Lack of relaxation between successive stimuli in sustained muscle contraction is known as :

1. Spasm

2. Fatigue

3. Tetanus

4. Tonus

Doubtly Asked 30 Oct 2026 NEET UG 2016 Phase 1 Practice test neet Save WhatsApp Report

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Answer: 3. Tetanus

Sustained contraction caused by rapid successive stimuli, with no time to relax between them, is tetanus.

Spasm: sudden involuntary contraction of a muscle.
Fatigue: muscle fails to contract after prolonged activity because of lactic acid build-up and ATP/glycogen loss.
Tonus: slight, continuous partial contraction that keeps posture.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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