Match List - I with List - II. Choose the correct answer from the options given below : List - I List - II A. Surface electrodes I. Single motor unit potential B. Macro needle electrode II. Large superficial muscles C. Needle electrode III. Small and deep muscle D. Fine wire indwelling electrodes IV. Large number of motor unit
Electromyography Electrode Matching
This question requires matching different types of electromyography (EMG) electrodes (List - I) with their common applications or characteristics (List - II). Understanding the function and placement of each electrode type is key to solving this.
Matching EMG Electrode Types
Here's the breakdown of the matching:
- A. Surface electrodes are placed on the skin's surface. They detect electrical activity from a broad area, making them suitable for recording from II. Large superficial muscles.
- B. Macro needle electrodes are relatively large needle electrodes. They can capture signals from a larger group of muscle fibers, thus detecting a IV. Large number of motor unit potentials.
- C. Needle electrodes (often referring to finer needle types when contrasted with macro or surface) are inserted into the muscle. They are used to isolate and record potentials from individual or small groups of muscle fibers, making them ideal for studying I. Single motor unit potential.
- D. Fine wire indwelling electrodes are very thin wires inserted directly into the muscle tissue. Their small size and deep placement allow for targeted recordings from III. Small and deep muscle areas.
Correct Matching Summary
The correct pairings based on the analysis are:
| List - I | List - II |
| A. Surface electrodes | II. Large superficial muscles |
| B. Macro needle electrode | IV. Large number of motor unit |
| C. Needle electrode | I. Single motor unit potential |
| D. Fine wire indwelling electrodes | III. Small and deep muscle |
This corresponds to option B.
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