Visuomanual Vertical Prism Adaptation: Aftereffects on Visuospatial and Auditory Frequency Representations

Area of Science:

• Neuroscience
• Perception
• Sensorimotor adaptation

Background:

• Lateral prism adaptation is known to induce sensorimotor and visuospatial aftereffects.
• Research on vertical prism adaptation's aftereffects, particularly on sensory representations, is less explored.
• Previous studies indicate lateral prism adaptation affects both visuospatial and auditory perception.

Purpose of the Study:

• To investigate sensorimotor aftereffects following vertical prism adaptation.
• To examine the impact of vertical prism adaptation on vertical visuospatial representation.
• To explore vertical prism adaptation's effects on auditory frequency representation.

Main Methods:

• Participants underwent prism adaptation with upward or downward optical deviation.
• Sensorimotor aftereffects were measured using a vertical touchscreen pointing task.
• Perceptual aftereffects were assessed via visual and auditory bisection tasks.

Main Results:

• Sensorimotor aftereffects were observed in both visual and auditory tasks, opposing the optical deviation.
• Vertical prism adaptation did not produce significant aftereffects on vertical visuospatial representation.
• Adaptation to downward optical deviation led to significant changes in auditory frequency representation.

Conclusions:

• Vertical prism adaptation induces sensorimotor aftereffects and influences auditory frequency representation.
• Unlike lateral prism adaptation, vertical prism adaptation does not affect vertical visuospatial representation.
• Findings suggest a shared neural substrate for auditory processing in vertical and lateral prism adaptation, possibly involving the temporal cortex.