Cervical computed tomography in patients with obstructive sleep apnea: influence of head elevation on the assessment of upper airway volume. Cervical computed tomography in patients with obstructive sleep apnea influence of head elevation on the assessment of upper airway volume. Positional changes of oropharyngeal structures due to gravity in the upright and supine positions.  AUTHOR'S REPLY.
. Division of Orthodontics and Dentofacial Deformities, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, India.
Shailendra Singh
SS
Rana
. Division of Orthodontics and Dentofacial Deformities, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, India.
Om Prakash
OP
Kharbanda
D006112:Gravitation; D006257:Head; D006801:Humans; D017286:Polysomnography; D012891:Sleep Apnea Syndromes; D020181:Sleep Apnea, Obstructive; D016683:Supine Position; D014054:Tomography