SKELETAL MUSCLE CONTRACTIONS

ISA PA TO

Neuromuscular junction

nerve muscle fiber connection.

Recruitment

 process of stimulating more motor units to increase the organ's strength of contraction.

Myographs

Instruments used to record muscle contractions.

Latent period

The phase after stimulation has occurred but during which a contraction is not yet apparent.

Contraction phase

Period during which the myogram line rises, indicating that contraction is in progress.

Relaxation phase

Period when the line falls, indicating a return to the resting state.

Trippe

When restimulation occurs soon after a twitch, each successive contraction has a larger amplitude than the previous one until a maximum plateau is reached.

Muscle fatigue

The state when the muscle can no longer sustain contractions

Wave summation

When a muscle is continually restimulated before the relaxation phase is over, causing the twitch waves to fuse together.

Incomplete tetanus

Slight relaxation is still visible between waves.

Complete tetanus

· Waves fuse completely into a single line.