Developmental changes in shortening of pro-saccade reaction time while maintaining neck flexion position

Area of Science:

• Neuroscience
• Developmental Psychology
• Human Motor Control

Background:

• Investigated developmental changes in pro-saccade reaction time.
• Examined the effect of maintaining neck flexion on reaction time.

Purpose of the Study:

• To understand how neck flexion influences reaction time during pro-saccade tasks across different age groups.
• To identify the developmental onset and duration of neck flexion's effect on reaction time.

Main Methods:

• 135 children (3-14 years) and 29 young adults (19-23 years) participated.
• Pro-saccade reaction tasks were performed in both neck rest and neck flexion positions.
• Reaction times were measured over 30-second periods and averaged in 10-second intervals.

Main Results:

• Reaction time was longer in younger children (3-4 years) compared to older groups.
• Neck flexion's effect on shortening reaction time emerged around 11-12 years of age.
• This shortening effect was sustained longer in older age groups (11-14 years and adults).

Conclusions:

• Brain activation associated with neck flexion, leading to shorter pro-saccade reaction times, is evident from approximately 11 years onwards.
• This activation is sustained for longer durations in older children and adults.
• Developmental maturation influences the integration of neck proprioception and oculomotor control.