Differences in center of pressure trajectory between normal and steppage gait

Area of Science:

• Biomechanics
• Neurology
• Gait Analysis

Background:

• Steppage gait, often associated with neuropathic conditions, has been primarily studied using biomechanical methods.
• Plantar pressure distribution in steppage gait remains less explored.
• This pilot study investigates center of pressure (COP) trajectory differences in neuropathic patients with steppage gait.

Purpose of the Study:

• To analyze changes in COP trajectory in patients with steppage gait.
• To compare COP trajectory between neuropathic patients and a control group.
• To evaluate the utility of force plate analysis in understanding steppage gait.

Main Methods:

• Participants included 25 males with steppage gait using drop foot braces and 20 male controls from a university.
• Ten trials of walking at self-selected speed were recorded using a force plate to collect COP data.
• COP patterns were categorized based on spatial and temporal features of displacement along the insole axes during the stance phase.

Main Results:

• The linear regression of COP trajectory showed a positive horizontal angle in the control group (4.6 ± 2.4°, p < 0.005).
• Conversely, the patient group exhibited a negative horizontal angle (-2.3 ± 1.6°, p < 0.005).
• These significant differences highlight distinct COP movement patterns between groups.

Conclusions:

• This research quantifies COP trajectory variations in steppage gait over time.
• Findings can inform the design of improved shoe soles and orthopedic devices.
• Understanding these COP changes enhances knowledge of stability in individuals with drop foot.