The Nerve

"You come to both and they need to go home to eat really quickly!" Bethany screamed. She is a small baby and is always concerned about how her mother punishes her next time. We have just been a few blocks from the beach, but I did it all so I was in a hurry. We dropped by local A & P. My mother had only one thing, only one thing. "We can not buy cookie Rachel," my fat sister called me. Her chubby hand has three bags of huge chocolate biscuits.

Cranial nerve I: nerve of the olfactory nerve. The nerve fibers from this nerve are mainly in the nasal mucosa and are called Bowman's membrane. Since this nerve is an expansion of the central nervous system, it is often expressed as a region within the brain. These nerves are the cause of your sense of smell. Cranial nerve II: optic nerve. This nerve is also considered to be an expansion of the central nervous system. The only cells in the body sensitive to light are called rods and cones. The visual image is received by a rod and a cone that are initially located behind the eye. Then the rod and the cone form synapses with the neurons of the cranial nerve II. These nerve fibers form the optic nerve from each eye. The image on the right side of each eye reaches the right side of the brain (the red line of the image below), the image on the left side of each eye reaches the left side of the brain (the blue line of the image below)

Nerve fibers attached to the rod and cone gather at the center of the retina and form the optic nerve. The nerve has about 1 million fibers used as a cable connecting the eyes and the brain. The optic nerve and the retina are actually brain extensions. The optic nerves of both eyes are gathered at the bottom of the brain. This meeting place is called an intersection. When the optic nerve reaches the chiasm, the nerve passes through and connects the fibers from the other eye. Fibers from the right side of the eye reach the right side of the brain, and the fibers reach the left side of the brain from the left side of the eyes.

The axons of the ganglion cells form the optic nerve and transmit the sensation from the eye to the brain. The optic nerves from both eyes meet with a visual crossover near the center of the cerebral cortex. The optic pathway is arranged so that the vision of two eyes within the left field of view is transmitted to the right side of the brain and the visual sense within the right field of view is transmitted to the left side of the brain. Most ganglion cell axons lead to the lateral nucleus of the thalamus. Neurons in the outer nucleus continue to return to the primary visual cortex of the occipital lobe of the brain.