Instruments Dmd Discovery

DJ Discovery $29.95 DISCOVERY EXCLUSIVE! Winner of Creative Toy Awards 2011, Preferred Choice Award from Creative Child Magazine. New! Set the stage for little performers with DJ Discovery. DJ Discovery lets them choose five music styles, including hip-hop and jazz. Spin "records" for a classic "scratching" sound. DJ Discovery comes with a 2-level volume button, and applause key. Includes four instruments and effects. Two AA batteries (included).

Instruments Relating to the Discovery and Use of Electricity $34.99 Instruments Relating to the Discovery and Use of Electricity - Giclee Print

Discovery $10.49 Discovery

Celestron AstroMaster 90AZ Telescope $239.95 If you're looking for a dual-purpose telescope appropriate for both terrestrial and celestial viewing, then the AstroMaster Series is for you. Each AstroMaster model is capable of giving correct views of land and sky.The AstroMaster Series produce bright, clear images of the Moon and planets. It is easy to see the moons of Jupiter and the rings of Saturn with every one of these fine instruments 90 mm (3.5") diameter refractor1000 mm focal length (f/11)Altazimuth mountBuilt-on StarPointer finderscope20 mm eyepiece (50x) 1.25"10 mm eyepiece (100x) 1.25"Erect image diagonal 1.25"Adjustable height 1.25" steel leg tripod with accessory tray"The Sky X" First Lightedition CD-ROM

Celestron AstroMaster 76EQ Telescope $159.95 If you're looking for a dual-purpose telescope appropriate for both terrestrial and celestial viewing, then the AstroMaster Series is for you. Each AstroMaster model is capable of giving correct views of land and sky.The AstroMaster Series produce bright, clear images of the Moon and planets. It is easy to see the moons of Jupiter and the rings of Saturn with every one of these fine instruments. 76 mm (3") diameter Newtonian reflector700 mm focal length (f/9)German Equatorial mount (CG-2) with RA and DEC slow-motion controls and setting circlesBuilt-on StarPointer finderscope20 mm erect image eyepiece (35x)10 mm eyepiece (70x) 1.25"Adjustable height 1.25" steel leg tripod with accessory tray"The Sky X" First Light edition CD-ROM

Celestron AstroMaster 114EQ Telescope $239.95 If you're looking for a dual-purpose telescope appropriate for both terrestrial and celestial viewing, then the AstroMaster Series is for you. Each AstroMaster model is capable of giving correct views of land and sky.The AstroMaster Series produce bright, clear images of the Moon and planets. It is easy to see the moons of Jupiter and the rings of Saturn with every one of these fine instruments. 114 mm (4.5") diameter Newtonian reflector1000 mm focal length (f/9)German Equatorial mount (CG-2) with RA and DEC slow-motion controls and setting circlesBuilt-on StarPointer finderscope20 mm erect image eyepiece (50x)10 mm eyepiece (100x) 1.25"Adjustable height 1.25" steel leg tripod with accessory tray"The Sky X" First Light edition CD-ROM

Celestron AstroMaster 130EQ Telescopes $259.95 If you're looking for a dual-purpose telescope appropriate for both terrestrial and celestial viewing, then the AstroMaster Series is for you. Each AstroMaster model is capable of giving correct views of land and sky.The AstroMaster Series produce bright, clear images of the Moon and planets. It is easy to see the moons of Jupiter and the rings of Saturn with every one of these fine instruments. 130 mm (5") diameter Newtonian reflector650 mm focal length (f/5)German Equatorial mount (CG-3) with RA and DEC slow-motion controls and setting circlesBuilt-on StarPointer finderscope20 mm erect image eyepiece (33x)10 mm eyepiece (65x) 1.25"Adjustable height 1.25" steel leg tripod with accessory tray"The Sky X" First Light edition CD-ROM

