Do minor neurological signs in children help diagnose neurodevelopmental conditions?
Minor neurological signs (MNS), also called neurological soft signs, are subtle physical findings like mild coordination problems, overflow movements, or slight balance issues. They are not major neurological deficits, but they can point to differences in brain development. Research shows that MNS are common in children with neurodevelopmental conditions such as ADHD and autism. While they are not specific enough to diagnose a condition by themselves, they can support the diagnostic process when combined with other assessments.
What the research says
A 2012 study of over 1,000 children with ADHD found that neurological subtle signs (NSS) were significantly more common in those with ADHD compared to typically developing children. The study reported that total NSS scores had good diagnostic accuracy, with an area under the curve (AUC) of 0.84, meaning they could help distinguish ADHD from typical development 8. A total score of 13 or higher on a standardized neurological exam was a useful threshold for identifying ADHD 8. This suggests that MNS can be a helpful clinical tool, but they are not perfect on their own.
A mini review on minor neurological signs in child neurology and psychiatry confirms that MNS are frequently reported in neurodevelopmental and psychiatric conditions. However, the review emphasizes that MNS are not diagnostically specific—they do not point to one particular condition. Instead, they are associated with symptom severity and functional outcomes 1. The review calls for more longitudinal studies to better understand how MNS develop and how they can be used clinically 1.
Other sources touch on related topics but do not directly address MNS. For example, one study discusses genetic overlaps between brain structure and psychiatric disorders, including neurodevelopmental conditions, but does not examine neurological signs 3. Another study focuses on sleep and cognitive tasks in children with rare genetic conditions, but does not assess MNS 4. A review of omega-3 fatty acids mentions neurodevelopmental disorders like ADHD and autism, but does not discuss neurological signs 6. Similarly, a study on oral health in children with special needs includes many with neurodevelopmental disorders, but does not examine MNS 5. A review on trauma and epigenetic changes mentions neurodevelopmental pathways, but not MNS 7. A study on vestibular/ocular motor screening in youth hockey players includes some with ADHD, but its focus is on concussion testing, not MNS 9. Finally, a review on serotonin signaling discusses sex differences in neurodevelopmental conditions, but does not address neurological signs 2.
Overall, the evidence supports that MNS can be a useful part of a broader diagnostic evaluation for neurodevelopmental conditions, but they are not sufficient for diagnosis on their own.
What to ask your doctor
- Could a neurological exam for minor neurological signs be helpful for my child's evaluation?
- How do you interpret findings like coordination problems or overflow movements in the context of a possible neurodevelopmental condition?
- Are there standardized tools you use to assess minor neurological signs in children?
- If my child has minor neurological signs, what other assessments might be needed to clarify a diagnosis?
- How do minor neurological signs relate to my child's symptoms and daily functioning?
This question is drawn from common patient questions about Neurology and answered using cited medical research. We do not provide individualized advice.