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Sanya Chopra

Updated on May 20, 2026•science-and-technology

How Brain Signals Control Thoughts and Actions

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2 Answers
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Nitya Sharma
Answered on May 12, 2026

The brain controls thoughts and actions through electrical signals sent between neurons. Different parts of the brain become active depending on what a person is thinking, feeling, or doing. For example, when someone decides to move their hand, the brain first sends signals to the muscles to create movement.

Emotions, memories, fear, happiness, and decision-making are all connected to brain activity. This is also why stress, sleep, and mental health affect behavior so much. Scientists still consider the brain one of the most complex organs because there is still a lot humans do not fully understand about how thinking and consciousness actually work.

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R
Rahul Mehra
Answered on Jan 17, 2018
The brain along with the spinal cord makes up the nervous system which is the body control centre. This is connected to the rest of the body by the cells called neurons. Neurons send and receive messages between the body to the brain by using electrical and chemical transmitters. This means that electrical impulses that correspond to a message are passed along with the cells, and at the end of the cell these electric impulses trigger the releases of the chemicals which move and trigger an electric impulse in the next neuron cell. This passing along of messages is called transmission. Different types of neurons send different messages: Sensory neurons bring messages about sensations, like taste, touch and smell, from the relevant part of your body or to your brain. Association Neurons are present in large quantities in your brain. They gather the information from the sensory, and decide what to do about it. Motor Neurons are the third type of neurons. They control your movement. Once the association neurons have decided what to do about what the sensory neurons told them, the association neurons tell this to the motor neurons, and this is how we respond to things.
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