Errors in Figure Legends. In the Observation titled "Anterior Spinal Artery Syndrome Complicated by the Ondine Curse," published in the December issue of the ARCHIVES (2003;60:1787-1790), the legends to Figures 1, 2, and 3 were incorrect. The legends are reprinted correctly as follows. Figure 1. Axial T2-weighted magnetic resonance image shows linear hyperintensity in the anterior spinal cord, extending from C2 to C6, suggesting infarction in the territory of the anterior spinal artery. Note that the cervicobulbar junction is normal. Figure 2. Continuous central apneas in stage 2 of non–rapid eye movement sleep during spontaneous respiration. During the apneas, no thoracic or abdominal movements or intercostal muscle activity were observed. Abdom Resp indicates abdominal respirations; ECG, electrocardiogram; EMG, electromyogram; EOG, electro-oculogram; Interc, intercostal; Mylo, myloioideus muscle; Oral Nasal Resp, oral nasal respirations; and Thor Resp, thoracic respirations. Figure 3. Normal sleep architecture with slow-wave sleep and rapid eye movement sleep during mechanical ventilation. ECG indicates electrocardiogram; EMG, electromyogram; EOG, electro-oculogram; Interc, intercostal; Oral Nasal Resp, oral nasal respirations; REM, rapid eye movement; NREM, non–rapid eye movement; Thor Resp, thoracic respirations.