![]() Moreover, the size of the hippocampus was found to correlate with the time they have been taxi drivers. It was found that the size of the hippocampus in taxi drivers was larger than in healthy controls. (2000) conducted brain scans of London taxi drivers. It was concluded that repeated co-activation makes the transmission between neurons more efficient. The activity of the receiving neuron became faster, greater and more long-lasting. They found that repeated stimulation of the receiving neuron by another neuron resulted in changes in its activity. Hebb's theory supports the notion of brain plasticity.īliss and Lomo (1973) investigated the effects of repeated co-activation of neurons in the hippocampi of rabbits. This cell assembly representing a unit of memory can be referred to as an engram.Ĭell assemblies can be strengthened through repeated activation, forming a neural pathway, a group of interconnected cells, activation of which represents information stored in long-term memory. The co-activation of a cell assembly creates a temporary trace in the brain that represents a memory. Cell assemblies involve groups of neurons that will co-activate in response to a stimulus. This strengthening of the connection between neurons was proposed to occur through neural growth, the growth of the synaptic knob at the end of the axon.Īs more neurons wire together, cell assemblies are created. Similarly, with repeated co-activation, the connections between neurons become stronger and the transmission of information between them more efficient. Stronger muscles allow us to perform certain activities more efficiently. The strengthening of connections between neurons can be compared to the growth of muscles, the more a muscle is used the more it strengthens and grows. As axons and dendrites grow they can create synapses with other neurons. The transmission in the synapse occurs through the release of neurotransmitters into the synapse. Two neurons can communicate through the synapse, a gap between an axon of one neuron and a dendrite of another. Axons are long cable-like structures that transmit signals from the neuron to other neurons. Neurones consist of a cell body (soma), an axon and dendrites.ĭendrites branch out of the cell body and receive information from other neurons. To better understand how the connections between neurons are made we need to examine the structure of neurons. Let's look in detail at the neural mechanisms for learning proposed by Hebb. His theory attempts to explain how repetition impacts neural processes associated with memory consolidation and storage. The aim of Hebb's theory was to provide a biological basis for the formation of new memories, development of skills and memory storage. Neural pathways are long-lasting and hold representations of our memories and the things we learn. Repeated activation of a cell assembly strengthens connections between the cells forming a neural pathway. Memories can be represented by a co-activation of a group of neurons. According to Hebb, as one neuron repeatedly excites another neuron, a synaptic knob grows at the end of its axon to improve the efficiency of transmission. ![]() Hebb's theory proposes a neural mechanism for learning and memory. This manifests in our ability to quickly recall information that we revised or perform actions without much effort after a period of practice. ![]() I n short, neurons that fire together, wire together. The central idea of Hebb's theory is that the process of learning, which involves a repeated co-activation of neurons, results in the strengthening of the connections between neurons and allows them to communicate more efficiently. Neural connections, Hebb's theory of learning and neuronal growthĭonald Hebb's theory focuses on the biological consequences of learning and memory. To conclude, we will delve into an evaluation of Hebb's theory of learning and neuronal growth.We will provide a summary of Hebb's theory, Hebb's theory definition, and discuss the aims of Hebb's theory of learning.First, well will discuss Hebb's theory of learning and neuronal growth.Let's take a closer look at the biological mechanisms of learning proposed by Hebb and the evidence for his theory. He proposed Hebb's theory of learning and neuronal growth. Canadian psychologist Donald Hebb theorised that as we learn, the biology of our brain changes to accommodate new information. It's been long known in psychology that the structure and functioning of the brain affect how we experience the world, but did you know that our experiences can also affect our neural structures? This process is known as brain/neuronal plasticity.
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