Cajal's neuron theory

Cajal's neuron theory states that the brain and nervous system are made up of individual, specialized cells called neurons, rather than a continuous network. He discovered that each neuron is a separate cell with its own body and extensions (axons and dendrites) that communicate with other neurons via small gaps called synapses. This idea revolutionized neuroscience by showing that information is transmitted across the brain through these discrete units, allowing complex processing and communication. In essence, the brain is like a vast network of interconnected, individual cells, rather than a single unified structure.