This study popped up last week and I thought it had some interesting implications.
Altering gait by way of stimulation of the plantar surface of the foot: the immediate effect of wearing textured insoles in older fallers
Conclusions - Stimulating the plantar surface of the foot by way of wearing this type of textured insole causes an immediate effect - in this case a slower, more cautious gait in older fallers. Further work is required to determine how textured insoles can be used to improve gait in older fallers.
The whole study is there for you to look through.
Anyway, what this made me think of was the value of being barefoot. So much information comes from the feet, from the sole. While shod, all that information is blunted. Barefoot there is so much more stimulation and data that can be processed by the brain to feed into the proprioceptive system.
Textured insoles are just a "stepping stone" to being barefoot. If they can help to prevent falls, maybe being barefoot....on rough rich surfaces...could do even more