You will be shown an abstract from a biomedical research paper. Given this abstract, your task is to extract all unique entities of the following types: ["Outcome", "Participant", "Intervention"].

Please return the output as a JSON object of the format: {"Participant" : ["patients with COPD", ...], "Intervention" : ["Atenolol", ...], "Outcome" : ["blood pressure", ...]}. The keys should be entity types and values should be lists of extracted entities belonging to the corresponding type. If you cannot find entities belonging to a specific type, the value should be [].

Only output the JSON object and do not include any additional text.

Abstract:

Wrist Rehabilitation Assisted by an Electromyography-Driven Neuromuscular Electrical Stimulation Robot After Stroke . BACKGROUND Augmented physical training with assistance from robot and neuromuscular electrical stimulation ( NMES ) may introduce intensive motor improvement in chronic stroke . OBJECTIVE To compare the rehabilitation effectiveness achieved by NMES robot-assisted wrist training and that by robot-assisted training . METHODS This study was a single-blinded randomized controlled trial with a 3-month follow-up . Twenty-six hemiplegic subjects with chronic stroke were randomly assigned to receive 20-session wrist training with an electromyography ( EMG ) -driven NMES robot ( NMES robot group , n = 11 ) and with an EMG-driven robot ( robot group , n = 15 ) , completed within 7 consecutive weeks . Clinical scores , Fugl-Meyer Assessment ( FMA ) , Modified Ashworth Score ( MAS ) , and Action Research Arm Test ( ARAT ) were used to evaluate the training effects before and after the training , as well as 3 months later . An EMG parameter , muscle co-contraction index , was also applied to investigate the session-by-session variation in muscular coordination patterns during the training . RESULTS The improvement in FMA ( shoulder/elbow , wrist/hand ) obtained in the NMES robot group was more significant than the robot group ( P < .05 ) . Significant improvement in ARAT was achieved in the NMES robot group ( P < .05 ) but absent in the robot group . NMES robot-assisted training showed better performance in releasing muscle co-contraction than the robot-assisted across the training sessions ( P < .05 ) . CONCLUSIONS The NMES robot-assisted wrist training was more effective than the pure robot . The additional NMES application in the treatment could bring more improvements in the distal motor functions and faster rehabilitation progress .
{"Intervention": ["Electromyography-Driven Neuromuscular Electrical Stimulation Robot", "Augmented physical training with assistance from robot and neuromuscular electrical stimulation ( NMES )", "20-session wrist training with an electromyography ( EMG ) -driven NMES robot", "EMG-driven robot", "robot-assisted training .", "NMES robot", "NMES robot-assisted wrist training"], "Outcome": ["improvement in FMA ( shoulder/elbow , wrist/hand )", "Fugl-Meyer Assessment ( FMA )", "better performance", "releasing muscle co-contraction", "Modified Ashworth Score ( MAS )", "ARAT", "Action Research Arm Test ( ARAT )"], "Participant": ["Stroke", "hemiplegic", "Twenty-six", "chronic stroke"]}