Anonymity of subjects was secured through depersonalisation of data at an early stage of data handling.
The subjects were secured to the treadmill with a safety harness during testing.
The subjects' forearm was secured to a support beam in the horizontal plane and the cuff and beam were coupled to the handle of the parallel-link direct drive air-magnet floating manipulandum (PFM) used to generate the environmental dynamics (Figure 1).
In the control subjects velum closure was secured by slow oral expiration against a resistance that ensured a minimum pressure of 5 cmH2O.
Each subject's testing foot was secured by a strap to the dynamometer with a fixed knee angle of 90°.
Verbal informed consent was secured from study subjects.
Written informed assent was secured from study subjects who were between 15 18 years of age in addition to written consent from their parents or guardians.
The optical probe was secured to the subject's head with Velcro and foam material.
Mouth-circuit breathing was secured by the subject wearing a tight nose-clip to prevent nasal ventilation.
Prior to each scanning session, the robotic interface was secured to the right forearm and hand of each subject.
