Neuroscience and the human brain

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Neuroscience and the human brain

Inside our skull we have the most complex organ in the human body, the brain. Working like a command center for the nervous system, it processes information received from our senses and the body, then sends messages back to the muscles.

However, despite looking identical, the two hemispheres of the brain (linked by the corpus callosum) have very different functions:

  • The right hemisphere – governs the left side of the body and is responsible for creativity and imagination
  • The left hemisphere – governs the right side of the body, enables us to store and organize knowledge and is rational, logical and mathematical



A neuron or nerve cell is an electrically-excitable cell and one of the primary components of the nervous system. The human brain contains between 86 and 100 billion neurons.

Neurons are typically classified into three types based on their function:

  • Sensory neurons – respond to stimuli such as touch, sound or light that affect the cells of the sensory organs. They then send signals to the spinal cord or brain
  • Motor neurons – receive signals from the brain and spinal cord to control everything from muscle contractions to glandular output
  • Interneurons – connect neurons to other neurons within the same region of the brain or spinal cord. A group of connected neurons is called a neural circuit


Mirror neurons and attention

Mirror neurons were discovered in the 1960s but it wasn’t until the 90s that we truly understood what they were for. We now know there is a link between ‘what we think’ and ‘what happens to us in life’ because we convey our thoughts and beliefs, either consciously (verbal and para-verbal) or unconsciously (non-verbal).

Attention enables us to process information and make decisions, but to be able to concentrate on something, we first need to know something about what we are perceiving. Concentrating in this context means choosing (unconsciously) what we want to perceive.

We are constantly triggering other people to have thoughts, feelings, emotions and reactions to who we are and what we do. We are also sending unconscious messages to the people around us and these produce positive or negative patterns, depending on our emotional state that help us create our reality. It’s as if we unwittingly pass on invisible viruses to other people that affects them and the reality we experience.


Understanding emotions

The words emotion, motivation and movement all have the same root, because they come from the Latin word motus meaning movement. Emotion is a movement that disturbs our body, whilst motivation means we want to move towards a goal.

Emotions trigger action, so desire pushes us forward whereas anger, aggression, distress and fear cause us to flee or freeze on the spot. But rage, fear and panic can lead to suffering, because we generate these three emotions in stressful situations or ones of excessive pressure.

When we feel trust and empathy, they produce oxytocin, also known as the love hormone. Under the influence of oxytocin, we are more generous, selfless and considerate of others. This hormone has a virtuous effect, with the more oxytocin we secrete, the more trusting we are so we secrete more oxytocin.

These four emotional circuits determine the choices we make. As a result, the better we understand our emotions, the more easily we can understand our decisions and actions.


Further reading:

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Image: Thanks to Karlis Reimanis for sharing their work on Unsplash.

Please note – Our blog post can only be shared if you link to this original source: (cc) – 2023

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