By H. Jaffar. Morehouse College.
We also do not know the impact of Superior frontal gyrus and anterior cingulate volumes did chronic or recurrent strepto- not differ between OCDpatients and controls buy nizagara 50 mg amex. Further leagues (87) reported no significant differences between study is clearly warranted cheap 50 mg nizagara mastercard. It also illustrates how function, neurobehavioral response inhibition, with no ab- brain imaging is exploiting advances in developmental normalities in working memory (delayed response) or pre- neurobiology with important implications for neurodiag- paratory set (Fig. Monkey studies and human clini- nostic assessment and treatment development. A neurode- cal studies suggest that ventral prefrontal cortex plays a velopmental perspective is equally critical as illustrated in critical role in mediating the suppression of context inappro- the following. Subsequent investi- Morphometric MRI measurement of the prefrontal cortex gation demonstrated increased corpus callosal area in treat- has also yielded conflicting findings. Total prefrontal corti- ment-naive pediatric OCDpatients compared to controls, Chapter 113: Imaging and Neurocircuitry of OCD 1627 FIGURE 113. Association of titers, diagnoses, and basal gan- glia volumes. The interaction of antistreptolysin 0 titers with at- tention-deficit/hyperactivity disorder and obsessive-compulsive disorder diagnoses are presented graphically. Basal ganglia vol- umes are adjusted for the effects of all independent variables in the multivariate analysis of covariance (Table 113. These volume residuals are plotted against the raw antistreptolysin 0 values for each of the relevant diagnostic groups. Titers are plotted in dark circles for the noted diagnostic group and in lighter diamonds for all other subjects. Reprinted from Peterson BS, Leckman JF, Tucker D, et al. Preliminary find- ings of antistreptococcal antibody titers and basal ganglia vol- umes in tic, obsessive-compulsive, and attention deficit/hyperac- tivity disorders. In support of this hypoth- The corpus callosum connects the cerebral hemispheres so esis, MacMaster and colleagues (92) reported increased sig- that the genu connects ventral prefrontal cortex and the nal intensity localized to the genu region of the corpus callo- striatum, whereas the splenium connects temporal lobe re- sum in pediatric OCDpatients compared to controls. Increased genu area in pediatric OCDpatients could be Rosenberg and associates (91) also noted that the age- related to excess myelin sheath thickness (92). An alternative related increase in corpus callosal area in healthy children explanation is abnormal pruning or reduction of neural ele- and adolescents was absent in OCDpatients (Fig. This may be less likely Controls achieved comparable corpus callosal areas to their because neuronal apoptosis occurs very early in development age-matched OCDcounterparts between 16 and 18 years of (121), whereas myelinization takes place during the peak age, which is consistent with prior findings of no significant periods of onset of pediatric OCD(122). Postnatal reduction or delay in creased ventral prefrontal cortical volumes in anterior cingu- myelination in OCDhas been hypothesized to be involved late cortex in 21 treatment-naive pediatric OCDpatients 1628 Neuropsychopharmacology: The Fifth Generation of Progress TABLE 113. ANTIBODY AND DIAGNOSIS ASSOCIATIONS WITH BASAL GANGLIA VOLUMES Type 3 Type 3 Independent Basal Sum of Independent Basal Sm of Variable Ganglia Squares Fa Pb Varible Ganglia Squares Fa Pb Age Caudate R 185 622. ADHD, attention-deficit/hyperactivity disorder; ASO, antistreptolysin O; CTD, chronic tic disorder; ellipses, error terms; GP, globus pallidus; L, left; OCD, obsessive-compulsive disorder; R, right; x, statistical interaction of adjacent terms; lighter shading indicates P <. Reprinted from Peterson BS, Leckman JF, Tucker D, et al. Preliminary findings of antistreptococcal antibody titers and basal ganglia volumes in tic, obsessive-compulsive, and attention deficit/hyperactivity disorders. Multivariate analysis of variance assessing the strength of the association of diagnosis-by-antibody interactions with basal ganglia volumes. Increased anterior cingulate volumes were in- posterior cingulate or dorsolateral prefrontal cortical vol- versely correlated with reduced striatal volumes in OCD umes between pediatric OCDpatients and controls (88). Oculomotor response inhibition abnormalities Thus, prefrontal cortical abnormalities in pediatric OCD also correlated with increased anterior cingulate volumes may be localized to ventral prefrontal anterior cingulate cir- and reduced striatal volumes in pediatric OCDpatients cuits, particularly in younger