Related Experiment Video
Updated: Aug 11, 2026

Quantifying Learning in Young Infants: Tracking Leg Actions During a Discovery-learning Task
Published on: June 1, 2015
Development of supination-pronation movements in normal children
Abstract:
In 219 normal children aged from 4 to 9 years it is shown that several features of hand-arm supination/pronation movements do not develop with age at the same rate. Ipsilateral synkineses as well as associated mirror movements decrease and diadochokinetic movements are performed in a more regular way. Bimanual mirrorwise movements are well performed at an early age, while bimanual alternate movements have a slower development at the ages under study. It is argued that the developmental rate of bimanual alternate movements might partly represent the maturation of interhemispheric connectivity and contributes to the clinical judgment of development in a different way from the development of unimanual movements. It is thought that each characteristic of these movements has its own nervous substrate.
More Related Videos
Related Concept Videos
Bones of the Upper Limb: Ulna
Changes in the Appendicular Skeleton with Age
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
Development of the Limb Synovial Joints
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...
Anatomical Movements
Here are some common anatomical movements:
Flexion and extension motions are in the sagittal (anterior–posterior) plane of motion. These movements take place at the shoulder, hip, elbow, knee, wrist, metacarpophalangeal,...
Muscles that Move the Forearm
Forearm Flexors
The biceps brachii, brachialis, and brachioradialis are forearm flexors. The biceps brachii is made up of two heads. Its long head originates at the supraglenoid tubercle of the scapula, whereas that of the short head is...
Muscles of the Forearm that Move the Hand and Fingers
Anterior Compartment
The anterior compartment muscles originate from the humerus. They primarily function as flexors and are also known as flexor muscles. They typically insert on the carpals, metacarpals, and phalanges. The superficial layer includes the flexor carpi radialis,...

