Effects of reinnervation of the triceps brachii on joint kinematics and electromyographic patterns of the feline forelimb during level and upslope walking.

摘要: Nerve injury in the hindlimb of cat results locomotor changes, yet these findings have not been explored a more multifunctional forelimb. Kinematics and muscle activity shoulder elbow during level upslope locomotion following reinnervation feline long head triceps brachii (TLo) were evaluated (1) paralysis [none to minimum motor (short-term effects)] (2) after function was recovered but proprioceptive feedback permanently disrupted (long-term effects). The step cycle examined three walking conditions: (0%), 25% grade (14° upslope) 50% (26.6° upslope). Measurements taken prior at time points (2 weeks, 1 month 12+ months) transecting suturing radial nerve TLo. There less yield (increased flexion) joint extensor flexion stance (E2) as increased. Substantial short-term effects observed E2) well increased by synergistic extensors, greater extension paw contact, leading altered interjoint coordination stance. Forelimb kinematics progressed back baseline 12 months. can be explained both mechanical neural factors that are functional elimination Full recovery forelimb suggests length loss is compensated other sensory sources or central drive.