memory enhancing effect of the neuropeptide angiotensin IV (Ang IV) have been linked to VGCCs but only in respect of its long-term potentiation (LTP)-inducing effect. OBJECTIVE: To assess behaviorally effects of L- and T-type VGCCs blocking drugs in low, behaviorally inactive, doses on Ang IV facilitation of recall of aversively (foot-shock) and appetitively (curiosity for novelty) motivated behaviors...
January 6, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28054809/differential-patterns-of-constant-frequency-50-and-22-khz-usv-production-are-related-to-intensity-of-negative-affective-state
#20
James O Taylor, Catherine M Urbano, Brenton G Cooper
Adult rat ultrasonic vocalizations (USVs) are a valuable tool for noninvasively assessing an animal's emotional state. USVs are produced in 1 of 2 frequency ranges labeled as 22 kHz or 50 kHz vocalizations. One USV subtype within the 50 kHz call category, constant frequency 50 kHz (CF 50 kHz) calls, is not viewed as signaling an emotional state. The current study tested the hypothesis that CF 50 kHz calls are related to a mild negative affective state. In Experiment 1, diazepam (1, 2.5, or 5 mg/kg), or control injections were administered prior to receiving a sequence of mild footshocks (0...
February 2017: Behavioral Neuroscience
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