VARIABILITY MUSCLE SPINDLE REGULARITY MOTONEURON MODELS POST-COVID-19 SYNDROME FREQUENCY RESPONSE CUTANEOUS MECHANORECEPTORS FORCE VARIBILITY NEUROMUSCULAR FATIGUE BICEPS BRACHII NEURAL CODING H-REFLEX APPROXIMATE ENTROPY INTERSPIKE INTERVALS POSITION CONTROL COMPUTATIONAL NEUROSCIENCE CORTICOMUSCULAR COHERENCE MOTOR NEURON SYNAPTIC INTEGRATION PYTHON TIME TO TASK FAILURE VISUAL FEEDBACK PERSISTENT INWARD CURRENT SENSORIMOTOR SYSTEM SPINAL CORD COVID-19 SIGNAL-DEPENDENT NOISE VIBROTACTILE STIMULATION CUTANEOUS VIBRATION AMYOTROPHIC LATERAL SCLEROSIS REFLEX CONDITIONING CHRONIC FATIGUE MOTOR CONTROL ELECTROMYOGRAPHY FIRST DORSAL INTEROSSEOUS MOTOR UNIT DECOMPOSITION PRESYNAPTIC INHIBITION SPINAL REFLEXES COMPLEXITY SARS-COV-2 INTRAMUSCULAR EMG ELECTROPHYSIOLOGY TDCS LONG COVID MOTOR LATERALIZATION LATERAL DOMINANCE HUMAN NEUROPHYSIOLOGY NEUROMUSCULAR MODEL SURFACE EMG NEURAL DRIVE NEUROMUSCULAR SYSTEM JOINT ANGLE