Characteristics of the sequence effect in Parkinson's disease

The sequence effect (SE) in Parkinson's disease (PD) is progressive slowing of sequential movements. It is a feature of bradykinesia, but is separate from a general slowness without deterioration over time. It is commonly seen in PD, but its physiology is unclear. We measured general slowness and the SE separately with a computer‐based, modified Purdue pegboard in 11 patients with advanced PD. We conducted a placebo‐controlled, four‐way crossover study to learn whether levodopa and repetitive transcranial magnetic stimulation (rTMS) could improve general slowness or the SE. We also examined the correlation between the SE and clinical fatigue. Levodopa alone and rTMS alone improved general slowness, but rTMS showed no additive effect on levodopa. Levodopa alone, rTMS alone, and their combination did not alleviate the SE. There was no correlation between the SE and fatigue. This study suggests that dopaminergic dysfunction and abnormal motor cortex excitability are not the relevant mechanisms for the SE. Additionally, the SE is not a component of clinical fatigue. Further work is needed to establish the physiology and clinical relevance of the SE. © 2010 Movement Disorder Society.     

The role of the duodenal microflora as a determinant of persistent diarrhoea

It has been suggested that proliferation of enterobacteriaceae and/or anaerobes in the duodenum of some children with acute diarrhoea determines whether the episode becomes persistent. A review of published studies and the comparison of cultures of duodenal aspirates from Peruvian children with acute and persistent diarrhoea and diarrhoea-free children did not support this hypothesis. Although many children had enterobacteriaceae and/or anaerobes cultured there was no correlation with clinical and nutritional outcome. Age, nutritional status, the environment and the aetiology of the episode were determinants of the duodenal microflora independent of diarrhoea. Culture of the duodenal aspirates did not increase the yield of enteropathogens which were isolated more frequently from stools than from the duodenum. Despite the presence of a single strain or serotype of enterobacteriaceae suggesting that these bacteria were colonizing the duodenum, we were unable to demonstrate any adherence mechanisms in the majority of them. Two often bacteria with no other evidence of virulence caused diarrhoea in the RITARD rabbit model.     

Short-term psychiatric adjustment of children and their parents following meningococcal disease.

OBJECTIVE: To assess short-term changes in child and parent psychiatric status following meningococcal disease. DESIGN: Prospective cohort study; 3-month follow-up using parent, teacher, and child questionnaires. SETTING: Hospital admissions to three pediatric intensive care units and 19 general pediatric wards. PATIENTS: Sixty children aged 3-6 yrs, 60 mothers, and 45 fathers. INTERVENTIONS: We administered measures of illness severity (Glasgow Meningococcal Septicaemia Prognostic Score, days in hospital) and psychiatric morbidity (Strengths and Difficulties Questionnaires, parent and teacher versions; Impact of Event scales; General Health Questionnaire-28). MEASUREMENTS AND MAIN RESULTS: In children admitted to pediatric intensive care units, parental reports at 3-month follow-up showed a significant increase in emotional and hyperactivity symptoms and in related impairment; symptoms of posttraumatic stress disorder were present in four of 26 (15%) children >8 yrs old. Regarding the parents, 26 of 60 (43%) mothers in the total sample had questionnaire scores indicative of high risk for psychiatric disorder and 22 of 58 (48%) for posttraumatic stress disorder. In fathers there was high risk for psychiatric disorder in 11 of 45 (24%) and for posttraumatic stress disorder in 8 of 43 (19%). Severity of the child's physical condition on admission was significantly associated with hyperactivity and conduct symptoms at follow-up. Length of hospital admission was associated with psychiatric symptoms in the child and posttraumatic stress disorder symptoms in parents. There were also significant associations between psychiatric symptoms in children and parents. CONCLUSIONS: Admission of children to pediatric intensive care units for meningococcal disease is associated with an increase in and high levels of psychiatric and posttraumatic stress disorder symptoms in children and parents. Length of admission is associated with psychiatric symptoms in children and posttraumatic stress disorder symptoms in parents. Pediatric follow-up should explore psychiatric as well as physical sequelae in children and parents.     

Surgical strategies in very-low-birthweight neonates with necrotizing enterocolitis

Very-low-birthweight (VLBW) neonates are more prone to complications and death than term infants are. In a 15-year period, 19 neonates with VLBW were operated on for necrotizing enterocolitis (NEC). Indications for operation were pneumoperitoneum in 12 and deterioration of general condition in 7. Bowel resection and intestinal diversion was performed in 12, a lateral enterostomy at the site of perforation was created in 5, and 2 neonates with necrosis of the whole bowel underwent an exploratory laparotomy without any further surgical treatment. Surgical complications were found in one-third of the patients. The mortality rate was significantly higher when the ileum was affected. The survival rate was 68%. Prior to 1984 the survival rate was 37% (3/8); subsequently, it has improved to 91% (10/11) as a result of improved intensive therapy.