Glottis

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Glottis
Arytenoid cartilage
Glottis positions
MeSH	Glottis
Dorlands/Elsevier	g_08/12395255

The glottis is defined as the combination of the vocal folds and the space in between the folds (the rima glottidis).^[1]

Contents 1 Function 2 Additional images 3 See also 4 References 5 References of Glottis Simulator

[edit] Function

As the vocal cords vibrate, the resulting vibration produces a "buzzing" quality to the speech, called voice or voicing.

Sound production involving only the glottis is called glottal. English has a voiceless glottal fricative spelled "h". In many accents of English the glottal stop (made by pressing the folds together) is used as a variant allophone of the phoneme /t/ (and in some dialects, occasionally of /k/ and /p/); in some languages, this sound is a phoneme of its own.

Skilled players of the Australian didgeridoo restrict their glottal opening in order to produce the full range of timbres available on the instrument. ^[2]

The vibration produced is an essential component of voiced consonants as well as vowels. If the vocal folds are drawn apart, air flows between them causing no vibration, as in the production of voiceless consonants.

The glottis is also important in the valsalva maneuver.

• Voiced consonants include /w/, /v/, /z/, /ʒ/, /ʤ/, /ð/, /b/, /d/, and /g/.
• Voiceless consonants include /h/, /ʍ/, /f/, /s/, /ʃ/, /ʧ/, /θ/, /p/, /t/, and /k/.

[edit] Additional images

Larynx

The entrance to the larynx, viewed from behind.

The entrance to the larynx.

[edit] See also

• Phonation

[edit] References

v • d • e General anatomy of head and neck - neck (including throat) Pharynx Laryngopharynx (Piriform sinus, Pharyngeal raphe) - Esophagus Larynx Cartilages major/unpaired: Epiglottis (Vallecula) • Thyroid (Laryngeal prominence, Oblique line, Superior thyroid notch, Superior horn, Inferior horn) • Cricoid minor/paired: Arytenoid (Vocal process, Muscular process) • Corniculate • Cuneiform Ligaments/folds extrinsic ligaments: Hyoepiglottic ligament • Thyrohyoid membrane (Lateral ligament, Median ligament) • Thyroepiglottic ligament • Cricotracheal ligament intrinsic ligaments - upper: Quadrangular membrane (Aryepiglottic, Vestibular ligament/Vestibular fold) intrinsic ligaments - lower: Cricothyroid ligament (Median, Lateral/Conus elasticus, Vocal ligament/Vocal folds) Laryngeal cavity Laryngeal inlet • Vestibule • Rima vestibuli • Ventricle • Rima glottidis/Glottis • Infraglottic cavity Triangles of the neck Anterior of the neck (Muscular, Carotid, Submandibular, Submental) Posterior of the neck (Occipital, Subclavian) Suboccipital Fasciae Deep cervical fascia (Pretracheal fascia, Prevertebral fascia, Investing layer) • Carotid sheath • Alar fascia pharynx: Buccopharyngeal fascia • Pharyngobasilar fascia Palatine aponeurosis Spaces Retropharyngeal space • Danger space • Prevertebral space

[edit] References of Glottis Simulator

de Menezes Lyra R. Glottis simulator. Anesth Analg. 1999 Jun;88(6):1422-3.[1]

Smith, N Ty. Simulation in anesthesia: the merits of large simulators versus small simulators. Current Opinion in Anaesthesiology. 13(6):659-665, December 2000.