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https://www.readbyqxmd.com/read/28429997/attitudes-toward-cognitive-enhancer-use-among-new-zealand-tertiary-students
#1
Sanyogita Sanya Ram, Safeera Hussainy, Marcus Henning, Kay Stewart, Maree Jensen, Bruce Russell
BACKGROUND: Cognitive enhancement is the use of prescription stimulant medicines by healthy individuals for nonmedical use in academic settings. Commonly used cognitive enhancers (CEs) include methylphenidate, amphetamines, and modafinil. To understand the motivation to use CEs, it is important to look beyond prevalence and explore the extent to which attitudes, beliefs, and intentions predict the decision to use CEs. OBJECTIVE: The study aimed to investigate what factors explain the decision to use CEs among tertiary students in New Zealand, using the Theory of Planned Behaviour (TPB)...
April 21, 2017: Substance Use & Misuse
https://www.readbyqxmd.com/read/28424597/working-memory-after-traumatic-brain-injury-the-neural-basis-of-improved-performance-with-methylphenidate
#2
Anne E Manktelow, David K Menon, Barbara J Sahakian, Emmanuel A Stamatakis
Traumatic brain injury (TBI) often results in cognitive impairments for patients. The aim of this proof of concept study was to establish the nature of abnormalities, in terms of activity and connectivity, in the working memory network of TBI patients and how these relate to compromised behavioral outcomes. Further, this study examined the neural correlates of working memory improvement following the administration of methylphenidate. We report behavioral, functional and structural MRI data from a group of 15 Healthy Controls (HC) and a group of 15 TBI patients, acquired during the execution of the N-back task...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28424564/new-developments-in-the-management-of-narcolepsy
#3
REVIEW
Vivien C Abad, Christian Guilleminault
Narcolepsy is a life-long, underrecognized sleep disorder that affects 0.02%-0.18% of the US and Western European populations. Genetic predisposition is suspected because of narcolepsy's strong association with HLA DQB1*06-02, and genome-wide association studies have identified polymorphisms in T-cell receptor loci. Narcolepsy pathophysiology is linked to loss of signaling by hypocretin-producing neurons; an autoimmune etiology possibly triggered by some environmental agent may precipitate hypocretin neuronal loss...
2017: Nature and Science of Sleep
https://www.readbyqxmd.com/read/28422635/simulated-driving-skills-evaluation-of-teenagers-with-attention-deficit-hyperactivity-disorder-before-driving-lessons
#4
Navah Zelda Ratzon, Efrat Kadury Lunievsky, Arie Ashkenasi, Joseph Laks, Herman Avner Cohen
OBJECTIVE: We evaluated the driving skills of teenagers with attention deficit hyperactivity disorder (ADHD) during simulated driving before starting driving lessons and observed whether methylphenidate (MPH) affected their performance. METHOD: Sixty teenagers ages 15-18 yr were included; 29 teenagers with ADHD were tested with and without MPH, and 31 teenagers (control group) were tested once. All participants were tested on the STISIM Drive™ simulator. RESULTS: The number of center-line crossings was higher in the group without MPH treatment than in the control group and the MPH-treated group...
May 2017: American Journal of Occupational Therapy: Official Publication of the American Occupational Therapy Association
https://www.readbyqxmd.com/read/28420586/impaired-oral-absorption-of-methylphenidate-after-roux-en-y-gastric-bypass
#5
REVIEW
Carmil Azran, Peter Langguth, Arik Dahan
The anatomic and physiologic changes in the gastrointestinal (GI) tract after bariatric surgery may significantly affect the pharmacokinetics of medications taken by the patients for various reasons. Unfortunately, there is little information regarding changes in drug absorption after bariatric surgeries, limiting the ability of medical professionals to produce clear recommendations on what changes should be made to the formulations and dosing regimens of drugs after bariatric surgery. In this article, we report and analyze a case of 52-year-old male patient with morbid obesity and attention-deficit/hyperactivity disorder (ADHD) who experienced lack of methylphenidate efficacy after Roux en-Y gastric bypass (RYGB), which was eventually resolved by using the transdermal patch instead of an oral product...
