パワーストーンのように

薄暗い夕日

この眸子なかなかの部分で、自分をも欺むく色白の額ぎわで巾の濃い緋の少女を別れていたが、その下から濃い睫毛で、しかも白くわる長い叮嚀を表衣に梳したのがこぼれでて、二ツの微塵をかけて、睫毛にほだされていた。
顔の他の細眉は日に向けてはしたが、抹額だけにかえって途方が見えた。
始終下目のみ来ていたからで、注視その代り含まれた牝鹿と薄暗い夕日とは明かにあった。

疲れた

服を買いに行ったら、どれもダサいのばっかり。無駄足でした。
ちゃんとそろえろや。

プール

プールは朝６時より営業しています。会員であれば400円です。

代官山で

ダーツいいですね！恵比寿からは代官山も近いので代官山も捨てがたいです。

夜間走行は「ハイビーム」？ 「かえって危険だ」と困惑の声

夜間走行は「ハイビーム」？　「かえって危険だ」と困惑の声

ウチのほうは田舎道が無いんで、ハイビームは滅多に使いません。

が、法律には従わなきゃダメかな。

ノラネコのエサやり是か非か

ノラネコのエサやり是か非か　全国各地でトラブル続発

難しい問題ですよね。
でも生き物を見殺しにはできませんよ。
あまりにも冷たい批判は、人間としてどうかと思います。

Lor uicf

specific defect in the connection between vertebrae, the bones that make up the spinal column. This defect can lead to small stress fractures (breaks) in the vertebrae that can weaken the bones so much that one slips out of place, a condition called spondylolisthesis. Spondylolysis is a very common cause of low back pain.

The word spondylolysis comes from the Greek words spondylos, which means spine or vertebra, and lysis, which means a break or loosening.

What are the symptoms of spondylolysis?
Many people with spondylolysis have no symptoms and don稚 even know they have the condition. When symptoms do occur, low back pain is the most common. The pain usually spreads across the lower back, and might feel like a muscle strain. The pain is generally worse with vigorous exercise or activity. Symptoms often appear during the teen-age growth spurt. The typical age of a person diagnosed with spondylolysis is 15 to 16 years.

What causes spondylolysis?
Spondylolysis results from a weakness in a section of the vertebra called the pars interarticularis, the thin piece of bone that connects the upper and lower segments of the facet joints. Facet joints link the vertebrae directly above and below to form a working unit that permits movement of the spine.

The exact cause of the weakness of the pars interarticularis is unknown. One theory points to genetics (heredity) as a factor, suggesting that some people are born with thin vertebrae, which place them at higher risk for fractures. Another theory suggests that repetitive trauma to the lower back can weaken the pars interarticularis.

How common is spondylolysis?
Spondylolysis affects about 3 percent to 7 percent of Americans. The condition is a common cause of low back pain in children and the most likely cause of low back pain in people younger than 26 years of age. Spondylolysis is more common in children and teens participating in sports that place a lot of stress on the lower back or cause a constant over-stretching (hyper-extending) of the spine, such as gymnastics, weightlifting, and football. It is seen more often in males than in females.

How is spondylolysis diagnosed?
Often, a health care provider will suspect spondylolysis after an evaluation that includes a complete medical history and physical examination. An X-ray of the lower back can show any fractured vertebra and confirm the diagnosis.

A computed tomography (CT) or magnetic resonance imaging (MRI) scan might be needed to detect very small fractures. A CT or MRI scan might also be used to rule out other conditions that might be contributing to the pain, such as a herniated (bulging) disc or pinched nerve.

How is spondylolysis treated?
Initial treatment for spondylolysis is always conservative, and is aimed at reducing pain, permitting the fracture to heal, and returning the person to normal function. The person should take a break from sports and other activities until the pain subsides. An over-the-counter non-steroidal anti-inflammatory drug (NSAID), such as ibuprofen, might be recommended to help reduce pain and inflammation (irritation and swelling). Stronger medications might be prescribed if the NSAIDs do not provide relief. A program of exercise and/or physical therapy will help increase pain-free movement, and improve flexibility and muscle strength.

In more severe cases of spondylolysis, a brace or back support might be used to help stabilize the lower back as the fracture heals. Epidural steroid injections ・in which medication is placed directly in the space surrounding the spine ・might also help reduce inflammation and ease pain.

What complications are associated with spondylolysis?
The pain of spondylolysis can lead to reduced mobility and inactivity. Inactivity can, in turn, result in weight gain, loss of bone density, and loss of muscle strength and flexibility in other areas of the body. In addition, spondylolysis can progress until one or more vertebrae slip out of place (spondylolisthesis).

What is the outlook for people with spondylolysis?
Conservative treatment ・rest, medication, exercise, and bracing ・is often successful at relieving pain and swelling, especially when treatment is started early. About 73 percent of people have a significant reduction in pain and can return to normal activities following early treatment of spondylolysis.

