No need to touch this: Bimanual haptic slant adaptation does not require touch.

Area of Science:

• * Neuroscience
• * Human motor control
• * Haptic perception

Background:

• * Bimanual object interaction is common, raising questions about intermanual information sharing.
• * Previous research shows curvature adaptation transfers between hands during dynamic, but not static, exploration.
• * The extent of shared adaptation during simultaneous static bimanual exploration remains unclear.

Purpose of the Study:

• * To investigate if static bimanual adaptation leads to aftereffects.
• * To determine if these aftereffects transfer to dynamic exploration modes.
• * To explore whether static bimanual adaptation is posture-based or object-based.

Main Methods:

• * Three experiments using a slant adaptation paradigm with static and dynamic haptic exploration.
• * Participants adapted to felt slanted surfaces or held hands in mid-air.
• * Aftereffects were tested across different exploration modes (static and dynamic).

Main Results:

• * Static bimanual adaptation produced aftereffects in static testing conditions.
• * Aftereffects did not transfer to any exploration mode involving dynamic movement.
• * Similar aftereffects were observed with and without a haptic surface.

Conclusions:

• * Static bimanual adaptation is primarily proprioceptive in nature.
• * Adaptation does not occur at the level of object representation.
• * Intermanual information sharing in static touch is limited and posture-dependent.