A study comparing FES and AFO splints with 26 people who had a stroke. While no differences in walking performance were measured participants preferred walking with FES stating that it improved the stability of the effected side in weight bearing. Both devices had the same effect on walking speed but the FES was preferred.
The full article is published in J Rehabil Med. 2010 Feb;42(2):117-21.
is_transcutaneous_peroneal_stimulation_beneficial_to_patients_with_chronic_stroke_using_an_ankle_0.pdf