Question

Match List I with List II.

List I	List II
A. Surface electrodes B. Macro needle electrode C. Needle electrode D. Fine wire indwelling electrodes	I. Single motor unit potential II. Large superficial muscles III. Small and deep muscle IV. Large number of motor unit

Choose the correct answer from the options given below:

• A. A-II, B-IV, C-III, D-I
• B. A-II, B-IV, C-I, D-III
• C. A-I, B-II, C-IV, D-III
• D. A-II, B-III, C-I, D-IV

Hint:

EMG rule: Surface = general activity, Needle = specific muscle, Fine wire = single motor unit

Answer 1

The Correct Option is A

Concept:
Different EMG electrodes are used based on the depth, size of muscle, and specificity of motor unit recording.

Step 1: Surface electrodes.

• Record from large superficial muscles
• Capture summated activity of multiple motor units Thus: \[ A \rightarrow II \]

Step 2: Macro needle electrodes.

• Record activity from a large number of motor units Thus: \[ B \rightarrow IV \]

Step 3: Needle electrodes.

• Used for small and deep muscles Thus: \[ C \rightarrow III \]

Step 4: Fine wire electrodes.

• Record from individual motor units Thus: \[ D \rightarrow I \]

Step 5: Final mapping.
\[ A\!-\!II,\; B\!-\!IV,\; C\!-\!III,\; D\!-\!I \] \[ \boxed{\text{Correct answer = Option (1)}} \]