Sensory Processing Disorder: Rehabilitation Case #164

This case is won by what is missing, not by what is present. The presenting picture — a child who walks out of assembly, eats lunch away from the hall, and cannot bear seams, labels, haircuts or mixed textures — is a sensory over-responsivity picture, and over-responsivity is the first of the three recognised modulation patterns, alongside under-responsivity or poor registration and sensory seeking. But sensory over-responsivity by itself names nothing, because it sits inside several other conditions. Something like 90 to 95 percent of children with autism have sensory processing difficulties, which is precisely why the sensory findings alone cannot carry a diagnosis; that is the trap in clue 2. The work is done in clues 3 and 4, where each alternative is examined and fails. Autism spectrum disorder requires deficits in social communication together with restricted, repetitive behaviour, and he has neither: two close friends, initiated play, shared interests, ordinary gesture and eye contact, age-appropriate pretend play, no restricted interests, no repetitive mannerisms. Attention-deficit/hyperactivity disorder is excluded by 25 minutes of sustained seated attention with no impulsivity and teacher ratings below threshold — the leaving is not distractibility, because he goes at specific moments and returns. Hearing loss is excluded by a normal audiogram, which matters because a child who avoids the noisiest room in the school is a reasonable audiology referral. Anxiety is excluded by easy separation, no performance worry and no school refusal; and the timing in clue 5 makes the point more sharply than any screening tool would. He covers his ears before the bell, which shows he has learned exactly which stimulus is coming, and he settles within a minute of leaving. Anxiety does not switch off when you step through a door. Removing the stimulus removes the problem, and that is the signature of a modulation difficulty rather than an emotional disorder. The questionnaire then localises it: a definite difference in the auditory and tactile sections with typical movement and visual scores, matching the history exactly — noise and touch, not movement or light. The honest part of this case belongs in the debrief rather than the clues, and it is worth stating plainly. This label is not a DSM-5 diagnosis, and the American Academy of Pediatrics clinical report advises that paediatricians should not use it as one, because no universally accepted diagnostic framework exists — and that where sensory symptoms appear, autism, attention-deficit/hyperactivity disorder, developmental coordination disorder and anxiety must be considered and evaluated first. This case does exactly that and finds them absent, which is the only circumstance in which the label carries any information at all. Within occupational therapy the construct comes from Ayres Sensory Integration, developed in the 1970s on the premise that intersensory integration underpins function, and it is assessed through caregiver interview, records review, structured observation and a sensory profile measure — the four things done here. The same paediatric report accepts sensory-based occupational therapy as one component of a comprehensive plan while noting the evidence is limited and inconclusive, which is a fair description of where the field stands. For practice, the useful conclusion is the plan rather than the label: ear defenders and an early exit from assembly, a seamless clothing trial, and a lunch arrangement that returns him to the room. An hour a day of missed class is solvable without settling the nomenclature argument.