Medicine States and stages of human sleep are defined on the basis of characteristic patterns in all of the following except: A Electrooculogram (EOG—a measure of eye-movement activity) B Electroencephalogram (EEG) C Electromyogram (EMG) D Electrocardiogram (ECG) 💡 Explanation States and stages of human sleep are defined on the basis of characteristic patterns in all of the following except: ✓ Correct Answer: D. Electrocardiogram (ECG)