The human brain contains approximately 100 billion neurons, though some research suggests a closer estimate of 86 billion. These neurons are the basic functional units of the brain, responsible for processing information and transmitting signals throughout the nervous system.
While the brain itself doesn't have "nerves" in the same sense as the peripheral nervous system, it does have 12 pairs of cranial nerves that originate from the brain and extend through the face, head, and neck. These nerves are responsible for a wide variety of functions, including sensory perception, motor control, and autonomic regulation.
Important Note: The question "How many nerves are in the brain?" is a bit misleading. The brain contains billions of neurons, which are nerve cells, but not the bundles of nerve fibers called "nerves" found in the peripheral nervous system.