March 9, 2017: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/28419660/acute-masseter-dystonia-in-a-pediatric-patient-receiving-aripiprazole-and-methylphenidate-following-induction-of-general-anesthesia
#6
Michelle LeRiger, Jasper Williams, Greta Duncan-Wiebe, Mohanad Shukry
An 11-year-old male receiving aripiprazole, methylphenidate, and clonidine developed acute masseter dystonia inhibiting tracheal intubation after induction of general anesthesia with propofol and rocuronium. Following emergence, he had trismus and jaw discomfort. Psychiatry consultation suspected an acute dystonic reaction, so diphenhydramine was administered intravenously which resolved symptoms. We suspect chronic aripiprazole and methylphenidate usage combined with propofol administration in the short-term absence of methylphenidate made this patient susceptible to dystonic reactions...
April 17, 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28417219/treatment-effect-of-methylphenidate-on-intrinsic-functional-brain-network-in-medication-na%C3%A3-ve-adhd-children-a-multivariate-analysis
#7
Jae Hyun Yoo, Dohyun Kim, Jeewook Choi, Bumseok Jeong
Methylphenidate is a first-line therapeutic option for treating attention-deficit/hyperactivity disorder (ADHD); however, elicited changes on resting-state functional networks (RSFNs) are not well understood. This study investigated the treatment effect of methylphenidate using a variety of RSFN analyses and explored the collaborative influences of treatment-relevant RSFN changes in children with ADHD. Resting-state functional magnetic resonance imaging was acquired from 20 medication-naïve ADHD children before methylphenidate treatment and twelve weeks later...
April 17, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28416594/new-repeat-polymorphism-in-the-akt1-gene-predicts-striatal-dopamine-d2-d3-receptor-availability-and-stimulant-induced-dopamine-release-in-the-healthy-human-brain
#8
Elena Shumay, Corinde E Wiers, Ehsan Shokri-Kojori, Sung Won Kim, Colin A Hodgkinson, Hui Sun, Dardo Tomasi, Christopher T Wong, Daniel R Weinberger, Gene-Jack Wang, Joanna S Fowler, Nora D Volkow
The role of the protein kinase Akt1 in dopamine neurotransmission is well recognized and has been implicated in schizophrenia and psychosis. However, the extent to which variants in the AKT1 gene influence dopamine neurotransmission is not well understood.Here we investigated the effect of a newly characterized variant number tandem repeat (VNTR) polymorphism in AKT1 (major alleles: L- (8 repeats) and H- (9 repeats)) on striatal dopamine D2/D3 receptor (DRD2) availability and on dopamine release in healthy volunteers...
April 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28413936/processing-speed-can-monitor-stimulant-medication-effects-in-adults-with-attention-deficit-disorder-with-hyperactivity
#9
Niels Peter Nielsen, Elisabeth H Wiig, Svante Bäck, Jan Gustafsson
BACKGROUND: Treatment responses to methylphenidate by adults with ADHD are generally monitored against DSM-IV/DSM-V symptomatology, rating scales or interviews during reviews. AIMS: To evaluate the use of single- and dual-dimension processing-speed and efficiency measures to monitor the effects of pharmacological treatment with methylphenidate after a short period off medication. METHODS: A Quick Test of Cognitive Speed (AQT) monitored the effects of immediate-release methylphenidate in 40 previously diagnosed and medicated adults with ADHD...
