MEDICAL PHYSIOLOGY

Detailed explanation-1: -The minimum strength required for the stimulus to initiate the response of muscle contraction is known as the threshold stimulus. No response is seen if the magnitude of the stimulus is below this threshold value.

Detailed explanation-2: -∙The threshold stimulus in muscle contraction is defined as the minimum strength which is required for the stimuli to instigate the response in a muscle contraction. ∙ If the strength of the stimulus is below the threshold stimulus there is no response seen.

Detailed explanation-3: -A Muscle Contraction Is Triggered When an Action Potential Travels Along the Nerves to the Muscles. Muscle contraction begins when the nervous system generates a signal. The signal, an impulse called an action potential, travels through a type of nerve cell called a motor neuron.

Detailed explanation-4: -This stimulus, called the maximal stimulus marks the point where all of the fibers in the muscle are stimulated and responding all-or-none. Stimuli above this maximal stimulus are called supramaximal stimuli. Stimuli below the threshold that do not initiate a mechanical response are called subthreshold stimuli.

Detailed explanation-5: -When a threshold stimulus is applied to a muscle, the muscle fibres will contract fully or will not contract at all.