Autism Spectrum Disorder (ASD) is a neurodevelopmental disorder affecting two main domains:

social interactions (including social communication) and stereotyped behaviors (American

Psychiatric Association, 2022). INSERM reports that about 700,000 people are affected by autism

spectrum disorders in France, of whom 100,000 are under 20 years old. Currently, 8,000 autistic

children are born each year, which is about one in every 100 people (Lord et al., 2020). Recent

evidence suggests that children with ASD exhibit structural and functional postural differences

compared to neurotypical children. Current research identifies postural instability, gait anomalies,

vestibular dysfunction, proprioceptive difficulties, oculomotor problems, sensory integration

disorders, and motor coordination deficits in this population. According to Lim et al. (2017), for

example, autistic children show less stable posture compared to neurotypical children. Other

studies have made similar measurements and observed that children with ASD have significantly

more unstable postural sway than their typically developing peers (Bharath et al., 2019; Biffi et al.,

2018; Blanche et al., 2012; Dufek et al., 2017; Kushki et al., 2014; Nobile et al., 2011). Impaired

postural control is consistently reported in patients with ASD, impacting the overall functioning of

individuals in their daily lives. Symptoms of vestibular dysfunction may include postural instability,

gait dysfunction, and impaired gaze fixation. Untreated vestibular dysfunction in children can lead

to delays in developmental milestones such as sitting and walking, as well as poor motor

coordination later in life (Miller et al., 2019). Numerous studies support the conclusion that motor

deficits are linked to the core symptoms of ASD (Beals, 2022).

The main objective of this study is to evaluate the effectiveness of the NVLife method in improving

postural imbalances and its impact on reducing the core symptoms observed in autism spectrum

disorders. The main hypothesis is that postural imbalances are one of the major causes of autism

symptomatology. The study thus aims to assess whether improvement in postural imbalances

leads to a significant reduction in symptoms associated with autism.