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The ups and downs of amphioxus biology: a history.

The ups and downs of amphioxus biology: a history. Int J Dev Biol. 2017;61(10-11-12):575-583 Authors: Holland ND, Holland LZ Abstract Humans (at least a select few) have long known about the cephalochordate amphioxus, first as something to eat and later as a subject for scientific study. The rate of publication on these animals has waxed and waned several times. The first big surge, in the late nineteenth century, was stimulated by Darwin's evolutionary ideas and by Kowalevsky's embryologic findings suggesting that an amphioxus-like creature might have bridged the gap between the invertebrates and the vertebrates. Interest declined sharply in the early twentieth century and remained low for the next 50 years. An important contributing factor (in addition to inhibition by two world wars and the Great Depression) was the indifference of the new evolutionary synthesis toward broad phylogenetic problems like the origin of the vertebrates. Then, during the 1960s and 1970s, interest in amphioxus resurged, driven especially by increased government support for basic science as well as opportunities presented by electron microscopy. After faltering briefly in the 1980s (electron microscopists were running out of amphioxus tissues to study), a third and still-continuing period of intensive amphioxus research began in the early 1990s, stimulated by the advent of evolutionary developmental biology (evo-devo) and genomics. The volume of studies peaked in 2008 with the...
Source: International Journal of Developmental Biology - Category: Biology Tags: Int J Dev Biol Source Type: research

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CONCLUSION: Social support, gratitude and resilience are associated with higher satisfaction with life and fewer symptoms of depression. Targeting and building these factors may improve an officer's ability to address symptoms of depression. PMID: 29334848 [PubMed - in process]
Source: The International Journal of Social Psychiatry - Category: Psychiatry Authors: Tags: Int J Soc Psychiatry Source Type: research
Authors: Sharma V, Thomson M PMID: 29335267 [PubMed - in process]
Source: Canadian Medical Association Journal - Category: General Medicine Tags: CMAJ Source Type: research
Authors: Thombs BD, Kwakkenbos L, Levis AW, Benedetti A PMID: 29335262 [PubMed - in process]
Source: Canadian Medical Association Journal - Category: General Medicine Tags: CMAJ Source Type: research
Authors: Geoffroy MC, Boivin M, Arseneault L, Renaud J, Perret LC, Turecki G, Michel G, Salla J, Vitaro F, Brendgen M, Tremblay RE, Côté SM Abstract BACKGROUND: Exposure to peer victimization is relatively common. However, little is known about its developmental course and its effect on impairment associated with mental illnesses. We aimed to identify groups of children following differential trajectories of peer victimization from ages 6 to 13 years and to examine predictive associations of these trajectories with mental health in adolescence. METHODS: Participants were members of the Quebec Longi...
Source: Canadian Medical Association Journal - Category: General Medicine Tags: CMAJ Source Type: research
Medscape: Medscape Access //Burnout was reported at the highest rates by critical care physicians (48%), neurologists (48%), and family medicine doctors (47%). In a large number of specialties, 40% or more of the respondents said they felt burned out. Among oncologists, 39% reported burnout. Lower numbers — but still somewhat large — of... Survey: 42% of Physicians Report Burnout, Some Cite Depression
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums
Older adults undergoing transcatheter or surgical aortic valve replacement (TAVR or SAVR) who are depressed face increased mortality risk in the year after the procedure...
Source: Physician's First Watch current issue - Category: Primary Care Source Type: news
AbstractPurpose of the ReviewThere is a heightened risk of suicide in Autism Spectrum Disorder (ASD). An up-to-date systematic review was conducted for studies examining suicide in ASD that were published in the past 5  years.Recent FindingsFour previous systematic reviews were identified. The most recent review included studies published between 1995 and 2014. Combining data cross studies, prevalence of suicide attempts in ASD was estimated to be 7 to 47%, and suicidal ideation was 72%.SummaryThe current review included 13 studies. Compared to previous reviews, we identified a shift to the use of larger cohorts, incl...
Source: Current Developmental Disorders Reports - Category: Child Development Source Type: research
ConclusionsAs interventions aiming to improve cognitive outcomes in mood disorders receive increasing research focus, the issue of setting a cut‐off level of cognitive impairment for screening purposes becomes a priority. This analysis demonstrates important differences in samples likely to be recruited depending on the definition of cognitive impairment and begins to examine the importance of premorbid IQ in determining who is impaired.
Source: Bipolar Disorders - Category: Psychiatry Authors: Tags: ORIGINAL ARTICLE Source Type: research
(MedPage Today) -- Older adults undergoing TAVR, SAVR are worse off if they're depressed
Source: MedPage Today Psychiatry - Category: Psychiatry Source Type: news
Purpose: Roughly 11% of US adolescents experience a major depressive episode, and the majority of adolescents suffering from depression do not obtain the appropriate treatment. Primary care is an ideal location for the diagnosis of depression, however, little is known regarding treatment and follow-up of depression in this setting. Previous research has followed the course of treatment for adolescents diagnosed with depression over a three month time period, but depression is a chronic condition with a high possibility of recurrence later in life.
Source: Journal of Adolescent Health - Category: Child Development Authors: Source Type: research
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