The human brain has about 100 billion neurons. Each neuron is thought to be connected to about 7,000 other neurons, so every time a specific neuron fires a signal, 7,000 other neurons get that information. Based on rough calculations, rate of 0.29 per second, as different parts of the brain fire at different rates. On multiplication of three numbers, 200,000,000,000,000 bits of information transmitted every second inside the brain. It means the brain is a powerful machine.
The human brain makes us all inherently limited in our access to information, memory, and practice. To gain information, we need to focus our attention on what we seek to learn – an ability that’s limited as we are terrible at multitasking. With limited attention comes limited input. The capacity to attend to new information is capped over vast reading.
This needs encoding information into memory. There are two major types of memory : short-term memory and long-term memory. Short-term memory includes working memory-the information you hold into your mind just for the time you need to use it. Long-term memory, on the other hand, it includes autobiographical memory, which are life events you remember, explicit memory and implicit memory, which you can tap into without any conscious thought.
Memory depends on forming new neural connections. When we age, it becomes harder for our brain to create new connections and existing connections are being overloaded with several memories. It becomes both harder to learn, remember, as we tend to start confusing events and facts.
There is a practical limit to our understanding of the world. In order to effectively use the information to form a deep understanding, you need to practice.
To infinitely expand the brain capacity, memory champions use techniques such as the method of loci (also known as mind palace), mnemonic linking (creating associations between the elements of a list), and chunking (breaking down and grouping individual pieces of information) to create new memories.
The brain has attention seeking, multi-tasking and processing limitations.