Both genetic and environmental factors determine someone's personality. Genes account for between 30-50% of the determination and unique environmental experiences making up the rest.
If you are a ballet dancer or gymnast, a watch-maker or surgeon, your brain connections in the motor system will differ depending on your skills for fine movements in different parts of your body.
Light arriving from the right visual field is processed in the brain's left hemisphere. So damage to the left part of the primary visual cortex will result in blindness in the right visual field.
Our memories provide us with insight into events, knowledge of the world around us and influence our actions and behaviours – forming important aspects of our personality.
Many regions fundamental to mood are buried deep in the most primordial parts of the brain; that is, they are thought to have been among the first brain regions to develop in the human species.
When you read this text, certain regions in your brain begin working more than others. Advanced imaging allows scientists to map the brain networks responsible for understanding language.