Topics:
Animal Physiology, Animal Refresher
Einthoven’s Triangle
Einthoven's triangle is related to:
- Electrocardiography (ECG) — Correct Answer
- Electromyography (EMG)
- Electroencephalography (EEG)
- Both a & b
Explanation:
Correct Answer: Electrocardiography (ECG)
Einthoven's triangle is a conceptual equilateral triangle formed by the three standard limb leads (Lead I, Lead II, Lead III) used in Electrocardiography (ECG). It was introduced by Willem Einthoven, who invented the ECG and won the Nobel Prize in 1924.
Einthoven's Triangle Details
- The three vertices of the triangle represent the right arm (RA), left arm (LA), and left leg (LL).
- Lead I: RA (−) → LA (+)
- Lead II: RA (−) → LL (+)
- Lead III: LA (−) → LL (+)
- Einthoven's Law: Lead II = Lead I + Lead III (at any instant)
ECG Components
- P wave: Atrial depolarization
- QRS complex: Ventricular depolarization
- T wave: Ventricular repolarization
Why Other Options Are Wrong
- EMG — records electrical activity of skeletal and smooth muscles; no triangle concept.
- EEG — records brain electrical activity; different electrode arrangement.
📚 About this Topic — Animal Physiology
This multiple choice question is from Animal Physiology, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Physiology to strengthen your preparation.
