ANSD

Acquired neuro-sensory dysregulation (sometimes called dysfunction) refers to a change in how the nervous system processes and integrates sensory information after a period of typical functioning. Rather than being present from early development, it emerges later due to factors such as injury, chronic stress, illness, trauma, or neurological changes. The brain and body may become less efficient at filtering, organising, or responding to sensory input (like sound, touch, light, or internal bodily signals), leading to responses that feel exaggerated, blunted, or poorly timed. It’s often understood within the broader context of nervous system regulation—how well the brain can maintain balance between stimulation and calm—and is commonly discussed alongside conditions like Post-Traumatic Stress Disorder, Autism Spectrum Disorder (though ASD is developmental rather than acquired), or after head injury or burnout.

Potential symptoms can vary widely but often include heightened sensitivity (e.g. sounds feeling too loud, lights too bright, touch uncomfortable), reduced sensitivity (not noticing pain, temperature, or body signals clearly), or inconsistent responses (fine one moment, overwhelmed the next). People may experience difficulty concentrating, irritability, fatigue from sensory overload, or a constant sense of being “on edge” or disconnected. There can also be coordination issues, clumsiness, or trouble with balance, along with emotional effects like anxiety, shutdown, or overwhelm when sensory input exceeds the system’s capacity to regulate. In some cases, internal sensations (like hunger, heartbeat, or tension) may also feel confusing or amplified, reflecting disruption in how the brain interprets signals from within the body.