In order for your brain to think, you need nerve cells that can detect information about the outside world and can transmit that information to other nerve cells. It's the transmission of information, the cells talking to each other, that's the fundamental physical basis for how thinking works.
So, how does a person think?
Humans think using their brain's navigation system: Researchers combine individual threads of evidence to form a theory of human thinking. It is one of the most fundamental questions in neuroscience: How do humans think? "We believe that the brain stores information about our surroundings in so-called cognitive spaces.
Subsequently, question is, does thinking help your brain?
Yes. Thinking is good for the brain because it keep the brain cells active and makes you think better on critical situations or on regular basis. Due to this thinking capacity decreases. So, better solve puzzles or riddles to keep your mind active.
Do humans think in words?
Their research led to insights that people think in either words or images. Our preference indicated a bias in our thinking: left-brain-dominated people tend to think more in words; right-brained people tend to think more in images. Today, we ask the question and few realize it's even possible to think in words at all.
Does negative thinking affect brain?
Stress from negative thinking creates changes in the brain that may affect your likelihood of mental disorders such as anxiety, depression, ADHD, schizophrenia and mood disorders. It is believed that the disruption in connections affects both your mood and your memories of the associations with that mood.