Motor and Gait

Measures of motor function and gait from performance-based tests and devices


Gait device

The Dynaport device is a small, light-weight whole-body sensor (Dynaport MT, McRoberts, The Netherlands) that is worn on a neoprene belt placed on the participant’s lower back above the sacrum in the midline at the level of anterior iliac crest. The device includes a triaxial accelerometer and triaxial gyroscope and records activity in three acceleration axes (vertical, mediolateral, anterioposterior) and three angular velocitiy axes: yaw (rotation around the vertical axis), pitch (rotation around the mediolateral axis), and roll (rotation around the anterioposterior axis).

The device records continuously during the sequence of mobility tests for each participant. Data are saved on a secure digital card at a sampling frequency of 100 Hz. The data is then reviewed by a research coordinator before being uploaded to a secure server for storage.

Prior to 2016, gait measures were collected using the Dynaport Hybrid device (McRoberts, The Netherlands).

Motor function measures

Measures of motor function

Motor function Motor function composite - Average of 10 tests
Motor dexterity Motor function partial composite: Dexterity
Motor gait Motor function partial composite: Gait
Motor hand strength Motor function partial composite: Hand strength


Unified Parkinson’s Disease Rating Scale

Parkinsonism Classification of parkinsonism based on number of parkinsonian signs present - 3 level
Parkinsonian signs Global parkinsonian summary score
Bradykinesia score Parkinsonian signs domain: Bradykinesia
Gait score Parkinsonian signs domain: Gait
Rigidity score Parkinsonian signs domain: Rigidity
Tremor score Parkinsonian signs domain: Tremor