Development of in-hand manipulation and relationship with activities

Area of Science:

• Developmental Pediatrics
• Motor Control
• Occupational Therapy

Background:

• In-hand manipulation is crucial for fine motor skills.
• Understanding its developmental trajectory is key for identifying potential delays.
• Previous research highlights the importance of intrinsic hand control in daily activities.

Purpose of the Study:

• To investigate the age-related progression of in-hand manipulation skills in children.
• To assess the consistency of using manipulation strategies.
• To explore the relationship between manipulation frequency and activities requiring intrinsic hand control.

Main Methods:

• 184 children aged 2–7 years were observed during specific activities.
• Three forms of in-hand manipulation (rotation, finger-to-palm, palm-to-finger translation) were analyzed.
• Object manipulation (spoon, buttons, crayons) and strategy use were recorded.

Main Results:

• The frequency of two in-hand manipulation types increased with age, showing uneven developmental patterns.
• In-hand manipulation use as a strategy was inconsistent, even when the skill was present.
• Controlled for age, small but significant links were found between manipulation skill and activity performance.

Conclusions:

• In-hand manipulation skill maturity may influence the performance of everyday activities in typically developing children.
• These findings suggest a potential area for intervention in occupational therapy.
• Further research is needed to confirm the impact of in-hand manipulation on functional performance.