scholarly journals The Neuro-Mechanical Processes That Underlie Goal-Directed Medio-Lateral APA during Gait Initiation

2016 ◽  
Vol 10 ◽  
Author(s):  
Jean-Louis Honeine ◽  
Marco Schieppati ◽  
Oscar Crisafulli ◽  
Manh-Cuong Do
Keyword(s):  
Gait Initiation

Obesity-related alterations in anticipatory postural mechanisms associated with gait initiation

2020 ◽  
Vol 238 (11) ◽  
pp. 2557-2567
Author(s):  
Teddy Caderby ◽  
Nathan Caron ◽  
Chantal Verkindt ◽  
Bruno Bonazzi ◽  
Georges Dalleau ◽  
...  
Keyword(s):  
Gait Initiation

scholarly journals Facilitation of cutaneous inputs during the planning phase of gait initiation

2015 ◽  
Vol 114 (1) ◽  
pp. 301-308 ◽  
Author(s):  
Laurence Mouchnino ◽  
Aurélie Fontan ◽  
Christophe Tandonnet ◽  
Joy Perrier ◽  
Anahid H. Saradjian ◽  
...  
Keyword(s):  
Evoked Potential ◽  
Gait Initiation ◽  
Motor Execution ◽  
Movement Execution ◽  
Movement Initiation ◽  
Somatosensory Stimulation ◽  
Planning Phase ◽  
Step Initiation ◽  
Afferent Information ◽  
Afferent Inputs

It has been shown that during the planning of a voluntary movement the transmission of cutaneous afferent inputs to the somatosensory cortex is attenuated shortly before the motor output as well as during movement execution. However, it is not known whether the sensory suppression observed during the planning phase (i.e., before any movement execution) is a systemic phenomenon or whether it is dependent on movement context. For example, movements such as step initiation are controlled based on information received from cutaneous receptors in the feet. Because afferent information emerging from these receptors is critical for movement initiation, we hypothesized that suppression of these inputs may not occur during the planning phase prior to gait initiation. To examine this hypothesis we measured the cortical response to somatosensory stimulation during the planning phase of step initiation and during movement execution. Sensitivity to cutaneous stimulation was assessed by measuring the amplitude of the cortical somatosensory-evoked potential (SEP, over the Cz electrode) following electrical stimulations of the plantar sole of one foot. Two stimulations were provided during the planning phase of a step movement and two stimulations during movement execution. It was found that the P50-N80 SEP was facilitated in the early planning phase (−700 ms before motor execution) compared with when participants remained still (control standing task). This mechanism might contribute to an enhanced perception of cutaneous input leading to a more accurate setting of the forces to be exerted onto the ground to shift the body's weight toward the supporting side prior to foot-off.

Sign in / Sign up

Export Citation Format

Share Document