Future developments in brain-machine interface research

Neuroprosthetic devices based on brain-machine interface technology hold promise for the restoration of body mobility in patients suffering from devastating motor deficits caused by brain injury, neurologic diseases and limb loss. During the last decade, considerable progress has been achieved in this multidisciplinary research, mainly in the brain-machine interface that enacts upper-limb functionality. However, a considerable number of problems need to be resolved before fully functional limb neuroprostheses can be built. To move towards developing neuroprosthetic devices for humans, brain-machine interface research has to address a number of issues related to improving the quality of neuronal recordings, achieving stable, long-term performance, and extending the brain-machine interface approach to a broad range of motor and sensory functions. Here, we review the future steps that are part of the strategic plan of the Duke University Center for Neuroengineering, and its partners, the Brazilian National Institute of Brain-Machine Interfaces and the École Polytechnique Fédérale de Lausanne (EPFL) Center for Neuroprosthetics, to bring this new technology to clinical fruition

Phase III trial of postoperative cisplatin, interferon alpha-2b, and 5-FU combined with external radiation treatment versus 5-FU alone for patients with resected pancreatic adenocarcinoma – CapRI: study protocol [ISRCTN62866759]

After surgical intervention with curative intention in specialised centres the five-year survival of patients with carcinoma of the exocrine pancreas is only 15%. The ESPAC-1 trial showed an increased five-year survival of 21% achieved with adjuvant chemotherapy. Investigators from the Virginia Mason Clinic have reported a 5-year survival rate of 55% in a phase II trial evaluating adjuvant chemotherapy, immunotherapy and external-beam radiation. DESIGN: The CapRI study is an open, controlled, prospective, randomised multi-centre phase III trial. Patients in study arm A will be treated as outpatients with 5-Fluorouracil; Cisplatin and 3 million units Interferon alpha-2b for 5 1/2 weeks combined with external beam radiation. After chemo-radiation the patients receive continuous 5-FU infusions for two more cycles. Patients in study arm B will be treated as outpatients with intravenous bolus injections of folinic acid, followed by intravenous bolus injections of 5-FU given on 5 consecutive days every 28 days for 6 cycles. A total of 110 patients with specimen-proven R0 or R1 resected pancreatic adenocarcinoma will be enrolled. An interim analysis for patient safety reasons will be done one year after start of recruitment. Evaluation of the primary endpoint will be performed two years after the last patients' enrolment. DISCUSSION: The aim of this study is to evaluate the overall survival period attained by chemo-radiotherapy including interferon alpha 2b administration with adjuvant chemotherapy. The influence of interferon alpha on the effectiveness of the patients' chemoradiation regimen, the toxicity, the disease-free interval and the quality of life are analysed. Different factors are tested in terms of their potential role as predictive markers

Datasets and R Code for Social organisation of a short-tail stingray (Bathytoshia brevicaudata) population over provisioned food

Datasets S1-S5 and R Codes S1-S3 are those used to analyse dominance hierarchy and conduct a social network analysis on a group of provisioning short-tail stingrays. These data were collected under approval from the Macquarie University Animal Ethics Committee, under ARA2014/015-7, and NSW DPI Fisheries Scientific Collection Permit P08/0010-4.4. Detailed methods can be found in the original research article: [insert link here]

A Lagrangian View of Trace Elements and Isotopes in the North Pacific

Ocean time‐series sites are influenced by both temporal variability, as in situ conditions change, as well as spatial variability, as water masses move across the fixed observation point. To remove the effect of spatial variability, this study made sub‐daily Lagrangian observations of trace elements and isotopes (Al, Sc, Mn, Fe, Co, Ni, Cu, Zn, Cd, Pb, 232Th, and 230Th) in surface water over a 12‐day period (July–August 2015) in the North Pacific near the Hawaii Ocean Time‐series Station ALOHA. Additionally, a vertical profile in the upper 250 m was analyzed. This dataset is intercalibrated with GEOTRACES standards and provides a consistent baseline for trace element studies in the oligotrophic North Pacific. No diel changes in trace elements could be resolved, although day‐to‐day variations were resolved for some elements (Fe, Cu, and Zn), which may be related to organic matter cycling or ligand availability. Pb concentrations remained relatively constant during 1997–2015, presenting a change from previous decreases. Nutrient to trace element stoichiometric ratios were compared to those observed in phytoplankton as an indication of the extent of biological trace element utilization in this ecosystem, providing a basis for future ecological trace element studies

A comparison of pancreaticoduodenectomy and duodenum-preserving head resection for the treatment of chronic pancreatitis

AbstractBackgroundFor chronic pancreatitis, European prospective trials have concluded that duodenum-preserving head resections (DPHR) are associated with less morbidity and similar pain relief and quality of life (QoL) outcomes compared with pancreaticoduodenectomy (PD). However, DPHR procedures are seldom performed in North America.MethodsPatients undergoing PD or DPHR for unremitting pain secondary to chronic pancreatitis were retrospectively identified. Quality of life was assessed cross-sectionally using the European Organization for Research and Treatment of Cancer (EORTC) Quality-of-Life Questionnaire (QLQ-C30) and pancreatic cancer-specific supplemental module (QLQ-PAN26).ResultsEighty-one patients underwent either a Whipple PD (n= 59) or a DPHR (Bern, Beger or Frey procedure, n= 22) for the treatment of pain caused by chronic pancreatitis over a 5-year period. The characteristics of patients undergoing DPHR and PD procedures were similar. Duration of procedure (360min vs. 245min), duration of hospital stay (12.0 days vs. 9.5 days) and estimated blood loss (535ml vs. 214ml) were all significantly less for DPHR patients (P < 0.05). Thirty-day morbidity and mortality, postoperative pain relief and QoL scores did not differ significantly between groups.ConclusionsDuodenum-preserving head resection is equally as effective as PD in relieving pain and improving QoL in chronic pancreatitis patients, and involves a shorter hospital stay and less blood loss