Slowness of movement (bradykinesia - pronounced 'bray-dee kin-eesya') is one of the classic symptoms of Parkinson's disease. Over time, patients develop a stooped posture and a slow, shuffling walk. This gait gradually becomes erratic and unsteady, and may lead to falls.
Re: Skirt Board On Existing Stairs. Or....just lay a 1 X 12 on edge running up the stairs, resting on the tips of the treads. Scribe down to the treads the right amount to make it line up with your 4-1/4 base. Use a framing square to mark for riser cuts. Then if the risers are angled back as they sometimes are in a carpeted situation, scribe the skirt board back after it has been scribed down. This will usually require that 2 boards be connected together to cover the entire length of the stairs.
To start off this new year, I vow to never have to look up those measurements again. I decided to make a printable guide (inspired by He and She Eat Clean) that I could print and tape to the inside of a kitchen cabinet door or the pantry door. I have a feeling this little thing is going to save me a lot of hassle! You can easily have this guide to put in your kitchen, too.