Endogenous and exogenous oxytocin modulate interpersonal motor resonance in autism: A context-dependent and person-specific approach.
Oxytocin only boosts social mirroring in autistic adults who already have high baseline oxytocin or marked social struggles.
01Research in Context
What this study did
Prinsen et al. (2025) gave one puff of oxytocin spray to autistic and neurotypical adults. They then watched tiny finger muscle twitches while people viewed hand actions on a screen. The twitch size shows how much the brain mirrors the other person’s move.
The team also checked each person’s natural oxytocin level and social difficulty score before the spray. This let them ask who, not just if, the drug helps.
What they found
Across the whole group, the spray did nothing. Yet about half of the autistic adults mirrored actions more strongly after oxytocin. These responders already had higher baseline oxytocin or bigger social struggles.
Neurotypical adults showed no change either way. The drug effect was person-specific, not diagnosis-wide.
How this fits with other research
Ellingsen et al. (2014) also used nasal oxytocin in autistic youths, but saw zero social gains after weeks of training. The kids in that study were younger and the measure was emotion skill, not motor mirroring. Together the papers show age and outcome choice matter.
Zadok et al. (2024) pooled every study on autistic and typical autonomic responses. They found no overall difference unless tasks demanded active social engagement. Jellina’s motor resonance task is exactly the kind of active social cue that can reveal small drug effects.
Conson et al. (2016) showed autistic teens’ motor imagery breaks when their own body feels awkward. Jellina extends this by showing the mirror system can still be nudged in adults, but only for some people and with chemical help.
Why it matters
If you run social skills groups, do not expect oxytocin to help every client. Screen for adults who say social rules feel hardest or who already show high oxytocin in saliva. Pair them with action-observation drills like mirroring hand games. Track who twitches more—those are the responders worth targeting.
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02At a glance
03Original abstract
Understanding and interpreting non-verbal actions are critical components of social cognition, which are often challenging for autistic individuals. Oxytocin, a neuropeptide known to modulate social behavior and enhance the salience of social stimuli, is being explored as a therapeutic option for improving social mirroring. However, its effects are mediated by context- and person-dependent factors. This study examines the impact of a single intranasal dose of oxytocin (24 IU) on interpersonal motor resonance in young adult men with and without autism. Neurophysiological assessments of corticomotor excitability were performed using transcranial magnetic stimulation while participants observed real-time hand movements displayed by an experimenter demonstrating varying social intent (i.e. showing direct vs averted gaze). While no overall effect of oxytocin on interpersonal motor resonance was observed across groups, person-specific factors significantly influenced outcomes. In the autism group, individuals with higher endogenous oxytocin levels exhibited greater motor resonance during action observation. Autistic individuals with heightened social difficulties or avoidant attachment styles showed enhanced motor resonance following oxytocin administration. These findings highlight the nuanced role of both endogenous and exogenous oxytocin in shaping neurophysiological motor resonance and emphasize the importance of individual variability in assessing oxytocin's therapeutic potential for addressing social challenges in autism.Lay abstractThis study explores how oxytocin, a hormone that influences social behaviors, affects the ability to interpret and respond to non-verbal cues, particularly in autistic adults. Understanding others' actions and intentions, often guided by observing body language and eye contact, is a critical part of social interaction. Autistic individuals frequently face challenges in these areas. Using a safe, non-invasive brain stimulation technique, the study measured participants' brain responses as they observed real-time hand movements paired with the interaction partner's direct eye contact or averted gaze. Participants included young autistic and non-autistic adult men who received a placebo and a single dose of oxytocin via nasal spray. Results showed no overall differences between the two groups in their brain responses to these movements. However, in the autism group, several factors significantly influenced the effects of oxytocin. Participants with higher natural oxytocin levels or those who reported greater social challenges showed stronger responses after oxytocin administration, particularly when observing hand movements combined with direct gaze. These findings suggest that oxytocin may enhance social understanding in autistic individuals, especially for those experiencing greater difficulties. This highlights the potential of personalized approaches when considering oxytocin as a therapeutic option to improve social interactions.
Autism : the international journal of research and practice, 2025 · doi:10.1177/13623613251335730