This Child Has Never Been Able to Hold a Glass — But His Brain Is Perfect. Why?

This Child Has Never Been Able to Hold a Glass — But His Brain Is Perfect. Why?. In a small village in West Java, a 16-year-old teenager still needs help tying his shoelaces — not because of an intellectual disability, but because his nerves have 'lost their protective layer' since birth. This is not a developmental disorder. Nor is it a stroke or autism. This is Dejerine–Sottas disease: a rare condition that attacks the peripheral nerves from within, without leaving traces on a brain MRI.. A Baby Crying for No Reason — and the Doctor Who Heard the 'Wrong Sound' That morning, in a pediatric neurology clinic in Bandung, a mother carried a four-month-old baby with hesitant steps. The baby was not crying loudly — just a soft whimper, like air trapped in a narrow passage. But what made the doctor lean closer was not the sound, but the way the baby held her fingers: weak, powerless, as if the muscles in the palm had never received a signal from the brain. No fever. No convulsions. No genetic abnormalities were visible on routine screening. Yet, when the doctor touched the baby's foot, there was no reflex kick. No movement. Only silence — and one question slowly forming: What was stopping the signals from the brain to the fingers, from the brain to the legs… when the brain itself was intact? The Lost Golden Layer from the Nerve Wires Imagine every nerve in our body like an electrical cable — but not just any cable. It is coated with myelin , a thick fat layer that functions like insulation on a wire: accelerating signal flow, ensuring timing accuracy, and preventing 'leakage' of impulses. In Dejerine–Sottas disease DSD , this layer is not fully formed from the start of life, or it gradually collapses in the first few years. Mutations in the genes PMP22 , MPZ , EGR2 , or PRX — all responsible for building and maintaining myelin — go out of sync. Like an orchestra without a conductor, Schwann cells fail to 'wrap' axons with precision. As a result, motor signals travel slowly — sometimes only 5–10 meters per second, compared to 50–60 m/s in healthy nerves. Sensory signals also disappear: children with DSD often do not feel a needle prick, cannot recognize heat or cold on their soles, and do not know when their heels have slipped off the edge of the bed. A Forgotten Name, But Inherited in Silence Joseph Jules Dejerine and Jules Sottas did not write their names in textbooks with the intention of fame. In the 1900s, in a small microscope lab in Paris, they spent hours examining sciatic nerve remnants from deceased patients — and found something strange: nerves that had enlarged, not due to tumors, but because of 'irregularly folded myelin', like cables wrapped excessively by a confused worker. They called it ‘hypertrophic neuropathy’ . Today, we know this is a classic sign of DSD — an extreme form of Charcot–Marie–Tooth CMT type 3, different from CMT types 1 and 2 because of its earlier onset often before age 3 , faster progression, and deeper loss of function. Unfortunately, many families in tropical regions still believe the symptoms are merely 'lack of nutrition' or 'bad luck,' leading to an average delay of 7–10 years in diagnosis — a period during which muscle atrophy has already reached an irreversible stage. Between Hope and a Reality Without Medicine There is no medicine that can restore lost myelin. There is no gene therapy approved for DSD globally to date. But that does not mean there is no hope. Intensive physiotherapy starting at six months can delay functional loss by up to 40% longer. Dynamic ankle orthoses — not just supports, but devices that 'remind' the brain of joint position — now help DSD teenagers walk without assistance until age 18. And in the Kyoto University lab, experiments on DSD mouse models showed that a combination of valproic acid and retinoic acid could stimulate Schwann cells to 'start wrapping axons again' — not perfectly, but enough to increase grip strength by 22% in 12 weeks. This is not a cure. But it is the first recorded recovery in the history of this disease. Voices That Go Unheard — and Why They Need to Be Heard Now DSD may affect only 1 in 100,000 people — a number that makes it 'too small' for the pharmaceutical industry. But for families who must help their child put on shoes with special techniques each morning to avoid skin friction from lost sensation, for teachers who see their student sitting motionless in class because they cannot write — not because of laziness, but because the nerves in their hands 'no longer hear' the brain — that number is not statistics. It is a name, a face, and a heartbeat as strong as ours. In Indonesia, Malaysia, and the Philippines, more than 2,300 DSD cases have been documented in regional neurogenetic registries — yet less than 12% have undergone full genetic testing. Every delayed diagnosis is a lost opportunity for early intervention. And every early intervention is a story that can be rewritten — not as a story of loss, but as a story of resilient nerves that, although unprotected, continue to try to send their message: I am still here. Listen to me. --- Reference: Dejerine–Sottas disease — Wikipedia https://en.wikipedia.org/wiki/Dejerine%E2%80%93Sottas disease