cells) Cells that support and protect neurons Organs of the Nervous System Brain and spinal cord Sensory receptors of sense organs (eyes‚ ears‚ etc.) Nerves connect nervous system with other systems 12-1 Divisions of the Nervous System Anatomical Divisions of the Nervous System Central nervous system (CNS) Peripheral nervous system (PNS) The Central Nervous System (CNS) Consists of the spinal cord and brain Contains neural tissue‚ connective tissues‚ and blood vessels Functions of
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most‚ complex systems in the human body. It can be broken down into two main subdivisions‚ the central nervous system (CNS) and the peripheral nervous system (PNS). The central nervous system contains about 85 billion neurons and includes the spinal cord and brain. It is considered the control center of the body and processes all types of incoming sensory information. The peripheral nervous system is composed of all the other tissue outside of the central nervous system. It can be broken down into
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meningomyelocele. Meningocele causes a portion of the spinal cord to push through the spine which forms a sac and is noticeable on the back. The sac is filled with nerve fluid but there is usually no nerve damage. In most cases‚ people live with few symptoms and sometimes none at all but in others it can cause “incomplete paralysis with bladder and bowel dysfunction” (NIH). Meningomyelocele is the most severe form of spina bifida. The meninges and the spinal cord push through the opening in the spine which
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Definition Paralysis is the loss of the power to move a part of the body due to injury or disease of the nerves that supply the muscles involved in moving that part of the body. The key points in this definition are firstly that paralysis refers to a loss of movement rather than just weakness‚ and secondly that the problem originates in the nerves to the muscles rather than in the muscles themselves. The severity of the paralysis is indicated in medical terminology by the word endings:
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Outline Spinal Cord‚ Spinal Nerves‚ Somatic Reflexes-Chapter 13 Reflexes- they are involuntary stereotyped responses to stimuli‚ they involve the brain‚ spinal cord‚ and peripheral nerves Spinal cord- cylinder nervous tissue that begins at the foramen magnum and passes through the vertebral canal as far as the inferior margin of the first lumbar vertebrae (L1)‚ 18 inches long and ½ inches wide Anterior Median Fissure- in the front‚ deeper Posterior Median Sulcus- in the back‚ shallow ▪Two Enlargements
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1. Describe the general structure and function of the nervous system. The Nervous System is a "network" which delivers information and monitors the processes taking place in our bodies at all times. The nervous system in all its aspects allows us to function as a single controlled and coordinated unit. The basic nerve cell nerve cell is a neuron; a chain of neurons is actually a "communication cable "inside our bodies. Neuron structure is basically the cell nucleus‚ the dendrites which receive information
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Janevix suardi 11/3/13 An electric signal can trick a monkey’s brain into believing the animal’s finger has been touched by Stephen Ornes 9:33am‚ October 31‚ 2013 G. TABOT ET AL/PNAS 2013 Touch something‚ and your brain knows. The hand sends signals to the brain to announce contact was made. But that feeling of touch may not require making actual contact‚ tests in monkeys now show. Zapping brain cells can fool the animal into thinking its finger had touched something. A person who
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form properly around part of the baby’s spinal cord. A person with Spina bifida is where the spinal column does not close completely and covers the spinal cord‚ usually resulting in a protrusion of the spinal cord‚ its covering‚ or both (Turnbull‚ Turnbull‚ Shank & Smith 2004‚ pg. 346). Spina bifida‚ which is not a progressive condition‚ has three common forms. The first form is Meningocele which is where cerebral spinal fluid leaks out of the spinal canal causing the area over the baby spine
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choroid with the iris Conjunctivitis- is inflammation of the conjunctiva. Decussation pyramids- the crossing of the fibers of the corticospinal tracts from one side of the central nervous system to the other near the junction of the medulla and the spinal cord. External auditory meatus- he canal extending from the opening in the external ear to the tympanic membrane. Fovea centrals-Is a part of the eye‚ located in the center of the macula region of the retina. Glaucoma- refers to a group of eye conditions
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and ruptured discs‚ which are also called herniated discs. Injuries: Spine injuries such as sprains and fractures can cause either short-lived or chronic back pain. Sprains are tears in the ligaments that support the spine‚ and they can occur from twisting or lifting improperly. Fractured vertebrae are often the result of osteoporosis‚ a condition that causes weak‚ porous bones. Less commonly‚ back pain may be caused by more severe injuries that result from accidents and falls. Acquired conditions
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