Impairment of respiratory rhythmogenesis and sequelae of bacterial meningitis.

A 9-year-old boy with respiratory disturbance associated with medullary lesions after pneumococcal meningitis is reported. Although he lives a normal daily life, he cannot cough or sneeze. A polysomnographic study revealed a low respiration rate and an irregular respiratory rhythm not only during REM sleep but also during slow wave sleep, and marked desaturation during sleep. Respiratory function tests including CO2 response revealed normal values. Magnetic resonance imaging demonstrated bilateral small lesions in the medulla. This patient is unusual because respiratory rhythm is impaired, without decreased ventilatory capacity or CO2 response, supporting the possibility that rhythmogenetic respiratory neurons are located in a limited area of the human medulla.