About the book
The pharynx is a special structure in the human body. The pharynx is a conical passage connecting the oral cavity and nasal cavity to the junction of the esophagus and trachea. Besides, there is another passage, called the Eustachian tube or pharyngotympanic tube, which links the nasopharynx to the middle ear and it allows air pressure in the middle ear cavity to be equalized. The pharynx moves food or water from the mouth to the esophagus and also moves air from the nasal and oral cavities to the larynx. The larynx is a triangle-shaped box that consists largely of cartilages with surrounding structures, which is essential for phonation. Therefore, the pharynx plays an important role involved in both the respiratory and digestive systems. In other words, the pharynx is an incredibly dynamic rendezvous site of gas(air), liquid(water), and solid(food).
Although the pharynx is relatively small compared to other organ systems, a person's basic life will be affected greatly without well functional pharynx. For example, obstructive sleep apnea syndrome, the most common sleep-related breathing disorder, is characterized by repetitive collapse and closing of the pharynx during sleep. The recurrent episodes of apneas or hypopneas during sleep may interfere with restorative sleep in combination with disturbances in blood oxygenation. And these are possible negative consequences to health and quality of life. Besides, there are some conditions that can cause the pharynx and larynx to not function properly, such as digestion, respiration, or phonation.
Based on these concepts, the book incorporates updated developments as well as future perspectives in the ever-expanding field of the pharynx. Besides, this book will be a great reference for otolaryngologists, pulmonologists, gastroenterologists, pediatricians, neurologists, rehabilitation physicians, speech-language pathologists, audiologists, specialists in sleep medicine, researchers in clinical and basic medicine, experts in science and technology.