Meade 8 inch or 10 inch Equatorial Wedge $149.95 The Meade 8" or 10" Equatorial Wedge is an excellent tool to provide stability and rigidity to your telescope. A must-have for extended astrophotography, the wedge can handle even heavy telescope accessories. With a Meade Instruments Equatorial Wedge, you gain a vibration-minimizing tool along with the ability to more easily follow objects along the Earth's axis. A Meade 8 or 10 Equatorial Wedge is required equipment for astrophotography sessions longer than about 5 minutes. This crucial tool minimizes vibration and provides for a more rigid mount in equatorial mode. The result is an elimination of field rotation in long-exposure photographs and easy tracking of objects in one direction along the Earth's axis.Both of the telescope accessories, Wedge and Superwedge, are of excellent basic design, constructed from heavy plate castings and solidly bolted together. Each has ample strength and stability to support the telescope, even when heavily loaded down with accessories.Notes: No wedge is required for exposure images less than about 5 minutes. Select the Standard Equatorial Wedge for 8" and 10" LX200 Telescopes; select the Superwedge for Meade 12" LX200 Telescopes.Additionally, you can improve your LX200 tripod set up with an optional Tripod Accessory Tray. The telescope accessories tray attaches directly to tripod legs, providing an easy access point for eyepieces, filters and more. Note: tray does not have eyepiece holes. Buy the Meade 8" or 10" Equatorial Wedge to minimize vibration and strengthen the support of your telescope during extended photography sessions.

Deluxe Ghost Hunting Kit $99.95 With the Deluxe Ghost Hunting Kit, you'll be armed to gather the most credible evidence of paranormal activity a living person can obtain. The kit contains the most up-to-date instruments available, including an EVP listener to track Electronic Voice Phenomena; a digital thermometer to indicate temperature changes that often occur when entities are present; and a vital EMF meter to detect magnetic fields that might indicate ghostly energy in the vicinity. The Deluxe Ghost Hunting equipment kit fits into a convenient case that can be packed and unpacked quickly, so you and your team can hit several locations in one evening if need be. A Deluxe Ghost Hunting Kit lets you enter the world of paranormal research, which is still a new science. There is no such thing as a ghost detector, and no one yet knows for sure what causes paranormal phenomena. A deluxe ghost hunting equipment kit is vital. Many theories exists, and most assume that if humans can experience a paranormal sight, sound, chill, or other sensation, then there should be some type of detectable physical/environmental change. The ghost hunting tools in this kit represent some of the most popular items for extending human senses, allowing users to sense and scientifically quantify changes that cannot be explained under normal circumstances. Naturally, these tools will also detect changes that can be explained by normal activity such as electrical wiring, wind movement, etc. Even with deluxe ghost hunting supplies, it is up to you, the paranormal researcher, to use your powers of reasoning to sort out which activity is paranormal because it cannot be explained by ordinary means. For this reason, it is important to work with these tools under normal circumstances first to determine what ordinary causes are likely to be found for changes that can be detected by these tools, and to become familiar with what they can and cannot do. And even with the Deluxe Ghost Hunting Kit, remember, in paranormal research, there are no guarantees that you will find a ghost or have a paranormal experience. Buy the Deluxe Ghost Hunting Kit, and start your investigation into the paranormal with the most accurate and reliable equipment you can buy to obtain credible proof of otherworldly activity.Kit Includes: GaussMaster EMF meter Portable Motion Sensor EVP Listener Digital Local Remote Thermometer Deluxe Carrying Case to keep it all together EVP Listener EVP (Electronic Voice Phenomena) are human-like sounds that are recorded by electronic devices, which may or may not be audible to humans, and for which an ordinary explanation cannot be found. Paranormal researchers have theorized that EVP might be caused by magnetic phenomena, which bypass our normal hearing mechanism and directly impact the recording device. The EVP Listener converts AC magnetic fields into the corresponding sound of same frequency and intensity, so that the user can hear magnetic phenomena in real time. The EVP Listener can be used w

