Systems and WBANs for Controlling Obesity

Table 4

Schema of food intake measuring methods.

Method	Measured parameter	Observations
Monitoring of swallowing	(1) Monitoring of sounds	Microphone placed on laryngopharynx/mastoid bone
	(2) Monitoring of motion of the larynx	Using accelerometers or magnetometers
	(3) Monitoring of changes in electric impedance across the neck at larynx level	Using electroglottograph (EGG)
Monitoring of chewing	(1) Electrical activity of jaw muscles	Using electromyography (EMG)
	(2) Sounds generated during the movements	Using a microphone placed on laryngopharynx/mastoid bone
	(3) Changes of jaw shape	Strain gauges/piezoelectric film
Monitoring of hand gestures	Monitoring hand-to-mouth gesture	Using gyroscope
Monitoring of gastric activity and physiological response to food intake	Using on-body and in-body sensors	Using on-body and in-body sensors
Monitoring of quantity and type of food	Quantity and type of food	Image processing methods
Monitoring of chemical food composition	Chemical composition of food	Spectroscopy