patients. Chapter 113: Imaging and Neurocircuitry of OCD 1629 FIGURE 113. Mean response suppression failures for nondepressed, psychotropic medication-naive pediatric patients with obsessive-compulsive disorder (OCD) and normal controls performing the antisaccadic task. Lines through distributions represent the mean value. Oculomotor response inhibition abnormalities in pediatric obsessive- compulsive disorder. Temporal Cortex subtle abnormalities in this circuitry. It should be noted that it is often difficult to distinguish the amygdala and The temporal limbic structures, comprising the amygdala hippocampus even at the histologic level (132). This function Thalamus undergoes striking changes throughout childhood, adoles- cence, and early adulthood (126,127). Medial orbital frontal Volumetric abnormalities in ventral prefrontal cortex and cortex, anterior cingulate cortex, and ventral striatum re- the striatum in pediatric OCDpatients led to our studying ceive dense afferent projections from limbic regions, includ- the thalamus, the final subcortical input to frontal cortex. Jenike and co-workers (84) reported no significant differ- Initial MRI investigation in adult OCDpatients and ences in thalamic volume in adult OCDpatients, many of healthy controls revealed no significant differences in mesio- whom had been treated with psychotropic medication and temporal lobe brain structures (84,95,105). In contrast, Gilbert and co- investigation by Szesko and colleagues (107) using criteria workers (76) demonstrated significantly increased thalamic from postmortem histologic analysis (129) with a semiauto- volume as measured by volumetric MRI in 21 treatment- mated computerized system (130) demonstrated bilateral naive, pediatric OCDpatients compared to 21 age- and reductions in amygdala volume in OCDpatients as com- sex-matched healthy controls (Fig. No significant differences be- callosum and anterior cingulate cortex, volumetric abnor- tween OCDpatients and controls were observed in the hip- malities in the thalamus were particularly pronounced in pocampus. After mono- Recent investigation in pediatric OCDpatients has also drug therapy with the SSRI, paroxetine, thalamic volumes implicated the amygdala (87,91). Specifically, Rosenberg decreased to levels comparable to those observed in healthy and associates (87) reported reduced putamen but not cau- children. Reduction in thalamic volume was positively cor- date volumes in treatment-naive pediatric OCDpatients. In contrast, served after temporal lobe lesions (131).
Child generic 50 mg nizagara, parent and school engagement scores discount nizagara 100mg with amex, as well as the qualitative data from the focus groups and interviews relating to enjoyment and engagement of the programme, are presented here. Evidence of possible mechanisms leading to engagement/enjoyment (e. Each quotation presented is referenced with the source (school number, P = parent, T = teacher, LEC = less engaged child, EC = engaged child). We also present relevant data from the parent questionnaire (see Appendix 10). Twenty-four children had missing engagement scores (13 children had moved out of the area, eight children had changed schools before the one-to-one goal-setting discussion and three children were absent on multiple visits by the HeLP co-ordinator) and had not set goals. Based on the child engagement scoring system, 92% (602/652) of children were deemed to be engaged with HeLP. Similar percentages of boys and girls were considered engaged (91% and 94%, respectively); however, those children in schools that had more than one Year 5 class had a greater percentage of engaged children than those with only one Year 5 class (97% and 82%; respectively). Table 39 shows that HeLP was able to engage children across the socioeconomic spectrum, although there were slightly more children from the most deprived quartiles in the less engaged category. There was very clear evidence from all sources (teachers, parents and children) in the interviews and focus groups that children really enjoyed and engaged with all aspects of the the programme across all schools. Female LEC, school 14 TABLE 39 Child engagement by IMD ranka Number (%) of less Number (%) of Deprivation quartile engaged children engaged children Total number of children 1 (most deprived) 16 (33) 156 (26) 172 2 15 (31) 143 (24) 158 3 8 (16) 147 (24) 155 4 (least deprived) 10 (20) 155 (26) 165 Total 49 601 650 a Two children could not be included in the analysis of engagement by IMD rank as we did not have their postcodes. This issue may be freely reproduced for the purposes of private research and study and extracts (or indeed, the full report) may be included in professional journals 79 provided that suitable