Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Structuring of early reaching movements: a longitudinal study.

C von Hofsten1

  • 1Department of Psychology, Umeå University, S-90187 Umeå, Sweden.

Journal of Motor Behavior
|December 1, 1991
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Ophthalmological outcome and visuospatial ability in very preterm children measured at 2.5 years corrected age.

Acta paediatrica (Oslo, Norway : 1992)·2013
Same author

Visual-vestibular interaction in early infancy.

Experimental brain research·2000
Same author

Predictive action in infancy: tracking and reaching for moving objects.

Cognition·1998
Same author

Eye, head and trunk control: the foundation for manual development.

Neuroscience and biobehavioral reviews·1998
Same author

The coupling of head, reach and grasp movement in nine months old infant prehension.

Scandinavian journal of psychology·1998
Same author

Development of smooth pursuit tracking in young infants.

Vision research·1997
Same journal

Preferential Cup Size and End-State Comfort in Children.

Journal of motor behavior·2026
Same journal

Expertise Modulates Anticipatory Synergy Adjustments in a Rapid Motor Skill Under Temporal Constraints.

Journal of motor behavior·2026
Same journal

A Boundary of Ideomotor Control: Semantic Labels Bias Selection but Do Not Tune Motor Execution.

Journal of motor behavior·2026
Same journal

Strategies When Choosing Between Movement Options in a Sequential Task.

Journal of motor behavior·2026
Same journal

Transcranial Direct Current Stimulation Combined with Neurofunctional Motor Training in Autistic Children: A Randomized, Sham-Controlled, Double-Blind Clinical Trial.

Journal of motor behavior·2026
Same journal

Individualized Virtual Angle Offset Training for Patients with Stroke.

Journal of motor behavior·2026
See all related articles

Infant reaching movements become more systematic and adult-like between 19 and 31 weeks of age. Trajectories become straighter, with a dominant transport unit initiating the movement and fewer action units overall.

Area of Science:

  • Developmental psychology
  • Motor control
  • Infant development

Background:

  • Understanding the developmental trajectory of reaching is crucial for assessing motor milestones.
  • Previous research has identified distinct action units within reaching movements.

Purpose of the Study:

  • To quantitatively analyze the changes in reaching movement structure in infants from 19 to 31 weeks of age.
  • To investigate the developmental progression towards adult-like reaching patterns.

Main Methods:

  • Quantitative analysis of reaching movements in 5 infants.
  • Data collection occurred at 19 weeks and every third week until 31 weeks of age.
  • Focus on action units, transport units, and trajectory characteristics.

Related Experiment Videos

Main Results:

  • Reaching movements are consistently structured into acceleration and deceleration phases.
  • A dominant transport unit, initiating the reach, becomes more systematic with age.
  • The duration of the transport unit increases, and the number of action units decreases, approaching adult patterns.
  • Reaching trajectories become progressively straighter with age.

Conclusions:

  • Infant reaching undergoes significant developmental changes between 19 and 31 weeks.
  • The developing reaching pattern shows a clear trend towards the more efficient, two-phase adult structure.
  • These findings provide insights into the maturation of motor control systems in early development.