Cranial Nerves The brain and spinal cord (CNS) are connected to parts of the body by nerves and cell bodies called the peripheral nervous system. The PNS contains all of the nervous tissue outside the brain and spinal cord. Afferent (sensory) nerve fibers-conduct nerve impulses toward the CNS Efferent (motor) nerve fibers-conduct nerve pulses away Sensory Somatic System – Carries nerve impulses from the senses to the CNS and also carries the impulses to the skeletal muscles and glands
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Chapter 11‚ Prepare a report on Spina Bifida. Spina bifida is a birth defect that affects the nerves in the spinal cord which sends the messages to the muscles that allow you to walk. The spinal cord is a tube of nerves that most of the time is closed‚ but rarely there is a hole in the tube of nerves. When this occurs the back opens up. Surgery can be performed on infants to close this opening. One out of every one thousand babies are born with spina bifida. In 1992‚ the U.S. Public Health
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California standard. Analysis Questions: 1.) What observable features of the brain helped you determine Dorsal from Ventral…front from back? I was able to determine the front from the back of the sheep brain because the spinal cord leads from the end of the brain down the body. I was able to tell the top from the bottom of the sheep brain because I was able to identify the left and right hemisphere. 2.) When locating the pairs of the cranial nerves what structures would they
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Before celebrating her first birthday‚ Marie Surprenant had suffered more than most people do in an entire lifetime. Her abusive parents beat her unmercifully eventually breaking many bones in her body and severing her spinal cord. Fortunately for Marie‚ she was taken out of custody of her parents and was adopted by Michele Surprenant. Doctors gave Marie a grim prognosis. They said she would need constant medical attention the rest of her life and she wouldn’t be able to walk or even stand up
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to a reflex arc: 1.) The Receptor‚ which receives the initial stimulus 2.) The Sensory (afferent) Nerve‚ which carries the impulse to the spinal cord or brain 3.) The Intermediate Nerve Fibre (the adjustor or interneuron)‚ which interprets the signal and issues a response 4.) The Motor (efferent) Nerve‚ which then carries the response message from the spinal cord to the muscle or organ 5.) The Effector Organ itself‚ which carries out the response Proprioceptors and the Control of Movement Proprioceptors
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Central Nervous System- the processing center for the nervous system. It receives information from and sends information to the peripheral nervous system. The two main organs of the CNS are the brain and spinal cord. The brain processes and interprets sensory information sent from the spinal cord. 3. Cerebrum- in humans‚ the cerebrum is the largest part and superior-most region of the vertebrate central nervous system. It is also divided into approximately symmetric left and right cerebral hemispheres
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When I was fourteen‚ I was in an accident which resulted in a spinal cord injury - incomplete‚ leaving me paralyzed from my waist down. We had recently relocated to Texas from Florida‚ so all of our family and friends were predominantly in Florida. For me the unexpected or “catastrophic” event was arduous for me to overcome. My mother‚ father‚ and brother were all supportive during my rehabilitation journey. I spent seven months at Texas Institute for Rehabilitation and Research (TIRR) in Houston
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dermatome is an area of skin that is mainly supplied by a single spinal nerve. There are eight cervical nerves (C1 being an exception with no dermatome)‚ twelve thoracic nerves‚ five lumbar nerves and five sacral nerves. Each of these nerves relays sensation (including pain) from a particular region of skin to the brain. Along the thorax and abdomen the dermatomes are like a stack of discs forming a human‚ each supplied by a different spinal nerve. Along the arms and the legs‚ the pattern is different:
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vertebral arteries enter the cranium via the foramen magnum near the junction of the medulla and spinal cord. They run along the medulla just ventral to the olives and lateral to the pyramids. Each vertebral artery gives off an anterior spinal branch. These fuse at the midline forming the anterior spinal artery‚ which descends down the medulla onto the cervical spinal cord. The branches of the anterior spinal artery penetrate the pyramids‚ supplying a ventral wedge of the medulla that includes the pyramids
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system consists of the brain‚ spinal cord and a complex network of neurons. The central nervous system is responsible for receiving‚ sending and interpreting information from the whole body. The nervous system also monitors and coordinates internal organ functions and responds to external changes as they occur. The two main organs of the central nervous system are the brain and spinal cord. The brain processes and interprets sensory information sent from the spinal cord‚ which are protected by three
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