Early synapsids neurosensory diversity revealed by CT and synchrotron scanning

Non-mammaliaform synapsids (NMS) represent the closest relatives of today's mammals among the early amniotes. Exploring their brain and nervous system is key to understanding how mammals evolved. Here, using CT and Synchrotron scanning, we document for the first time three extreme cases of neurosensory and behavioral adaptations that probe into the wide range of unexpected NMS paleoneurological diversity. First, we describe adaptations to low-frequency hearing and low-light conditions in the non-mammalian cynodont Cistecynodon parvus, supporting adaptations to an obligatory fossorial lifestyle. Second, we describe the uniquely complex and three-dimensional maxillary canal morphology of the biarmosuchian Pachydectes elsi, which suggests that it may have used its cranial bosses for display or low-energy combat. Finally, we introduce a paleopathology found in the skull of Moschognathus whaitsi. Since the specimen was not fully grown, this condition suggests the possibility that this species might have engaged in playful fighting as juveniles-a behavior that is both social and structured. Additionally, this paper discusses other evidence that could indicate that tapinocephalid dinocephalians were social animals, living and interacting closely with one another. Altogether, these examples evidence the wide range of diversity of neurological structures and complex behavior in NMS.

Effect of a multifaceted intervention on documentation of vital signs and staff communication regarding deteriorating paediatric patients

AIM

To evaluate the impact of newly designed Paediatric Early Warning Scores and an accompanying education package, COMPASS, on the frequency of documentation of vital signs and communication between health professionals and associated medical review in deteriorating paediatric patients.

METHODS

One thousand fifty-nine patients in the pre-intervention phase and 899 in the post-intervention phase were studied. The daily frequency of documentation of vital sign measurement, incidence of health professional communication and related medical reviews following clinical deterioration of a random subgroup of 262 pre-intervention and 221 post-intervention patients were studied in detail.

RESULTS

There were no significant differences in hospital mortality, medical emergency team reviews or unplanned admissions to critical care areas between the pre-intervention and post-intervention groups. There were significant increases in the post-intervention group for the median daily frequency of documentation of respiratory effort (0.0 (0-0) to 7.8 (5.8-12.6), P < 0.001), capillary refill (0 (0-0) to 1.1 (0-3.1), P < 0.001), blood pressure (0 (0-1.1) to 0 (0-1.6), P = 0.007) and level of consciousness (0 (0-0) to 7.8 (5.8-12.0), P < 0.001) and appropriate communication concerning patient deterioration 63 (8.5%) to 216 (40.9%), P < 0.001). There was a significant reduction in the number of children fulfilling the medical emergency team criteria (102 (38.9%) to 45 (20.4), P < 0.001).

CONCLUSIONS

A multifaceted intervention for the early recognition and response to clinical deterioration in children significantly improved documentation of vital signs, communication and time to medical review.

The lifestyle of our kids (LOOK) project: outline of methods

This methods paper outlines the overall design of a community-based multidisciplinary longitudinal study with the intent to stimulate interest and communication from scientists and practitioners studying the role of physical activity in preventive medicine. In adults, lack of regular exercise is a major risk factor in the development of chronic degenerative diseases and is a major contributor to obesity, and now we have evidence that many of our children are not sufficiently active to prevent early symptoms of chronic disease. The lifestyle of our kids (LOOK) study investigates how early physical activity contributes to health and development, utilizing a longitudinal design and a cohort of eight hundred and thirty 7-8-year-old (grade 2) school children followed to age 11-12 years (grade 6), their average family income being very close to that of Australia. We will test two hypotheses, that (a) the quantity and quality of physical activity undertaken by primary school children will influence their psychological and physical health and development; (b) compared with existing practices in primary schools, a physical education program administered by visiting specialists will enhance health and development, and lead to a more positive perception of physical activity. To test the first hypothesis we will monitor all children longitudinally over the 4 years. To test the second we will involve an intervention group of 430 children who receive two 50min physical education classes every week from visiting specialists and a control group of 400 who continue with their usual primary school physical education with their class-room teachers. At the end of grades 2, 4, and 6 we will measure several areas of health and development including blood risk factors for chronic disease, cardiovascular structure and function, physical fitness, psychological characteristics and perceptions of physical activity, bone structure and strength, motor control, body composition, nutritional intake, influence of teachers and family, and academic performance.