The corpus callosum is the bundle of fibers projecting from one hemisphere, or side, or the brain to the other.
The cranial nerves are located outside of the brain and skull. These nerves come right from the brain and brain stem.
The nerves from the left side of the body cross over to the right side of the brain at the level of the brainstem in a structure called the medulla oblongata. This process is known as decussation, which allows for information from one side of the body to be processed in the opposite hemisphere of the brain.
messages to the brain will be canceled and your body won't work right.
The eyes (vision), ears (hearing), nose (smell), and tongue (taste) send nerves directly to the brain to process sensory information. These sense organs have specialized receptors that detect stimuli from the environment and convert them into signals that are transmitted to the brain for interpretation.
The physical reason is that the nerves cross over each other inside the brain, and nerves on the right side of the brain cross to run down the left side of the body, etc. Nobody really knows exactly why this evolved.
Yes, the nerves projecting from each hemisphere cross at the medulla, causing the left side of the brain to control movement in the right of the body, and vice versa.
the basic functional unit of the nervous system is the neuron.
Yes, in most mammals, the left side of the body is controlled by the right side of the brain. This is due to the way the nerves are interconnected in the brain.
The optic chiasm is the point near the base of the brain where the optic nerves from each eye partially cross over to the opposite side of the brain. This crossover allows information from the left visual field to be processed in the right side of the brain, and vice versa.
The sense of smell originates from the first cranial nerves (the olfactory nerves), which sit at the base of the brain's frontal lobes, right behind the eyes and above the nose. Inhaled airborne chemicals stimulate these nerves.
There is only one place in the brain where nerves actually cross each other. I believe it is the Optic nerve and the Trochlear nerve. I'll add a picture under the weblink
Nerves send information to your brain such has if something is hot or cold. And your brain also sends messages through your nerves such has lift the arm, left leg forward, right leg up, so on and so forth