PMID- 30457966
OWN - NLM
STAT- MEDLINE
DCOM- 20190206
LR  - 20190215
IS  - 1971-3274 (Electronic)
IS  - 0393-5264 (Linking)
VI  - 33
IP  - 3
DP  - 2018 Jul/Sept
TI  - The required coefficient of friction in Parkinson's disease: people with freezing 
      of gait.
PG  - 137-142
AB  - The required coefficient of friction (RCOF) is frequently reported in the 
      literature as an indicator of slip propensity, a consequence of the collisional 
      aspect of legged locomotion. Little is known about the RCOF in pathological gait. 
      Therefore, this study aimed to quantify the RCOF in subjects with Parkinson's 
      disease (PD) and freezing of gait (FOG) during the OFF-pharma phase, and to 
      investigate the interplay between RCOF parameters and ankle kinematic and kinetic 
      gait variables. Fourteen subjects with PD and 14 healthy age-matched subjects 
      were instructed to walk barefoot at self-selected speed over a force platform. 
      The RCOF curve was obtained as the ratio between the tangential and vertical 
      ground reaction forces. Then, the following discrete variables were identified: 
      P1COF (the peak at the loading response phase), V1COF (the valley at midstance 
      phase) and P2COF (the peak at push-off phase). Stepwise multiple regressions were 
      applied to observe the influence of the gait speed and ankle kinematic and 
      kinetic gait variables on RCOF variables. In subjects with PD and FOG the gait 
      speed is a predictor of the RCOF in the loading response phase; plantarflexion 
      and the plantarflexion moment are strong predictors of the RCOF in midstance; 
      finally, push-off power is a predictor of RCOF increasing in the push-off phase. 
      These results characterized the biomechanical strategies adopted by subjects with 
      PD and FOG during gait in order to avoid falls.
FAU - Rozin Kleiner, Ana Francisca
AU  - Rozin Kleiner AF
FAU - Cubillos, Diana M
AU  - Cubillos DM
FAU - Pinto, C
AU  - Pinto C
FAU - Salazar, A P
AU  - Salazar AP
FAU - Marchese, R R
AU  - Marchese RR
FAU - Barros, R M L
AU  - Barros RML
FAU - Galli, M
AU  - Galli M
FAU - Pagnussat, A S
AU  - Pagnussat AS
LA  - eng
PT  - Journal Article
PL  - Italy
TA  - Funct Neurol
JT  - Functional neurology
JID - 8707746
SB  - IM
MH  - Aged
MH  - Biomechanical Phenomena
MH  - Female
MH  - *Friction
MH  - *Gait
MH  - Humans
MH  - Male
MH  - Middle Aged
MH  - Parkinson Disease/*physiopathology
EDAT- 2018/11/21 06:00
MHDA- 2019/02/07 06:00
CRDT- 2018/11/21 06:00
PHST- 2018/11/21 06:00 [entrez]
PHST- 2018/11/21 06:00 [pubmed]
PHST- 2019/02/07 06:00 [medline]
AID - 8775 [pii]
PST - ppublish
SO  - Funct Neurol. 2018 Jul/Sept;33(3):137-142.