| | Conditions Treatments | Muscle Strain The impulse that triggers a contraction travels deep into muscle fiber by means of what? The impulse that triggers a contraction travels deep into muscle fiber by means of transverse (or T) tubules. Muscle Strain - Related Articles What Is Rational Emotive Behavior Therapy? Sinus Infection Self Help The Effects of High Protein & a Low Carb Diet Is dendrites part of the nervous system? Why Do Liver Problems Give You Itchy Skin? Why is it dangerous for bronchitis damaged your lungs? Shin Splint Syndrome