EEG (electroencephalogram), EEG electrodes (surface electrodes to record potential
differences between brain regions and a neutral reference points), EOG (electro-occulogram), electrode recording positions (e.g. C3, C4, E1, E2, F3, F4, M1, M2, O1, O2),
EMG (electromyogram especially chin/cheek EMG), endoscopic coblation lingual tonsillectomy, endoscopy, end-tidal carbon dioxide level (ETCO2), EOG (electro-
occulogram), EPAP/ePAP (expiratory positive airway pressure), epidemiology of sleep disorders, epoch (a measure of duration of the sleep recording that typically is 20 or 30 s
in duration), ES (excessive sleepiness, or hypersomnolence), hypersomnia, excessive daytime sleepiness), esophageal balloon, esophageal pressure, ESS (Epworth Sleepiness Scale), ETCO2 (end-tidal carbon dioxide), evidence-based sleep otorhinolaryngology, excessive sleepiness (or hypersomnolence), excessive daytime sleepiness (EDS),
excessive time in bed, expiratory positive airway pressure (EPAP), expansion sphincter pharyngoplasty, first night effect, FI (flattening index), flow limitation, expiratory
positive airway pressure (EPAP), Fairbanks, fiberoptic endoscopy, final awakening
(amount of wakefulness that occurs after the final wakeup time until the arise time i.e. lights on), final wake-up (clock time at which an individual awakens for the last time
before the arise time), first-night effect (effect of the environment and polysomnographic recording apparatus on the quality of the subjects sleep the first night of recording), flexible upper airway endoscopy, frequency (cycles per second or Hz), Fpz (nasion on EEG mapping), Friedmann, Fujita, full night PSG, FSS (fatique severity scale), functional
outcome, GABA (gamma-amniobutyric acid), gasping, genioglossal/ genioglossus advancement, genioplasty, GERD (gastroesophageal reflux disease), geriatric SDB (sleep-disordered breathing), getting into bed time (clock time when one gets into bed), GHB (gamma-hydroxybutyrate), GRD (ground), Hcrtr2 (hypocretin receptor 2 gene), HFF
(high frequency filter), HH (hypnogogic hallucinations), histogram, high impedance, hormonal effects, hormone therapy, HST (home sleep test), humidification, hybrid mask, hyoid suspension, hyomandibular suspension, hyothyroidopexy, hypercapnea,
hypercapnic CSA, hypercapnic respiratory drive, hyperoxemia, hyperventilation, hypersomnia (excessive sleepiness), HS (hypersomnolence), HS due to a medical disorder, HS due to a medication or substance, HS associated with a psychiatric disorder, hypertension, hypnagogic, hypnotic, hypocapnea, hypoglossal nerve stimulation, hypopharyngeal, hypopharynx, hypopnea (an episode of shallow breathing: see new
AASM guidelines for latest criteria), hypothyroidism, hypoventilation, hypoxemia,
hypoxia, hypoxic respiratory drive, Hz (Hertz or cycles per second), ICSD (International Classification of Sleep Disorders), IH (idiopathic hypersomnia), idiopathic central alveolar hypoventilation, II (idiopathic insomnia, primary insomnia), Ikemasu, IMF
(intermaxillary fixation), impedance, impedance meter, implants, incidence, indexes,
indices, inductive plethysmography, inion, injection snoreplastry, insomnia (difficulty in initiating and/or maintaining sleep), intercostal EMG, intermaxillary fixation (IMF), intermediary sleep stage (sometimes refers to NREM stage 2 sleep), International Classification of Sleep Disorders by AASM (3rd Edition etc.), IPAP/iPAP (inspiratory
Positive airway pressure), ISS (insufficient sleep syndrome), K complex (a sharp,
biphasic EEG wave followed by a high-voltage slow wave), K alpha (a type of
microarousal), Karolinska sleepiness scale, Kezirian, Klein-Levin syndrome, laboratory diagnosis, late-onset central hypoventilation with hypothalamic dysfunction, LMA
(laryngeal masked airway), LD/LO/LO2/LOD (lowest oxygen saturation, lowest oxygen desaturation or minimal oxygen saturation), laser surgery, LAUP (laser-assisted uvulopalatoplasty), LDTN (latero-dorsal tegmental nucleus), LGN (laleral geniculate
nucleus), latency, lateral cephalogram, lateral cephalometry, LAUP (laser-assisted uvulopalatoplasty), Le Fort I osteotomy, legal implications, levels (level 1, level 2, level 3, level 4 of the PSGs), light sleep (common term for NREM sleep stage 1 , and sometimes stage 2), lingualplasty, LMA (laryngeal masked airway), LMI (limb movement index),
long sleeper, lorazepam, LP (lateral pharyngoplasty), MA (mixed apnea), macroglossia,
MAD (mandibular advancement device), MRI (magnetic resonance imaging), Mallampati classification system, mandibular osteotomy with genioglossus advancement, mandibular