Morgan Freeman's Through The Wormhole DVD $24.99 The Morgan Freeman's Through The Wormhole DVD set explores the outer edges of science to answer big questions: Who are we, do aliens exist? The eight-show series features the top minds astrophysics, astrobiology and other fields. The Through The Wormhole DVDs appeal to anyone who is curious about the universe and their place in it. The Morgan Freeman's Through The Wormhole DVD set will explore the deepest mysteries of existence the questions that have puzzled mankind for eternity (Who-or what-am I? Are we alone? How did this begin? What happened before that?). The Through The Wormhole DVDs will bring together the brightest minds and best ideas from the very edges of Science Astrophysics, Astrobiology, Quantum Mechanics, String Theory, and more to reveal the extraordinary truth of our Universe. 1. What Happened Before the Beginning: Every cosmologist and astronomer agrees: our Universe is 13.7 billion years old. Using cutting-edge technology, scientists are now able to take a snapshot of the Universe a mere heartbeat after its birth. Armed with hypersensitive satellites, astronomers look back in time to the very moment of creation, when all the matter in the Universe exploded into existence. It is here that we uncover an unsolved mystery as old as time itself if the Universe was born, where did it come from? Meet the leading scientists who have now discovered what they believe to be the origin of our Universe, and a window into the time before time. 2. Are We Alone?: Aliens almost certainly do exist. So why haven't we yet met E.T.? It turns out we're only just developing instruments powerful enough to scan for them, and science sophisticated enough to know where to look. As a result, race is on to find the first intelligent aliens. But what would they look like, and how would they interact with us if we met? The answers may come to us sooner than we imagine, for one leading astronomer believes she may already have heard a hint of their first efforts to communicate. 3. Is Time Travel Possible?: Einstein's world-shaking Theory of Relativity says that time travel is perfectly possible if you're going forward in time. Finding a way to travel backwards requires breaking the speed of light, which so far seems impossible. But now, strange-but-true phenomena such as quantum nonlocality (where particles instantly teleport across vast distances) may give us a way to make the dream of traveling back and forth through time a reality. Step into a time machine and rewrite history, bring loved ones back to life, control our destinies. But if succeed, what are the consequences of such freedom? Will we get trapped in a plethora of paradoxes and multiple universes that will destroy the fabric of the universe? 4. How Did We Get Here?: Everywhere we look in the most hospitable of environments and in the most extreme we find life. On Earth, life exists everywhere we look. Yet we have only ever found life on our planet. How did the stuff of stars come toget

Through The Wormhole Seasons 1-2 $41.99 Included: Through the Wormhole Season 1 DVD The Morgan Freeman's Through The Wormhole DVD set explores the outer edges of science to answer big questions: Who are we, do aliens exist? The eight-show series features the top minds astrophysics, astrobiology and other fields. The Through The Wormhole DVDs appeal to anyone who is curious about the universe and their place in it. The Morgan Freeman's Through The Wormhole DVD set will explore the deepest mysteries of existence - the questions that have puzzled mankind for eternity (Who-or what-am I? Are we alone? How did this begin? What happened before that?). The Through The Wormhole DVDs will bring together the brightest minds and best ideas from the very edges of Science - Astrophysics, Astrobiology, Quantum Mechanics, String Theory, and more - to reveal the extraordinary truth of our Universe. 1. What Happened Before the Beginning: Every cosmologist and astronomer agrees: our Universe is 13.7 billion years old. Using cutting-edge technology, scientists are now able to take a snapshot of the Universe a mere heartbeat after its birth. Armed with hypersensitive satellites, astronomers look back in time to the very moment of creation, when all the matter in the Universe exploded into existence. It is here that we uncover an unsolved mystery as old as time itself - if the Universe was born, where did it come from? Meet the leading scientists who have now discovered what they believe to be the origin of our Universe, and a window into the time before time. 2. Are We Alone?: Aliens almost certainly do exist. So why haven't we yet met E.T.? It turns out we're only just developing instruments powerful enough to scan for them, and science sophisticated enough to know where to look. As a result, race is on to find the first intelligent aliens. But what would they look like, and how would they interact with us if we met? The answers may come to us sooner than we imagine, for one leading astronomer believes she may already have heard a hint of their first efforts to communicate. 3. Is Time Travel Possible?: Einstein's world-shaking Theory of Relativity says that time travel is perfectly possible - if you're going forward in time. Finding a way to travel backwards requires breaking the speed of light, which so far seems impossible. But now, strange-but-true phenomena such as quantum nonlocality (where particles instantly teleport across vast distances) may give us a way to make the dream of traveling back and forth through time a reality. Step into a time machine and rewrite history, bring loved ones back to life, control our destinies. But if succeed, what are the consequences of such freedom? Will we get trapped in a plethora of paradoxes and multiple universes that will destroy the fabric of the universe? 4. How Did We Get Here?: Everywhere we look in the most hospitable of environments and in the most extreme we find life. On Earth, life exists everywhere we look. Yet we have only ever found life on

Discovery Foil Bead Machine $24.95 DISCOVERY EXCLUSIVE!Professional jewelry designers start from scratch and so can you with the Discovery Foil Bead Maker! Use three bead molds and 72 sheets of foil in four colors to create necklaces, earrings, bracelets and more. The Discovery Foil Bead Makeralso includes earring hooks, cords, a beading needle and easy-to-follow instructions.

