In a paper published in the journal Nature, Gyorgy Buzsaki, Professor in Neuroscience, Rustem Khazipov, a Visiting Professor from INSERM, Marseille, France, and their team of researchers contend that critical information may be provided to the sensory areas of the developing brain through an individual's own movements rather than just sensory inputs, as was previously believed. In the article, "Early motor activity drives spindle bursts in the developing somatosensory cortex," the researchers describe how they examined the relationship between movement and electrical activity in the somatosensory area of the cerebral cortex in developing rats. The cerebral cortex is largely responsible for higher brain functions which include sensation, voluntary muscle movement, thought, reasoning and memory.
Rat pups in their litter display frequent muscle twitches and non-directed limb and whole body jerks, which are similar to human fetal movements. By studying the relationship between these movements and neuronal activity in the sensory part of the cerebral cortex, the researchers determined that the information provided to the developing brain by these random movements are critical for creating the proper representation of the body in the sensory cortex. By analogy, spontaneous kicks babies perform during the late stages of pregnancy should perform the same service for the human sensor
"Brain activity can occur independently of movement, but it is useless unless it is somehow tied to the events in the surrounding world," Dr. Buzsaki notes. "What we have fo
Contact: Peter Haigney
Rutgers, the State University of New Jersey