Effect of muscle stimulation intensity on the heterogeneous function of regions within an architecturally complex muscle
Chris Tijs, Nicolai Konow, Andrew A. Biewener
Abstract
We show that muscle compartmentalization can influence whole muscle contractile properties, with slower-fibered proximal rat medial gastrocnemius undergoing larger changes in pennation angle and architectural gearing, whereas the faster-fibered distal region achieves greater peak and optimal shortening velocity, and power output. Consequently, regional variation in motor recruitment can fundamentally influence functional patterns within a single muscle.
Topics & Concepts
AnatomyStimulationSkeletal muscleCompartmentalization (fire protection)Muscle architectureMuscle contractionIntensity (physics)ChemistryBiophysicsBiologyPhysicsNeuroscienceBiochemistryEnzymeQuantum mechanicsMuscle activation and electromyography studiesSports Performance and TrainingMotor Control and Adaptation