Clinician scientists have always used their keen perception of human behavior to identify neurological impairments, and help diagnose brain disorders. A clinician will look at how a patient moves and interacts with them during a standard neurological exam. However to assess these functions, the clinician must rely heavily on their subjective estimate of the patient’s ability to perform behaviors that represent various functions. For example, to test visuomotor coordination, the clinician assesses the ability of a patient to touch their nose and the clinician’s finger. The test is scored on a three point scale ( 0, 1 or 2) – a necessarily coarse ordinal score to ensure reliability. Unfortunately, such coarseness makes it difficult to: identify subtle changes in sensorimotor function, such as small delays in reacting or increases in movement variability; and leads to floor and ceiling effects in the scoring system.
An article by Alberta Health Services reported: Often stroke patients undergo lengthy and repeated clinical testing. Dr. Dukelow says the KINARM can test for the same deficits in a matter of minutes. “What we find is that the robot is more sensitive in picking the deficits up in terms of movement, and we hope this will give us new insight into developing treatments,” says Dr. Dukelow. The robotic system helps to identify deficits that are sometimes difficult to pick up on a standard clinical exam, but are important for day to day function.Dr. Dukelow has now begun developing novel approaches towards helping patients recover from the effects of their stroke using the KINARM Exoskeleton Lab.
Other clinical indications: Dr. Dukelow has also used the KINARM Exoskeleton device to quantify sensorimotor impairments in chronic TBI, CP, movement disorders such as Parkinson’s (Semrau, et al, 2015) and sport concussion.
Dr. George Mochizuki, PhD, at the Sunnybrook Research Institute, in partnership with Allergan Canada and Toronto Rehab Institute, used the KINARM Exoskeleton Lab to assess the effectiveness of BOTOX® injections in the rehabilitation of stroke survivors with spasticity
A novel task has been developed to quantify spasticity and tone that is more sensitive than the Modified Ashworth Scale or Modified Tardieu Scale (Centen, et al, 2015, in preparation)
The team used the KINARM Standard Test suite to capture measures of impairment at several time points during the study. Read more on how the team is currently analyzing the effectiveness of BOTOX injections.
University of South Carolina
Dr. Troy Herter, PhD uses his KINARM End-Point Lab to quantify sensory, motor and cognitive impairments from chronic stroke, sport concussion and normal aging; and to quantify response to transcranial direct current stimulation (tDCS) therapies (Middleton, et al, 2014).
With his expertise in gaze-tracking, he is developing quantitative assessment tools for gaze-motor control, eye-hand coordination, and visual cognition using the KINARM Gaze-Tracker integrated. To give him a faster start on developing these new tools, BKIN has provided Dr. Herter with a Dexterit-E development license to allow him to develop unique Custom Task variants of the KINARM Standard Tests.
Transient Ischemic Attack
Kingston General Hospital Research Institute
Dr. Al Jin, MD PhD, is using a KINARM Exoskeleton lab to identify measurable residual impairments from transient ischemic attack.
Foothills Hospital/University of Calgary
Dr Sean Dukelow, MD PhD, applied his same desire to differentiate neurological impairments resulting from stroke to a chronic population of TBI subjects at Foothills Hospital, Calgary. He assessed visuomotor and position sense impairments with the KINARM Exoskeleton Lab in subjects with initial severities severe to mild TBI. He contrasted the KINARM measures with those of the clinical tests. Subjects with TBI demonstrated a broad range of sensory and motor deficits on robotic testing.
Notably, several subjects with TBI displayed significant deficits in one or both of the robotic tasks, despite normal scores on traditional clinical motor and cognitive assessment measures (Debert et al, 2012). For the study, Dr. Dukelow used the 9-target Visually Guided Reaching task and the 8-target Arm Position Matching task. Both tasks are now also available in shorter versions to reduce clinical time used for the test.
University Hospital, University of Cincinnati
To enable the group to conduct the study, the BKIN team had to tackle the second question first: mount 1000 pounds of hardware and electronics on to wheels with a footprint no greater than a hospital bed. The hardest requirement was figuring out how we were going to get it through any door. In a hospital setting, 34 inch doors are to be expected; BKIN’s End-Point Lab requires 48 inches. It was a real challenge, given the rough and busy environment of an ED. The creative engineers at BKIN redesigned the device and created the first “rollable” KINARM End-Point lab.
The key innovation came when the team figured out how to retract the virtual reality display.
Suspended by four hydraulic lifts when in use, the virtual reality system can be raised up and over the KINARM robots to “squeeze” the system down to the required width. In the retracted position, the system can be wheeled around the ward to the next research subject. The new rollable KINARM End-Point facilitated successful integration of the device into UC’s trauma center and provided the investigators with a novel tool to conduct active clinical research in a hospital setting.
The UC team has recently published (Subbian, et al, 2016) the findings from their first study and found that assessment with a sub-set of KINARM Standard Tests during initial presentation in the emergency department was predictive of post-concussion syndrome with high confidence: “The area under the receiver operating characteristic curve (AUC) for the entire test battery was 0.72 (95% CI 0.54 – 0.90). The AUC for tests that primarily measure visuomotor and proprioceptive performance was 0.80 (95% CI: 0.65 – 0.95) and 0.71 (95% CI: 0.53 – 0.89), respectively.” They have also published a feasibility study on the integration of the KINARM Lab into an ED setting (Subbian, et al, 2015).
Kingston General Hospital/Queen’s University
Dr. Gordon Boyd, MD PhD, a neurologist, intensive care physician and clinician-scientist, is studying brain function, how it correlates with long-term neurological recovery, and how to improve outcomes for those who have suffered from cardiac arrest. Dr. Boyd’s research is focused on predicting how patients react the first few days after a cardiac incident, and how to create tests to better gauge the level of damage to each individual by understanding how neurons in the brain react to the loss of blood and oxygen during an arrest. By doing so, he hopes to be able to develop processes and treatments in the ICU that have a significant impact on patient recovery.