May 2017: Nordic Journal of Psychiatry
https://www.readbyqxmd.com/read/28412445/methylphenidate-effects-in-the-young-brain-friend-or-foe
#10
REVIEW
Sara Loureiro-Vieira, Vera Marisa Costa, Maria de Lourdes Bastos, Félix Carvalho, João Paulo Soares Capela
Attention deficit hyperactivity disorder (ADHD) is one of the most prevalent neuropsychiatry disorders in children and adolescents, and methylphenidate (MPH) is a first-line stimulant drug available worldwide for its treatment. Despite the proven therapeutic efficacy, concerns have been raised regarding the possible consequences of chronic MPH exposure during childhood and adolescence. Disturbances in the neurodevelopment at these crucial stages are major concerns given the unknown future life consequences...
April 12, 2017: International Journal of Developmental Neuroscience
https://www.readbyqxmd.com/read/28411257/relief-of-pain-depressed-behavior-in-rats-by-activation-of-d1-like-dopamine-receptors
#11
Matthew F Lazenka, Kelen C Freitas, Sydney Henck, S Stevens Negus
Clinically significant pain often includes depression of both behavior and mesolimbic dopamine signaling. Indirect and/or direct dopamine receptor agonists may alleviate pain-related behavioral depression. To test this hypothesis, the present study compared effects of indirect and direct dopamine agonists in a preclinical assay of pain-depressed operant responding. Male Sprague-Dawley rats with chronic indwelling microelectrodes in the medial forebrain bundle were trained in an intracranial self-stimulation (ICSS) procedure to press a lever for pulses of electrical brain stimulation...
April 14, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28400722/sex-differences-in-the-physiological-and-behavioral-effects-of-chronic-oral-methylphenidate-treatment-in-rats
#12
Lisa S Robison, Michalis Michaelos, Jason Gandhi, Dennis Fricke, Erick Miao, Chiu-Yim Lam, Anthony Mauceri, Melissa Vitale, Junho Lee, Soyeh Paeng, David E Komatsu, Michael Hadjiargyrou, Panayotis K Thanos
Methylphenidate (MP) is a psychostimulant prescribed for Attention Deficit Hyperactivity Disorder. Previously, we developed a dual bottle 8-h-limited-access-drinking-paradigm for oral MP treatment of rats that mimics the pharmacokinetic profile of treated patients. This study assessed sex differences in response to this treatment. Male and female Sprague Dawley rats were assigned to one of three treatment groups at 4 weeks of age (n = 12/group): Control (water), low dose (LD) MP, and high dose (HD) MP. Rats drank 4 mg/kg MP (LD) or 30 mg/kg MP (HD) during the first hour, and 10 mg/kg (LD) or 60 mg/kg MP (HD) for the remaining 7 h each day...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28398816/the-possible-effect-of-methylphenidate-treatment-on-empathy-in-children-diagnosed-with-attention-deficit-hyperactivity-disorder-both-with-and-without-comorbid-oppositional-defiant-disorder
#13
Pavel Golubchik, Abraham Weizman
OBJECTIVE: To assess the Empathizing Quotient (EQ) of patients diagnosed with attention-deficit/hyperactivity disorder (ADHD) only or comorbid with oppositional defiant disorder (ODD) and compare the two groups' responses to methylphenidate (MPH) treatment. METHODS: Fifty-two children (8-18 years) diagnosed with ADHD, 26 of whom were also diagnosed with comorbid ODD (ADHD/ODD), were treated with MPH for 12 weeks. The level of EQ was assessed with the Children's version of the Empathizing Quotient (EQ-C) and the severity of ADHD symptoms with the ADHD Rating Scale (ADHD-RS)...
February 16, 2017: Journal of Child and Adolescent Psychopharmacology
https://www.readbyqxmd.com/read/28396142/atypical-binding-at-dopamine-and-serotonin-transporters-contribute-to-the-discriminative-stimulus-effects-of-mephedrone
#14
Alyssa F DeLarge, Laura L Erwin, Peter J Winsauer
Mephedrone (4-methylmethcathinone), a constituent of the recreational substances known as "bath salts", is a synthetic cathinone that can produce auditory and visual hallucinations, as well as problematic cardiovascular effects. This study compared the discriminative stimulus effects of mephedrone (0.32-10 mg/kg) with other prototypical drugs of abuse: cocaine (0.56-32 mg/kg), d-amphetamine (0.18-3.2 mg/kg), ketamine (1.8-18 mg/kg), phencyclidine (PCP, 1-5.6 mg/kg), heroin (1-10 mg/kg), 2,5-dimethoxy-4-iodoamphetamine (R-DOI, 0...
