Effects of auditory feedback on movements with two-segment sequence and eye-hand coordination

Area of Science:

• Neuroscience
• Motor Control
• Human Factors

Background:

• Effective planning and control of multi-segment movements are crucial for daily activities.
• Eye-hand coordination plays a vital role in executing complex motor tasks.
• Auditory feedback's impact on motor control, particularly during sequential movements, requires further investigation.

Purpose of the Study:

• To investigate how auditory feedback indicating reach progression influences the planning and control of two-segment reaching movements.
• To examine the effect of auditory reach-progression cues on eye-hand coordination during the transition between movement segments.
• To determine if auditory cues enhance performance in tasks with varying accuracy demands.

Main Methods:

• Young adults performed rapid two-segment reaching tasks under three auditory feedback conditions.
• One condition provided auditory cues signaling midway and target contact during the initial reach.
• Control conditions included random auditory timing or no auditory feedback.

Main Results:

• Auditory reach-progression cues significantly increased the accuracy of the initial reach compared to control conditions.
• Movement time, peak velocity, and time to peak velocity of the initial reach were favorably affected by the auditory cue.
• Onset latencies for gaze and reach to the second target decreased with the auditory cue, especially under higher accuracy constraints.

Conclusions:

• Auditory reach-progression feedback enhances the preplanned control of initial reaching movements.
• This feedback facilitates the verification of initial reach termination, thereby improving the initiation of subsequent movements.
• Auditory cues improve planning and control in multi-segment reaches and eye-hand coordination.