acknowledgement is made and the reproduction is not associated with any form of advertising. Applications for commercial reproduction should be addressed to: NIHR Journals Library, National Institute for Health Research, Evaluation, Trials and Studies Coordinating Centre, Alpha House, University of Southampton Science Park, Southampton SO16 7NS, UK. PROCESS EVALUATION Amazing, fun, healthy, extraordinary and the best! Female EC, school 7 It was brilliant it was such good fun; the children reacted to it really positively. In fact I have not heard them say anything negative about it at all. Male LEC, school 12 The reason I liked the Healthy Lifestyles Week was because you were actually seeing what, sort of like a made-up version of four different people who have trouble and the ways you can improve it by just following them. In school we obviously do literacy and maths when we have to write stuff down but you could really express your emotions through drama, I really liked that. Female EC, school 6 Awesome, it was really fun though because we got to act and then they told us what was in stuff. They acted out as children, but they were like the cool teenage children which children can relate to. I thought the idea of having 80 NIHR Journals Library www. T, school 13 Yes, yeah there was one boy who would, well no two of them in fact that would never ever ever get up and do any drama or anything and they were up taking part in everything. I was so touched with emotion I had to run out and tell mum at the end of the day. T, school 10 And the acting just lifted it 100 times more and to them it was so important and to them. They were so linked to those characters and it was such a clever thing. T, school 15 In the parent questionnaire, almost two-thirds of parents reported that their child had talked a lot about the programme at home (see Appendix 10). Parents who were interviewed reported that their child was enthused and motivated to make changes, and that discussions had taken place at home about what they had been doing in school: She was always coming back and telling me what had been discussed. Like fruit winders and stuff and some stuff and my mum said like if they make the big front of the packet really appetising and want to make you feel like you want to buy them but then the back is like all small and you can hardly read it so they are trying to trick you to get the really unhealthy stuff but make it look really appetising. Male EC, school 16 I think my favourite part about it was doing the food machines. I especially liked how they used acting to show how the foods were made and what process they go through. This issue may be freely reproduced for the purposes of private research and study and extracts (or indeed, the full report) may be included in professional journals 81 provided that suitable acknowledgement is made and the reproduction is not associated with any form of advertising. Applications for commercial reproduction should be addressed to: NIHR Journals Library, National Institute for Health Research, Evaluation, Trials and Studies Coordinating Centre, Alpha House, University of Southampton Science Park, Southampton SO16 7NS, UK. P, school 14 Parent engagement Based on the parental engagement scoring system, just over three-quarters (77%, 520/676) of parents were deemed to have engaged with HeLP. Of the 130 parents who were considered less engaged, 20 also had less engaged children, while the other 30 less engaged children had engaged parents. The majority of parents interviewed spoke positively about the programme, reporting that it was a worthwhile project and supported the messages it was trying to promote at home. However, we do acknowledge that 87% of the parents interviewed were categorised as engaged, and thus were probably less likely to be critical in their interviews. Less engaged parent, school 16 TABLE 40 Parent engagement by IMD rank Number (%) of less Number (%) of Deprivation quartile engaged parents engaged parents Total number of parents 1 (most deprived) 45 (35) 127 (24) 172 2 31 (24) 127 (24) 158 3 25 (19) 130 (25) 155 4 (least deprived) 29 (22) 136 (26) 165 Total 130 520 650 82 NIHR Journals Library www. Check on stuff that you think some things you think are healthy are actually, got a lot more sugar content than you expected. Engaged parent, school 16 However, 18 parents reported some negative feelings towards certain aspects of the programme in their questionnaire responses. One parent, who felt that their child was a fussy eater, had a smaller range of foods to choose from as he wanted to cut down on less healthy options. One parent felt that it was the responsibility of the parents to educate their children about physical activity and health.
