Wearable Devices - Unit 3

What does ECG stand for in wearable devices?

• Electrolyte Cardio

• Electromyogram

• Electroencephalogram

• Electrocardiogram

Describe the basic design principles of wearable ECG devices.

• High cost of production

• The basic design principles of wearable ECG devices include comfort, user-friendliness, accuracy, wireless connectivity, long battery life, and durability.

• Complex user interface

• Limited battery life

Explain the Electrode–Skin Interface in wearable ECG devices.

• The electrode-skin interface is the contact point where electrodes meet the skin, influencing signal quality in wearable ECG devices.

• The electrode-skin interface is solely responsible for data storage in ECG devices.

• The interface only affects the battery life of the device.

• The electrode-skin interface is irrelevant to ECG signal quality.

What does EEG stand for and what is its primary function?

• Electromyography; to assess muscle activity.

• Electroencephalography; to measure and record the electrical activity of the brain.

• Electroencephalogram; to visualize brain structure.

• Electrocardiography; to monitor heart rhythms.

Outline the basic measurement setup for wearable EEG devices.

• The basic measurement setup for wearable EEG devices includes electrodes, a headband or cap, a signal amplifier, and a data acquisition system.

• A desktop computer with a wired connection

• A pair of noise-cancelling headphones

• A smartphone app for data visualization

What is the principle behind EMG signal measurement?

• Detection of sound waves produced by muscle movement.

• Measurement of blood flow in muscles during exercise.

• Analysis of skin temperature changes during muscle activity.

• The principle behind EMG signal measurement is the detection of electrical activity generated by muscle contractions.

Differentiate between EMG and SEMG signals.

• EMG is only used in clinical settings, while SEMG is used in research.

• EMG measures brain activity, whereas SEMG measures heart activity.

• Both EMG and SEMG are invasive techniques that require needles.

• EMG is a general term for muscle electrical activity measurement, while SEMG specifically refers to non-invasive surface measurements.

What are wearable surface electrodes used for in EMG measurement?

• To measure skin temperature variations

• Wearable surface electrodes are used to measure electrical activity in muscles for EMG.

• To assess blood pressure changes

• To monitor heart rate during exercise

How is blood pressure measured using wearable devices?

• Blood pressure is measured by counting heartbeats with a wearable device.

• Wearable devices measure blood pressure using oscillometry or photoplethysmography.

• Wearable devices measure blood pressure using temperature sensors.

• Wearable devices use X-ray technology to measure blood pressure.

What types of sensors are used to monitor body temperature in wearable devices?

• Ultrasonic sensors

• Pressure sensors

• Magnetic sensors

• Thermistors, infrared sensors, and resistive temperature devices (RTDs)