The anatomy and physiology of the aging larynx essay sample essay

Motion artifact on initial acquisitions may require repeated sectioning during suspended inspiration. Suspended inspiration often produces better images; however, during breath-holding, many patients do a partial or modified Valsalva, which may alter the laryngeal anatomy significantly ( Fig. 201.1 ).

During prolonged phonation of [e], arytenoid mobility can be judged and the laryngeal ventricle may be seen, and a slight distention of the pyriform sinuses may also allow better delineation of the aryepiglottic folds. 1 The added radiation dose for such information is not justified as a routine protocol.

Targeted smaller FOV images of the larynx and hypopharynx should be reconstructed at an FOV of about 10 cm and an SLT of 1.0 to 1.5 mm. In noncancer cases, sections through the larynx should be reconstructed at 1 to 2 mm SLT and 9 to 11 cm FOV.

Embryology  Development of larynx occur during the 4th week of intra uterine life  It begins as a slit like diverticulum (laryngotracheal groove) in the ventral wall of the primitive pharynx  The groove gradually deepens and its edges fuse to form a septum, this septum separates the laryngotracheal tube from the pharynx and oesophagus.