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Across 4. describes the mental activity associated with thinking, learning, and memory 6. Protective sheath around the spinal cord 10. a knotlike mass of nervous tissue outside of the central nervous system 11. Controls vital bodily functions 12. Peripheal Nervous System 14. Originate on the surface of the brain 17. vital fluid to nuorish and cool the CNS 19. Abnormal Growth within the brain 20. Bundle or group of fibers in the brain or spinal cord 23. A chemical messanger that allows neurons to transfer impulses across a synapse 24. Stalklike portion of the brain that connects the brain to the spinal cord 25. awake, aware, and responsive 28. Conrols hearing and smell 29. connective tissue that xurrounds the brain and spinal cord 30. Brings Nerve impulses away from the brain 33. Specialist ( MD ) in treating chemical depenencies, emotional problems, and mental illness 35. One or more bundles of nueron cells 36. Nerve Specialist 37. inflammation of the sciatic nerve 39. A physician who specializes in surgery of the nervous system 42. Basic cell of the nervous system 43. Produces sensations by relaying impulses to and from the cerebral cortex

Down 1. Recieves and interprets impulses from sensory organs 2. Automatic, involuntary response to a stimulus 3. Neurotransmitter released within the brain 5. Controls eyesight 7. The space between two neurons 8. network of intersecting nerves, blood, or lymphatic vessels 9. Brings nerve impules towords the brain 13. Maintenece of the enviroment of the body 15. sites on the body that recieve external stimulation 16. Controls the most basic functions of the body 18. Nervous tissue in the spinal cord and brain 21. Neurotransmitter that assists in sleep 22. Brief lack of consciousness caused by a brief lack of oxygen 26. controls motor functions 27. Tumor of the spinal cord 31. The loss of the ability to read or write and the ability to comprehend it. 32. Inability to Sleep 34. Anything that excites a nerve and creates an impulse 38. Autonomic Nervous System 40. Stroke, caused by a lack of blood flow 41. Central Nervous System