Neural Impacts of Sanskrit and Vedic Learning

This study investigates how learning and chanting Sanskrit hymns and Vedic scriptures may influence brain structure and neurobehavioral functioning in individuals with Autism Spectrum Disorder (ASD), using a systematic review and an observational parent survey.A systematic literature review (using PubMed, Google Scholar, and NIH) synthesized findings from 16 peer-reviewed studies spanning: (i) direct Sanskrit/Vedic chanting in highly trained non-autistic priests and scholars, and (ii) interventions in autistic populations involving Vedic chants, music, rhythm-based activities, or pragmatic language therapy.In non-ASD experts, long-term Sanskrit/Vedic chanting has been associated with increased grey and white matter density, greater cortical thickness, and altered gyrification in temporal, orbitofrontal, and memory-related regions, alongside enhanced verbal memory.In autistic populations, Vedic chant programs and related rhythm-and language-based interventions have been reported to reduce anxiety and hyperactivity; improve attention, social communication, and motor coordination; and support behavioral regulation, consistent with broader literature on language learning, bilingual exposure, and neuroplasticity in ASD.To examine real-world relevance, an observational survey was administered to parents of 18 autistic children and adolescents (5-18+ years) engaged in regular Sanskrit/Vedic chanting.Parents provided retrospective before-and-after ratings across 13 health-related aspects; average scores increased across all domains, with the most notable perceived improvements in attention/focus, memory, mood, reduced anxiety/stress, and growth/adaptability.Correlational analyses suggested that greater weekly engagement and longer exposure duration were moderately associated with more favorable cognitive, emotional, and autonomic outcomes.Converging evidence from prior studies and parent-reported data suggests that the phonetic, rhythmic, and prosodic features of Sanskrit/Vedic chanting may support neuroplastic, cognitive, and emotional functioning in ASD, tentatively positioning it as a promising, low-cost, culturally rooted therapeutic candidate.However, findings are preliminary due to small, 1 heterogeneous samples, reliance on parent-reported outcomes, and limited ASD-specific neuroimaging, underscoring the need for controlled, longitudinal, mechanistic research. LITERATURE REVIEW SECTION: 1. Autism Spectrum Disorder (ASD) and Brain DifferencesAutism Spectrum Disorder (ASD) is a neurodevelopmental condition increasingly prevalent worldwide, characterized by deficits in social interaction and communication and by restricted and repetitive behaviors (Hodges, 2020).ASD occurs across all racial, ethnic, and economic groups but is diagnosed more frequently in some populations -for example, Caucasian children are more likely to receive a diagnosis than black or Hispanic children -and is more commonly identified in males.In females, autism is often underdiagnosed because symptoms may be less overt or "camouflaged" through masking (Hodges, 2020).Although both genetic and environmental influences on brain development are implicated, the precise etiology of ASD remains unclear.Neuroimaging studies show that ASD affects multiple brain systems.Cerebellar abnormalities, including reduced vermis size and decreased cerebellar grey matter volume, have been observed, and lobular cerebellar grey matter volume is often inversely related to the severity of social and communication symptoms (Bloomer, 2022).Altered cerebellar structure and reduced functional connectivity with other regions are associated with motor deficits and impaired social interaction in ASD.Abnormalities are also found within limbic and motor networks.During emotional language processing, individuals with ASD show reduced activation in limbic structures and motor regions such as the cingulate cortex, particularly when processing emotional words (Moseley, 2015).The extent of hypoactivation relates to symptom severity (e.g., Autism Spectrum Quotient scores), suggesting that diminished engagement of these circuits contributes to the emotional and social difficulties characteristic of ASD.Overall, fMRI and MRI findings indicate that ASD is associated with widespread alterations in neural connectivity, but the great heterogeneity of the spectrum makes it difficult to generalize specific neural patterns to all autistic individuals.At the molecular level, genes involved in brain development, neurotransmission, and synaptic function contribute to ASD risk, often through effects on proteins at the synapse or through broader neuronal changes (Hodges, 2020).Clinically, ASD is accompanied by a multitude of other physical and medical disorders, including gastrointestinal problems, sleep disturbances, obesity, seizures and epilepsy, anxiety, ADHD, and mood and obsessive-compulsive symptoms (Hodges, 2020).Risk is further influenced by parental and perinatal factors such as late maternal age or maternal health complications, which are associated with prematurity and increased likelihood of ASD (Hodges, 2020).Given that ASD fundamentally alters both brain structure and function, language and communication -which depend heavily on these systems -are particularly affected. 2.