Phenotype details |
onset infancy/childhood; MRC muscle strength neck neck flexors/extensors 4-; MRC muscle strength upper limbs 4+ proximally, 5 distally; MRC muscle strength lower limbs hip flexion 3 on right, 4- on left, hip adductors 4-, hip abduction 5, knee flexion/extension 5, ankle dorsiflexion 3+, plantar flexion 5 ; no facial weakness; calf pseudohypertrophy; no scoliosis; no contractures, joint laxity; forced vital capacity normal; no sleep apnoea; no cognitive impairment; no cardiac involvement; normal CK level |