Sensorimotor Based Brain Computer Interface

Effect of Normalizer Adaptation on Accuracy in a Sensorimotor Based Brain-Computer Interface

Sensorimotor (also know as mu) rhythm based brain-computer interfaces (BCIs) are a tool for controlling electronic devices using only brain signals. Often, the computer software that analyzes mu-rhythm brain signals constantly adapts to the individual user's brain signals when the training target location is known. The investigators want the BCIs to be more universal, and not depend on knowing the target location. Therefore, the investigators will test the effect removing adaptation has on accuracy of using a mu-rhythm BCI.

Study Overview

• Status: Terminated
• Conditions: Healthy Volunteers
• Intervention / Treatment: Other: Brain computer Interface Mu (SMR) rhythm

• Study Type: Interventional
• Enrollment (Actual): 6
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • Michigan
    • Ann Arbor, Michigan, United States, 48109
      • University of Michigan

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Age 18 or older.
• Able to read text on a computer screen
• Able to understand and remember instructions concerning participation.

Exclusion Criteria:

• Unable give informed consent.
• Unable to understand and follow instructions.
• Have abnormal tone or uncontrolled movements in the head-and-neck that would interfere with EEG recordings.
• Known to have photosensitive epilepsy.
• Open head lesions or sores.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Basic Science
• Allocation: Randomized
• Interventional Model: Single Group Assignment
• Masking: Triple

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Mu Rhythm with adaptation	Other: Brain computer Interface Mu (SMR) rhythm; Subjects will wear an EEG cap for 1-2 hours typical per session and use the brain computer interface to operate assistive technology. Subjects will be asked to participate in 10 sessions.
Experimental: Mu Rhythm without adaptation	Other: Brain computer Interface Mu (SMR) rhythm; Subjects will wear an EEG cap for 1-2 hours typical per session and use the brain computer interface to operate assistive technology. Subjects will be asked to participate in 10 sessions.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Accuracy of a mu rhythm BCI using adaptation versus no adaptation.	Accuracy with which subjects can select one of two targets after a 3-second time period. The accuracy for a run is calculated as the % of the trials in which the correct target is selected. The average accuracy will be calculated for each of the 10 usage sessions and changes over the sessions will be tracked.	10 times over 5 weeks

Collaborators and Investigators

• Sponsor: University of Michigan
• Collaborators: Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)

Publications and helpful links

Helpful Links

• University of Michigan Direct Brain Interface Project

Study record dates

Study Major Dates

• Study Start: November 1, 2010
• Primary Completion (Actual): June 1, 2011
• Study Completion (Actual): June 1, 2011

Study Registration Dates

• First Submitted: June 16, 2014
• First Submitted That Met QC Criteria: June 18, 2014
• First Posted (Estimate): June 23, 2014

Study Record Updates

• Last Update Posted (Estimate): June 23, 2014
• Last Update Submitted That Met QC Criteria: June 18, 2014
• Last Verified: June 1, 2014

More Information

Terms related to this study

• Other Study ID Numbers: I0004; R21HD054913 (U.S. NIH Grant/Contract)