Discovery Expedition Clarion Globe $99.95 An expedition Clarion Discovery globe has a wooden base and glossy brown metal meridian that are sure to make it the focal point of any room. With an overall height of 18 and easy to read place names, youll have no problem getting the family around this globe to plan your next adventure. The Discovery expedition Clarion world globe features up-to-date cartography and colors and design that are unique to Discovery, so make your move and order yours today!

Discovery Expedition Clearfield Globe $69.95 Every Clearfield expedition Discovery globe has a matte black metal base and meridian, and bright blue oceans that make it an attractive piece for any home or office. The overall height is 16 and features current cartography, a color and design unique to Discovery, and easy to read names, so planning your next big adventure will be easy. The American made Discovery expedition Clearfield world globe is the perfect gift for the world traveler or globe enthusiast in your life.

Discovery Crazy Craft Kit $47.95 DISCOVERY EXCLUSIVE! The Discovery Crazy Craft Kit supplies you all the tools you need to learn the essentials of sewing, crocheting and embroidering. Choose from nine different projects with the Crazy Craft Kit, including the stuffed dog, coin purse, sewing pouch, hair ribbon, felt brooch and more. Visit the Discovery Channel Blog for great DIY craft ideaslike the felt rosetteusing the Giant Activity Box.

Discovery Butterfly Canopy $24.95 DISCOVERY EXCLUSIVE! The Discovery Butterfly Canopy Habitat allows you to witness a caterpillar become a butterfly up close! The transparent mesh canopy habitat gives you a sneak peek into one of nature's mysteries. A feeder is included with the collapsible, reusable Discovery Butterfly Canopy Habitat. Butterfly larvae will be shipped to your home once you receive the habitat and mail in the included card. For this reason, allow for extra time to fully assemble this window into the secret world of metamorphosis.

Discovery Giant Activity Box $39.95 DISCOVERY EXCLUSIVE! The Discovery Giant Activity Box offers sixteen great projects all in one giant activity box of fun. Clay animals, collage materials, sticker art, tissue art and paper bag puppets name just a few. The Discovery Giant Activity Box arrives with all the supplies you need, plus easy instructions. Included: • 2 plastic frames • 4 punch-out animal shapes • 10 colors of dough • 2 peel and stick tissue art pictures • tons of tissue paper • glue • feathers • crepe paper plain and ruffled • pipe cleaner • peel and stick eyes • doilies • shredded paper confetti • buttons • cloth flowers Visit the Discovery Channel Blog for great DIY craft ideaslike the felt rosetteusing the Giant Activity Box.

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Duchenne muscular dystrophy

Introduction

Duchenne muscular dystrophy or Pseudohypertrophic muscular dystrophy or Muscular dystrophy- Duchenne type is an X-linked neuromuscular disorder of muscle caused by an absence of the protein dystrophin. DMD was named in recognition of Dr. G. Duchenne de Boulogne from France around 150 years ago. He was the first person to attribute the signs and symptoms to a distinct familial disease entity. The gene responsible for it is DMD gene which is known to be the largest gene encoding the muscle protein, dystrophin the discovery of this gene was made around 20 years ago. Dystrophin provides structural stability to the dystroglycan complex (DGC) present on the cell membrane as it attaches with the inner surface of the muscle fiber membrane. A mutation in the DMD gene residing in Xp21 region of the X-chromosome, hampers the production of dystrophin protein causing progressive loss of muscle function and weakness (Partridge, 2007). It starts with the lower limbs and gradually covers the entire musculature. DMD is rapidly progressing form of muscular dystrophy affecting male with a frequency of 1 in 3500 infants. It is observed that the affected boys start manifesting symptoms of disease early in life usually before 5 years of age. They become powerless and are unable to walk and are restricted to wheel chair during their late childhood or early teen years. Patients usually develop various complications related with respiratory insufficiency and/ or cardiomyopathy as the disease progresses. Death occurs at by late teen age or in the early twenties. It is essential to provide appropriate treatment to overcome the basic genetic defect, either through medical, surgical, and rehabilitative approaches to make the patient comfortable.  

Symptoms

Before the age of 6 years symptoms start becoming obvious, although they are visible in early infancy. There are three clinical stages: an ambulatory stage, an early nonambulatory stage, and a late nonambulatory stage.

