Direction-Specific Vestibular and Visual Modulation of Fore- and Hindlimb Reflexes in Cats*

摘要: Publisher Summary This chapter investigates the craniocaudal organization of visuospinal influences and compares to vestibulospinal effects during body tilt. The influence large visual stimuli rotating about animals' line sight on electrically elicited monosynaptic fore- hindlimb reflexes was compared with effect a 45°static Both extensor flexor were tested in forelimb hindlimb. Static tilt enhances ipsilateral up 30% inhibits lesser degree. Contralateral show reversed effects. Vestibular reflex modulation is stronger than Optokinetic roll motion also produce direction-specific modulations, but reverse directional characteristic: equal tilt, e.g., right pattern left. amount optokinetic very similar reflexes. Whereas it largely identical vestibular reflexes, latter If combined, both do not summate.