Coordination Dynamics Lab Texas A&M University
Equipment Description
The main kinematic collection instrument is the OPTOTRAK® 3020 3D Camera System designed by Northern Digital Inc. (Waterloo, Canada). This provides for the collection of up to 64 infra red light emitting diodes (IREDs) that may be attached to the human body. The camera system is controlled by an independent control unit that also controls the collection of analog data with the use of Northern Digital's ODAU II (analog-to-digital device) unit. Input into the ODAU II is through a 25 pin ribbon cable that provides 16 channels of analog data collection. Currently, a 64 channel multiplexer board (AMUX-64T National Instruments, Austin TX) is attached to the ODAU II and this extends analog collection to 64 single end channels or 32 differential channels. The OPTOTRAK system is an active based marker system, that is, the markers attached to the subject have cables trailing from them that actually attach to the data collection unit. The system in our lab also has the option to pulse the IREDs using battery packs and removes the direct connection of the IREDs to the collection unit. Battery driven markers allows for the study of larger body motion without concern for interference from trailing cables. The coordination lab is also equipped with two Bertec 4550-08 force plates. The six analog signals (force xyz, moments xyz) from each plate are recorded through input channels into the multiplexer board. EMG equipment currently consists of a 4 channel Bagnoli amplifier from Delsys Inc. (Boston, MA) that is also input into the multi-plexor board. This system may use both differential surface electrodes and Double differential electrodes (to eliminate crosstalk).
Data Collection Equipment
Experimental Projects
Buchanan, J.J. & Ryu, Y.U. (in press). 1:1 and polyrhythmic temporal coordination in bimanual circle tracing. Journal of Motor Behavior.
Buchanan, J.J. & Ryu, Y.U. (2005). The interaction of tactile information and movement amplitude on a multijoint bimanual circle-tracing task: Phase transitions and loss of stability. Quarterly Journal of Experimental Psychology A: Human Performance, 58A: 769-787.
Ryu, Y.U. & Buchanan, J.J. (2004). Amplitude scaling in a bimanual circle drawing task: pattern switching and end-effector variability. Journal of Motor Behavior, 36: 265-279.
Rapid aiming: units of action
Buchanan, J.J., Park, J-H., & Shea, C.H. (2004). Systematically scaling target width: Dynamics, Planning, and Feedback. Neuroscience Letters, 367: 317-322.
Buchanan, J.J., Park, J-H., Ryu, Y.U. & Shea, C.H. (2003). Discrete and cyclical units of action in a mixed target-pair aiming task. Experimental Brain Research, 150: 473-489.
Multijoint Single limb Learning
Buchanan, J.J. (2004). Learning a single limb multi-joint coordination pattern: The impact of a mechanical constraint on the coordination dynamics of learning and transfer. Experimental Brain Research, 156: 39-54.
Posture and Balance
Buchanan, J.J. & Horak, F.B. (2003). Voluntary control of postural equilibrium patterns. Behavioral Brain Research, 143(2): 121-140.
Buchanan, J.J. & Horak, F.B. (2002). Vestibular loss disrupts control of head and trunk on a sinusoidally moving platform. Journal of Vestibular and Equilibrium Research, 11: 371-389.
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08/09/2005 10:59 AM
