Related Experiment Video
Updated: Jul 1, 2026
06:04
Functional Mapping with Simultaneous MEG and EEG
Published on: June 14, 2010
18.0K
Neurophysiological evidence of single-shot semantic mapping in the developing brain
Marina J Vasilyeva1, Veronika M Knyazeva1, Elena D Artemenko2
1Department of Higher Nervous Activity and Psychophysiology, Faculty of Biology, Saint Petersburg State University, Saint Petersburg, Russia.
Frontiers in Human Neuroscience
|August 14, 2025
Summary
Children rapidly learn new words through fast mapping (FM), a brain process involving quick word-to-meaning connections. This study reveals early N400 brainwave patterns in right temporal cortices, showing how the developing brain quickly forms new word memories.
Area of Science:
- Developmental neuroscience
- Cognitive psychology
- Neurobiology of language
Background:
- The developing brain's capacity for rapid vocabulary acquisition is remarkable.
- Fast mapping (FM) enables children to link new words to meanings after single exposures.
- The precise neurophysiological underpinnings of FM remain unclear.
Purpose of the Study:
- To investigate the brain dynamics of fast mapping in preschool children.
- To identify the cortical mechanisms supporting rapid word learning.
- To explore the electrophysiological correlates of single-shot semantic learning.
Main Methods:
- Utilized event-related potentials (ERPs) to measure brain activity.
- Employed a single-shot audiovisual semantic learning task with novel words and objects.
- Conducted source analysis to pinpoint brain regions involved.
Main Results:
- A single word-object exposure led to decreased brain activation, evidenced by an early N400 effect for new words.
- This N400 effect indicates rapid formation of lexicosemantic memory traces.
- Source analysis localized the effect primarily to right-hemispheric temporal cortices.
Conclusions:
- Electrophysiological evidence supports a specific mechanism for rapid word integration in the developing brain.
- The findings highlight the role of right temporal cortices in early speech processing and word acquisition.
- This process facilitates efficient native language mastery in young children.
Related Concept Videos
02:47The Synapse
Neurons communicate with one another by passing on their electrical signals to other neurons. A synapse is the location where two neurons meet to exchange signals. At the synapse, the neuron that sends the signal is called the presynaptic cell, while the neuron that receives the message is called the postsynaptic cell. Note that most neurons can be both presynaptic and postsynaptic, as they both transmit and receive information.
01:14Action Potential
Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
01:10Higher Mental Functions of the Brain: Language
Language is a system of communication that allows the expression of thoughts, ideas, and feelings. The brain processes language in both hemispheres.
Language formation and comprehension take place in the dominant hemisphere. The dominant hemisphere is responsible for understanding the meaning of spoken, written, or sign language, as well as the ability to communicate. For most people, the left hemisphere is the dominant one. The right hemisphere, then, gives tone and emotional context to the...
Language formation and comprehension take place in the dominant hemisphere. The dominant hemisphere is responsible for understanding the meaning of spoken, written, or sign language, as well as the ability to communicate. For most people, the left hemisphere is the dominant one. The right hemisphere, then, gives tone and emotional context to the...
01:30Introduction to Biological Bases of Psychology
Biopsychology serves as a vital bridge connecting the intricate domains of biology and psychology, shedding light on how biological systems influence psychological phenomena. This field scrutinizes the biological substrates of behavior and mental processes, emphasizing the nervous system along with the roles of neurotransmitters, hormones, and genetics. It also incorporates evolutionary perspectives to explain the adaptive nature of mental functions.
The nervous system, the cornerstone of...
The nervous system, the cornerstone of...
01:28Neuronal Communication
Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...
01:01Neuroplasticity
Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.