Article

Walking is a complex motor behavior with a special relevance in clinical
neurology. Many neurological diseases, such as Parkinson's disease and stroke,
are characterized by gait disorders whose neurofunctional correlates are poorly
investigated. Indeed, the analysis of real walking with the standard neuroimaging
techniques poses strong challenges, and only a few studies on motor imagery or
walking observation have been performed so far.
Functional near-infrared
spectroscopy (fNIRS) is becoming an important research tool to assess functional
activity in neurological populations or for special tasks, such as walking,
because it allows investigating brain hemodynamic activity in an ecological
setting, without strong immobility constraints. A systematic review following
PRISMA guidelines was conducted on the fNIRS-based examination of gait disorders.
Twelve of the initial yield of 489 articles have been included in this review.
The lesson learnt from these studies suggest that oxy-hemoglobin levels within
the prefrontal and premotor cortices are more sensitive to compensation
strategies reflecting postural control and restoration of gait disorders.
Although this field of study is in its relative infancy, the evidence provided
encourages the translation of fNIRS in clinical practice, as it offers a unique
opportunity to explore in depth the activity of the cortical motor system during
real walking in neurological patients. We also discuss to what extent fNIRS may
be applied for assessing the effectiveness of rehabilitation programs.

Langue : ANGLAIS