Ambulatory Stage- This is between two and four years of age, at this stage, symptoms start appearing. Symptoms show weakness of forward head flexion and a inadequate capability to sit up persist beyond infancy leading to poor motor development, deficient memory skills and they gradually reduce their ability to cope with their peers both physically and mentally. Heel cord and elbow flexion contractures are also apparent. In rare cases, obstructive sleep apnea also develops along with facial soiling. The ECG readings show- Q waves leads in the lateral precordial while tall R and deep S waves leads in early precordial. If glucocorticoids are not given then by the age of nine years, the child starts lacking ability to rise from supine to standing position and to climb stairs or arise from a chair and are able to ambulate with braces.

Early Nonambulatory Stage- This stage is between 10 and 12 years, the patient becomes dependent on wheel chair and flexion contractures at the ankle and elbow becomes more obvious. In this stage aquatic therapy may slow the progression. The dependency on wheel chair develops scoliosis and the patient needs orthopedic consultation along with radiological evaluation. The average strength of the patient starts declining at the age of 9 years.

Late Nonambulatory Stage- a wheelchair to bed life style is observed in the patients. At this stage other serious conditions are also prevalent encompassing respiratory insufficiency/ failure, cardiac problems, scoliosis. Respiratory insufficiency is observed in the patients belonging to the age group of 11- 20 years and is not receiving corticosteroid therapy. The forced vital capacity is reduced to > 60% of normal. This decrease paves the way for pneumonia, decreased power of coughing, reduced effective night-time ventilation during sleep and hence reducing the survival rate of the patient. Cardiomyopathy- ECG abnormalities worsen further leading to atrial arrhythmias of varying degrees. Resting tachycardia becomes more prevalent all through the stage causing autonomic dysfunction of left ventricle. Gastrointestinal dysfunction- the esophageal and gastrointestinal complaints involve voluntary and involuntary muscles causing delayed gastric emptying, acute gastric dilatation cause risk of respiratory insufficiency. Further, chronic intestinal dysfunction occurs, with constipation, distention, hypomobility, impaction, hypokalemia and insufficient fluid intake obstruct ventilation and diaphragmatic movement during sleep.

Pathogenesis

Duchenne muscular dystrophy is caused by a mutation of the dystrophin gene at  Xp21. Dystrophin is responsible for the connection of muscle fibers to the extracellular matrix through a protein complex containing many subunits. The absence of dystrophin permits excess calcium to penetrate the cell membrane/ sarcolemma. In a complex cascading process that involves several pathways and is not clearly understood, increased oxidative stress within the cell damages the sarcolemma and eventually results in the death of the cell. Muscle fibers undergo necrosis and are ultimately replaced with adipose and connective tissue.

Treatment

It is manifested that corticosteroids (prednisone and deflazacort) show a remarkable delay in fetching the loss of muscle strength and function in boys with DMD (Sussman, 2002). It is manifested that surgical release of lower extremity contractures provides benefit and relief to some patients. It is also observed that around 90% of DMD individuals develop severe scoliosis, and this is not agreeable to control by nonsurgical means such as bracing or adaptive seating. The most successful cure for severe scoliosis is to prevent it with early spinal fusion using segmental instrumentation immediately when curves are determined and before any kind of severe pulmonary or cardiac dysfunction occurs. Approaches related to gene therapy to procure the functions of missing gene/ protein is on the way. Recent stem-cell research is showing promising vectors that may replace damaged muscle tissue. Treatment is generally aimed at controlling the onset of symptoms to maximize the quality of life. Utrophin up regulation is found to compensate for muscle cells lacking dystrophin expression .

Anesthesia in DMD

 It is observed that patients with DMD show respiratory insufficiency at the late stage and respiratory failure causes bronchopneumonia; this becomes the leading cause of death of the patient also, cardiac abnormalities are observed in majority of the cases. It is apparent that DMD patients undergo orthopedic procedures of lower limb therefore anesthesia becomes another hazard for the patient and combination of obesity and spinal deformity creates lumber spinal and extradural anesthesia technically challenging. The sacral canal is less affected and in young children caudal extradural blockade may be the technique of choice. In cases where GA is unavoidable then the pulmonary and cardiac status of the patient becomes imperative. Anesthesia may induce sudden cardiac arrest. It is also manifested that there could be mild elevation in temperature in patients with DMD undergoing anesthesia. It is evident that neuromuscular functions must be monitored (Lane, 1996).

About the Author

Monika Nigam