What notable effect was observed in Helmholtz's experiment after blindfolding subjects?

In Hermann von Helmholtz's experiments, when subjects were blindfolded, they adapted to the directionality of the stimuli presented to them and would subsequently raise their arms at an angle corresponding to their perceived location of the object. This adaptation indicated that even without visual cues, subjects could integrate sensory information and coordinate their motor responses. The phenomenon demonstrated how perceptual processes and spatial awareness can be influenced by the body's orientation and movement.

This outcome was significant because it showcased the brain's ability to recalibrate sensory information in the absence of sight, illustrating a fundamental aspect of sensory integration and the functioning of the vestibular system. The adaptation to the angle was consistent across trials, reinforcing the idea that perception is not solely dependent on visual input but can be adjusted based on other sensory modalities and prior experiences.