Bumping this up from the NewsBot (to whom, or is it to which?, my thanks) thread.

Using wearable technology to advance Parkinson's research | Healthcare IT News

The article contains a lot of details about how 24/7 data acquisition can be used to help PwP and Parkinson's research.

As always my stance is don't leave it to the "experts": get out there and data log.

Previously, I've looked at the Arduino microcontroller. Just now, I'm looking at the BBC micro:bit. This credit card sized microcontroller, with on-board accelerometer and magnetometer, is being given free to all 11 year old school children in the UK. (The normal price is about 14 pounds.) It is hoped that this will get more people programming. The nice thing about the micro:bit is that, with the right software, it allows PwP to monitor whatever movements they are interested in.

John

John -- take a look at open shoe
OpenShoe

3d motion sensor (numbers a crunched, no post processing)
3D Motion click — board with MM715 9-axis motion module | MikroElektronika

Excellent Google Talk on Sensor Fusion from 2010 (explains the
need for number crunching from sensor)
Sensor Fusion on Android Devices: A Revolution in Motion Processing
Sensor Fusion on Android Devices: A Revolution in Motion Processing - YouTube

Andy Grove discussing big data in 2012 (motion tracking for Parkinson's)
Wired Health Conference: Andy Grove - YouTube