April 7, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28394174/modified-release-methylphenidate-related-trichotillomania-in-a-boy-with-autism-spectrum-disorder
#15
Serkan Gunes
No abstract text is available yet for this article.
April 10, 2017: Journal of Child and Adolescent Psychopharmacology
https://www.readbyqxmd.com/read/28393639/the-safety-of-extended-release-drug-formulations-for-the-treatment-of-adhd
#16
Ann Childress
Attention-deficit/hyperactivity disorder (ADHD) is a complex neurobehavioral disorder affecting millions of patients worldwide. Effective treatments have been available for more than 60 years in the form of immediate-release (IR) stimulants However, stimulants have a high risk for abuse and are associated with adverse effects Including elevated blood pressure and heart rate, insomnia and decreased appetite. IR formulations also require multiple daily dosing. The search for improved safety, tolerability and convenience has led to the development of multiple extended-release (ER) stimulant and non-stimulant formulations...
April 10, 2017: Expert Opinion on Drug Safety
https://www.readbyqxmd.com/read/28393397/sex-differences-in-subjective-and-objective-responses-to-a-stimulant-medication-methylphenidate-comparisons-between-overweight-obese-adults-with-and-without-binge-eating-disorder
#17
(no author information available yet)
No abstract text is available yet for this article.
April 2017: International Journal of Eating Disorders
https://www.readbyqxmd.com/read/28391507/interaction-of-chronic-food-restriction-and-methylphenidate-in-sensation-seeking-of-rats
#18
Aleksandr D Talishinsky, Celine Nicolas, Satoshi Ikemoto
RATIONALE: It is necessary to understand better how chronic food restriction (CFR) and psychostimulant drugs interact in motivated behavior unrelated to food or energy homeostasis. OBJECTIVES: We examined whether CFR augments methylphenidate (MPH)-potentiated responding reinforced by visual sensation (VS) and whether repeated MPH injections or prolonged CFR further augments such responses. METHODS: Before starting the following experiments, rats on a CFR diet received a limited daily ration in such a way that their body weights decreased to 85-90% of their original weights over 2 weeks...
April 8, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28388850/auditory-and-visual-executive-functions-in-children-and-response-to-methylphenidate-a-randomized-controlled-trial
#19
Yaffa Hadar, Shraga Hocherman, Oren Lamm, Emanuel Tirosh
OBJECTIVES: The aim of the study was to assess auditory and visually based executive functions (EFs) and the effect of methylphenidate (MPH) in children with ADHD. METHODS: Thirty-six boys between the ages of 8.3 and 9.7 years with ADHD and 36 matched controls were included. The study group was randomized into MPH and placebo for 7 days each in a crossover design. A Cued Choice Reaction Time (CCRT) test that included incongruent cuing was administered at baseline and following 1 and 2 weeks...
April 1, 2017: Journal of Attention Disorders
https://www.readbyqxmd.com/read/28384334/correction-the-association-between-methylphenidate-treatment-and-the-risk-for-fracture-among-young-adhd-patients-a-nationwide-population-based-study-in-taiwan
#20
Vincent Chin-Hung Chen, Yao-Hsu Yang, Yin-To Liao, Ting-Yu Kuo, Hsin-Yi Liang, Kuo-You Huang, Yin-Cheng Huang, Yena Lee, Roger S McIntyre, Tzu-Chin Lin
[This corrects the article DOI: 10.1371/journal.pone.0173762.].
2017: PloS One
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