chapter  4
61 Pages

Basic concepts of polysomnography channels

WithRavi Gupta, S. R. Pandi Perumal, Ahmed S. BaHammam

This chapter discusses the basic concepts for each of polysomnography channels. It also discusses the importance of audio-video recording during polysomnography. The chapter focuses on the sources of Electroencephalogram (EEG), Electroocculogram (EOG), Electromyogram (EMG) and electrocardiogram (EKG) signals. It explores mechanism of synaptic and neuromuscular communication. The chapter defines electricity, polarity, and the concept of dipole. It discusses the principle of use of amplifier and filters during polysomnography recording. The chapter analyses body position sensor. It draws the electrical potentials of cells including resting membrane potential, Inhibitory post synaptic potential, excitatory postsynaptic potential, and action potential. The chapter focuses on Understand the concept of oximetry and capnography. It discusses the mechanisms underlying the generation of various potentials. The chapter also discusses the importance of sampling rate and bit resolution. Polysomnography records a number of activities, some of them are electrical in nature and recorded as such, for example, EEG, EOG, EMG, and ECG.