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Ross Chezem 12/16/10 1A AP Bio Neuron Pathway Story Travis Hammenheimer will have to travel along the nerve in the finger which will lead to the median nerve. If he keeps going along the median nerve he will eventually reach the brachial plexus which is located in the shoulder area of the body. If Travis keeps traveling up the brachial plexus he will eventually reach the spinal cord which will lead in to the brainstem. From the brainstem he would reach the cerebellum and from the cerebellum he would reach the occipital lobe. After crossing the occipital lobe he would reach the parietal lobe. From the parietal lobe he would enter the frontal lobe and move down to the bottom of the frontal lobe to reach the cerebral cortex. This may sound very simple but along the way Travis will run into and encounter several different cells and structures varying in shape, size, and form. The first structure Travis will encounter as he travels along the nerves in the index finger to the median nerve is the lumbrical muscles, which flex proximal phalanges and extend the middle and distal phalanges. After he passes the lumbrical muscles he will reach a junction where several nerves from the fingers are merging in to on nerve that weaves in and out of the thenar muscles towards the bottom of the palm. Next he will run into the palmar branch of the median nerve, which is located on the underside of the wrist. As he travels along the beginning of the median nerve he will travel in between the flexor digitorum profundus muscle and the flexor digitorum superficialis muscle. While he is traveling between those two muscles he will pass by the joint between the radius and the humerus in the elbow area. Eventually he will reach the lateral cord of the brachial plexus. While he is traveling along the beginning of the brachial plexus he will travel under part of the collar bone. As Travis continues he will pass two small nerves: lateral pectoral and suprascapular. After he passes these two nerves he will reach the trunk of the lateral cord of the brachial plexus. In a short bit after the trunk he will reach the root of the lateral cord of the brachial plexus. While traveling through the root he will travel past the dorsal scapular. Travis will eventually into the C5 nerve of the spinal cord. From the C5 nerve he will end up along the spinal cord, while he is traveling up the spinal cord he will pass the C4, C3, C2, and C1 nerves, which all lead to lungs and the C2 nerve is head and neck movement as well. From the spinal cord he will travel into the brainstem, which controls your breathing and heart beat. Once he reaches where the brainstem and cerebellum meet he will go around the cerebellum, but he may want to watch out for wrinkles in the brain because he could fall in to the wrinkle with his current size. After he goes around the cerebellum he will reach the occipital lobe which will be cover in cerebrospinal fluid. As he gets half way across the occipital lobe the cerebrospinal fluid will be covered by meninges or brain lining. At the end of the occipital lobe he will reach the parietal lobe which will also be covered in cerebrospinal fluid cover with meninges. After he gets across the parietal lobe he will reach the frontal lobe, which is also covered with cerebrospinal fluid covered with meninges. Once Travis has reached the bottom of the frontal lobe he will have reached the cerebral cortex. When he has reached the cerebral cortex of Sparky Gugglensky, the cerebral cortex will identify him and zap him outside of Gugglensky’s body and change him back to normal.