16-bit a/d system optotrak data acquisition unit ii  (Northern Digital)

Journal: Cerebellum (London, England)

Article Title: Making sense of cerebellar contributions to perceptual and motor adaptation

doi: 10.1007/s12311-017-0879-0

Figure Lengend Snippet: Experimental paradigm and setup for part one of the experiment. A: Experimental paradigm. White blocks indicate tied-belt walking (both legs 0.4 m/s), light gray blocks indicate split-belt walking (0.4:0.8 m/s), and dark gray blocks indicate the leg speed perception task (see Methods for task details). Participants performed three baseline walking and leg speed perception tasks, followed by 15 minutes of split-belt adaptation. Two-thirds of the way through the adaptation block, there was a 10 second “catch” trial where belts returned to tied-belt conditions. After adaptation, participants performed six leg speed perception tasks separated by five tied-belt walking blocks of increasing length. B: Leg speed perception task setup. Participants were asked to walk on the treadmill and use a keypad to actively control the speed of the right leg to match that of the left leg, which was fixed at 0.4 m/s. Optotrak marker locations are indicated by blue circles. Participants wore headphones that played white noise to cancel auditory treadmill cues and a cloth drape to eliminate visual cues of the feet.

Article Snippet: Optotrak Motion Analysis Kinematic data were collected during walking at 100 Hz using Optotrak (Northern Digital, Waterloo, ON, Canada).

Techniques: Blocking Assay, Control, Marker