The prominent activation of the PFC (and projection areas) and the demonstrated a disruption of the functional connectivity between brain regions (Baliki et al 2008) are the probable explanation for chronic pain patients experiencing cheap nizagara 100 mg, in addition to pain order 100mg nizagara amex, depression and anxiety, sleep disturbance and decision-making (cognitive) abnormalities. Increased activity is also frequently demonstrated in the PAG (Gwilym et al, 2009) and the cerebellum. The PAG is an important component of the descending pain inhibition system, but the role of the cerebellum in chronic pain is unknown. There are similarities in the brain maps of individuals with the same chronic pain condition. However, overlap between the maps of different disorders, makes uncertain whether a distinct brain map will be discovered for each chronic pain disorder. In irritable bowel syndrome (IBS), PET demonstrated pain associated with rectal distention is associated with increased activity in the frontopolar region (Brodmann area 10; parts of the superior and middle frontal gyrus) and no activity in ACC. The reverse is the case in healthy individuals (Silverman et al, 1997). In IBS, MRI demonstrated gray matter density changes (increases and decreases) in regions associated with depression, anxiety and cognition (Seminowicz et al, 2010). In chronic back pain (CBP), magnetoencephalogam (MEG; which measures electrical activity) shows that the area of SI devoted to the back is enlarged and shifted medially (Flor et al, 1997; indicating “cortical reorganization”). In CBP, magnetic resonance spectroscopy (MRS; which quantifies chemical levels) shows that the N-acetyl aspartate (NAA) and glucose levels are elevated in the dorsolateral PFC, while glucose is reduced in Th (Grachev et al, 2000). MRS findings are independent of the cognitive level at the time, thus these chemical changes reflect long-term plastic modifications. In CBP, MRI demonstrates a 5-11% reduction in neocortical gray matter volume (Apkarian et al, 2004). This is equivalent to 10-20 years of normal aging, and represents 1. In CBP, fMRI demonstrates a disruption of the functional connectivity between brain regions (Baliki et al 2008). In OA hip (in patients with increased sensitivity and referred pain), fMRI demonstrates increased activity in ACC, DLPFC and PAG (among others, Gwilym et al, 2009). In OA hip, MRI shows reduced gray matter density in ACC, DLPFC, IC, and brain stem (along with some other areas). When the nociceptive focus is removed by hip replacement surgery (the only form of chronic pain which can be so “cured”) there is increase in the density of most regions (Rodriguez-Raecke et al, 2009). In headache, MRI shows reduced gray matter density in brain regions known to be part of the pain system, similar to those of chronic pain in general (but including the hypothalamus), and these “structural changes are not headache specific” (May, 2009). In persistent idiopathic facial pain, MRI demonstrates decreased gray matter volume in the ACC, IC, SI (among others), that is, in brain regions known to be part of the pain system (Schmidt-Wilcke et al, 2010). In fibromyalgia, MRI reveals decreased gray matter volume in PFC, ACC and amygdale (Burgmer et al, 2009). Other studies have demonstrated abnormalities in opioid receptors and binding, blood flow, and white matter tracts (Nabel and Gracely, 2009). Older patients with fibromyalgia show decreased gray matter accompanied by compromised white matter integrity, and younger patients showed gray matter increases (basal ganglia and insula) – suggesting brain structure and function shifting from adaptive to maladaptive in older patients (Ceko et al, 2013). In trigeminal neuralgia an MRI study of the people experiencing frequent trigeminal neuralgia confirmed gray matter loss confirmed in the frontal lobes, including the anterior cingulate cortex, but also the parahippocampus, temporal lobe and some other structures (Obermann et al, 2013). In CBP an MRI study found significant white matter hyperintensities in the following left hemisphere tracts: anterior thalamic radiation, lower cingulate, inferior longitudinal fasciculus, superior longitudinal fasciculus and superior longitudinal fasciculus to the temporal lobe (Buckalew et al, 2013). It is not appropriate to cover the speculation in detail (which is a relief). Nerve injury may cause cell membrane changes, including altered sodium, calcium and perhaps other channels, which contribute to membrane instability and painful depolarization (either spontaneously, or in response to mild stimulation). Nerve injury may also result in there dendritic sprouting and aberrant synaptic formation in the dorsal horn, such that innocuous peripheral stimuli are sent to the brain as pain information. And, connections may form between sympathetic system and pain system nerves. The decrease in gray matter volume or density may be explained by loss or atrophy of nerve cells, dendrites, synapses, or supporting cells. A role for the neuroglia in chronic pain has been proposed (Graeber and Streit, 2010). Changes in opioid, dopamine and NMDA receptors and neurotransmitters, brain chemical concentrations (NAA), prostaglandins, and various peptides (Seybold, 2009) have been described. Psychosocial factors The nervous (in particular, the limbic and autonomic components), endocrine and immune systems are intimately connected and respond to environmental events; see Chapter 34, Psychoneuroimmunology. For a discussion of somatization (the propensity of a patient to experience and report physical symptoms that have no pathophysiological explanation, to misattribute them to disease, and to seek medical attention for them) see chapter 22, Somatization. The same process applies when only minor physical abnormalities are present or suspected. The biopsychosocial model has been given a structural underpinning. Rome and Rome (2000) speculate that disturbing early life experiences lead to plastic brain changes which predispose the individual to pain, by sensitization of corticolimbic structures. It has been proposed that some hard working individuals with limited coping strategies may be able to cope and achieve a sense of self-worth and status (within their family and community) through their work, but when injury interrupts their ability to work (their Pridmore S. Muscle tension increases with both anxiety and pain, and exacerbates pain.
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