nervous system System of nerves that includes the brain‚ brainstem‚ and spinal cord Cell body Part of a neuron that contains a nucleus but does not incorporate the axon and dendrites Peripheral nervous system All nerves that are not part of the CNS Dendrites Short branched extension of a nerve cell that receives signals from other nerves cells. Somatic nervous system Nervous system associated with voluntary body movements‚ such as moving and arm or leg. Axon Long threat like nerve cell that sends impulses
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muscle contraction Introduction For a skeletal muscle fiber to contract‚ a stimulus must be applied to it. The stimulus is delivered by a nerve cell‚ or neuron. A neuron has a threadlike process called and axon that my run 91 cm or more to a muscle. A bundle of such fibers from man different neurons composes a nerve. A neuron that stimulates muscle tissue is called a motor neuron. The motor neuron branches into terminal structures called telodendria that come into close approximation with
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as everyone knows‚ is what happens when some thing is placed on the tongue. A more technical definition is that it is the direct detection of chemical composition‚ usually through contact with the tongue. The tongue is the muscle that has different nerves on it that relay information to the brain‚ via the nervous system. This information is put back together and depending on your likes and dislikes‚ you either spit the food out or keep eating. Brandt 4 The tongue is covered with chemoreceptor
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the pupil‚ it travels straight to the rods and cones without having to bounce off the back of the eye. The light travels through the rods and cones and then through the many neurons. By the time the light reaches the optic nerve‚ it is already out of the eye. Since the optic nerve is not in the eye‚ there is no blind spot that occurs. For this reason‚ evolutionists believe that the verted eye is superior to the inverted eye. They say that this design is much more practical and makes much more sense
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References: [1] ‚”Nerve Grafting”‚ [2] www.google.com [3] www.cbsnews.com [4] http://www.smh.com.au/news/world/its-not-the-movies-says-bionic- [5] Woman/2006/09/15/1157827154967.html.. [6] http://www.abcnews.go.com/Health/
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for this lab we can examine these effects with aid of a finger pulse transducer and a bar stimulus electrode. The finger pulse transducer generates a force peak amplitude that displays the extent to which a muscular twitch responds to a nerve stimulus‚ and nerve frequency. Therefore‚ the purpose of this lab was to observe how the motor unit recruitment in contractile
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and act as safety devices to avoid the grinding hence wearing of successive vertebrae. If‚ unfortunately due to physical trauma the cartilaginous ring of a disc ruptures and displaces‚ it is called a disc slip. This protrusion presses upon a spinal nerve‚ emerging from the spinal cord in between the vertebrae‚ causing severe pain and unability to move. Prolonged rest on a hard bed and use of painkillers help repair this damage. [pic] Osteoarthritis: Osteoarthritis is a degenerative joint disease
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|Unipolar neurons |Multipolar neurons | |transmit impulses generated by olfactory‚ visual‚ |Convey impulses from variety of specialized and |Transmit both sensory and motor nerve impulses | |vestibular‚ and auditory receptor endings ( sensory in|nonspecialized receptors | | |function |
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Left carpal tunnel syndrome. OPERATION Left carpal tunnel decompression. ANESTHESIA IV regional. PROCEDURE FINDINGS The left transverse carpal ligament was moderately thickened‚ and it was causing moderate compression of the left median nerve in the carpal tunnel. DETAILS OF PROCEDURE The patient was brought conscious to the operating room and placed on the operating table in the supine position with the left arm abducted out on an arm board. After the anesthesiologist secured an IV
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Illness : Violent coughing can damage the nerves in the olfactory glands‚ a viral infection or respiratory virus may damage the olfactory nerve. When a viral infection like the "flu" involves the cells of the olfactory epithelium‚ the viral particles destroy the normal functioning of the nasal olfactory cells. Also‚ allergy or infection in the
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