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Spots Global Cancer Trial Database for Linking Digital Smartphone Behaviour With Brain Function

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Trial Identification

Brief Title: Linking Digital Smartphone Behaviour With Brain Function

Official Title: Linking Day-to-day Digital Behaviour Captured on the Smartphone With Brain Function in Patients Undergoing Brain Surgery - the "Smart Surgery" Study

Study ID: NCT03516162

Study Description

Brief Summary: This study will thus examine daily behaviour based on smartphone use and link it to the neurological and neuropsychological status as well as to neuroradiological studies that are part of the clinical routine. The study will examine behaviour changes before and after surgery, and how this change in measured behaviour with the smartphone relates to today's "gold standard", namely professional neuropsychological examination and quantification of brain damage on imaging studies (MRI). This study is a proof-of-principle study that intends to build the basis for larger future observational studies on patients with focal or diffuse brain pathologies.

Detailed Description: Pathologies of the central nervous system (CNS), as well as their surgical treatment, may interfere with the physiological and behavioural functions of the human brain. Commonly, before and after surgical treatment, the neurosurgeon examines the patient carefully for neurological deficits and additionally asks neuropsychologists to evaluate higher cognitive functions. These examinations, however, only represent the situation at a given point in time, and currently longitudinal or continuous evaluation of physiological and behavioural functions of the human brain is highly limited. Furthermore, in the conventional examinations the complex human behaviour is reduced to very simplified scores (e.g. the NIHSS for neurological or MoCA for neuropsychological functioning). Fluctuations in physiological and behavioural functions are very likely, but are unlikely to be captured with current evaluations at single (discrete) pre- and postoperative points in time. To date, "on-line" continuous evaluation of brain function in patients undergoing (potentially risky) neurosurgical procedures has not been established. The touchscreen interface of smartphones offers a fresh avenue to capture day-to-day behaviour (engagement of finger tips) by exploiting the technology intrinsic to a smartphone. For instance, the speed of touchscreen use, the distinct behavioural contexts (compartmentalised into Apps) and the corresponding habits can be seamlessly and non-obtrusively captured. More importantly, compared with current discrete approaches of evaluation, this continuous approach can account for - and even exploit - the natural fluctuations in brain functions. Nevertheless, behavioural data from touchscreens is new to scientific exploration and various fundamental questions remain to be answered, such as what are the basic statistical features of smartphone behaviour, how does this behaviour vary from one day to another, and how does this behaviour reflect basic demographic information? This gap in our understanding of smartphone behavioural data also implies that the exact statistical methods to be employed may need to undergo adjustments. For instance, the common central tendency measure of the sample mean may be highly unstable if the parameter/s occupy a power-law distribution rather than a Poisson or Gaussian distribution. In summary, ever-new exploration of the neuroscience of touchscreen behaviour must trigger the right choice of analytical and statistical methods. The focus of this study is laid on patients with pathologies of the CNS. The investigators aim to examine both patients with diffuse and focal pathologies. In order to study diffuse pathologies, the investigators will include patients with hydrocephalus. In order to study focal pathologies, the investigators will include patients with brain tumours or arteriovenous malformations (AVMs) - which are localised and described using clinical neuroimaging. Patients will be examined before and after a neurosurgical procedure. At the "UniversitätsSpital Zürich", both patients with hydrocephalus that are scheduled for ventriculo-peritoneal (VP)-shunting and patients with brain tumours/AVMs that are scheduled for microsurgical resection routinely undergo a neurosurgical, neuropsychological and neuroradiological examination (by MRI) preoperatively and at 3 months postoperative (for clinical purpose). Patients that agree to participate in this study will install a free App (programmed by the University of Zurich (UZH) spin-off QuantActions and freely available on the Google Play store) on their smartphone that records their day-to-day physiological and behavioural status associated with use of the hand (smartphone touchscreen). The study will examine behaviour changes before and after surgery, and how this change in measured behaviour with the smartphone relates to the neuropsychological examination and quantification of brain damage on imaging studies (MRI).

Eligibility

Minimum Age: 18 Years

Eligible Ages: ADULT, OLDER_ADULT

Sex: ALL

Healthy Volunteers: No

Locations

University Hospital Zurich, Zurich, , Switzerland

Contact Details

Name: Peter Brugger, PhD

Affiliation: Neuropsychological Unit, Department of Neurology, University Hospital Zurich, Switzerland

Role: STUDY_DIRECTOR

Name: Arko Ghosh, PhD

Affiliation: Faculty of Social and Behavioural Sciences, Leiden University, Netherlands

Role: STUDY_DIRECTOR

Name: Luca Regli, MD

Affiliation: Department of Neurosurgery, University Hospital Zurich

Role: STUDY_CHAIR

Useful links and downloads for this trial

Clinicaltrials.gov

Google Search Results

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