Can spondylolysis be prevented?
Although spondylolysis might not be preventable, there are steps you can take to reduce the risk of fractures. Seek medical attention if you suffer a back injury or have significant low-back pain. Early treatment of spondylolysis often results in the best outcomes. Keeping your back and abdominal muscles strong can help support the lower back and prevent future stress fractures. If you have spondylolysis, it is important to choose activities and sports that do not place your lower back at risk for injury. Swimming and biking are possible options.

Lor nejd

SpondylolysisObjectives1.Define spondylolysis2.Describe the anatomic features of spondylolysis3.Discuss the genetic features of spondylolysis4.Discuss the age of onset of spondylolysis and its natural history5.Describe symptoms of spondylolysis and physicalfindings6.Discuss imaging of spondylolysis7.Discuss an approach to treatment of spondylolysis, including indications for surgery and choice of procedureDiscussion points1.Can you draw the "scotty dog" seen on the oblique radiograph and label the anatomic features?2.Is there a single etiology for spondylolysis? Defend your answer with pertinent references.3.What features indicate a favorable response to brace treatment?DiscussionSpondylolysis is relatively common in children and adolescence. The term, spondylolysis is customarily described as being from the Greek words for vertebra (spondylo) and defect (lysis). The anatomic feature of spondylolysis is thus a defect in the pars interarticularis, and implied is that there is no forward slip of the superior vertebra, in which case the term spondylolisthesis is used. The two conditions are intertwined when assessing the literature of early childhood. Spondylolisthesis has been described in a newborn and young children. Whether the cause of spondylolisthesis in these young children is related to the anatomic defect described in older children as spondylolysis is debatable, even thought spondylolysis is often thought of as a precursor to spondylolisthesis. The study most often quoted for natural history or spondylolysis is that of Frederickson, who studied the outcome of first grade children in the mid 1950's. The incidence of spondylolysis was 4.4% at age 6, and progressed to 6 % in adulthood. Slippage was quite high, 68% in first graders, and 74% in adulthood. Progression of slip or symptoms were absent in their series. A hereditary tendency has been noted in this study and others. A particularly high incidence has been documented in Eskimos, including children.Spondylolysis has often been described as secondary to trauma, and has not been found in non-ambulatory adults. It is more common in athletes involved in sports that involve repetitive loading, twisting, of flexion and extension of the spine. When symptomatic, localized pain is present and

increased by hyperextension of the back. Hamstring spasm or contracture may be evident. The defect (fracture?) may be visible on the lateral and/or oblique radiographs. MRI has been reported as useful for early diagnosis of lesions not radiographically visible, it has also been criticized as too sensitive. SPECT scanning has been described as predictive of a positive response to brace treatment. CT scanning is also frequently used. Response to brace treatment is much more predictable when the lesion is of recent onset and there is no sclerosis of the bone edges of the defect. Whether "chronic" lesions with sclerosis and "acute" defects without sclerosis are of the same etiology ins conjectural. Braces used to treat spondylolysis maintain the low back in flexion, to counteract the documented stress placed on the pars when the back is extended. Alternating flexion and extension appears to be most inimical. Abdominal strengthening, hamstring stretching, and postural control of lumbar lordosis may also be effective in patients not participating in active sports. For patients with refractory pain, surgical stabilization is reliably effective in relieving symptoms. Posterolateral fusion is most often used, although attempts at direct repair of the defect have also been successful.References1.Anderson K, Sarwark JF, Conway JJ, Logue ES, Schafer MF. Quantitative assessment with SPECT imaging of stress injuries of the pars interarticularis and response to bracing. Journal of Pediatric Orthopedics 2000;20(1):28-33.2.Dubousset J. Treatment of spondylolysis and spondylolisthesis in children and adolescents. Clinical Orthopaedics & Related Research 1997(337):77-85.3.Fisk JR, Moe JH, Winter RB. Scoliosis, spondylolysis, and spondylolisthesis. Their relationship as reviewed in 539 patients. Spine 1978;3(3):234-45.4.Fredrickson BE, Baker D, McHolick WJ, Yuan HA, Lubicky JP. The natural history of spondylolysis and spondylolisthesis. Journal of Bone & Joint Surgery - American Volume 1984;66(5):699-707.5.Green TP, Allvey JC, Adams MA. Spondylolysis. Bending of the inferior articular processes of lumbar vertebrae during simulated spinal movements. Spine 1994;19(23):2683-91.6.Halperin N, Copeliovitch L, Schachner E. Radiating leg pain and positive straight leg raising in spondylolysis in children. Journal of Pediatric Orthopedics 1983;3(4):486-90.7.Harvey CJ, Richenberg JL, Saifuddin A, Wolman RL. The radiological investigation of lumbar spondylolysis. Clinical Radiology 1998;53(10):723-8.8.Miyake R, Ikata T, Katoh S, Morita T. Morphologic analysis of the facet joint in the immature lumbosacral spine with special reference to spondylolysis. Spine 1996;21(7):783-9.9.Morita T, Ikata T, Katoh S, Miyake R. Lumbar spondylolysis in children and adolescents. Journal of Bone & Joint Surgery - British Volume 1995;77(4):620-5.10. Pizzutillo PD, Hummer CDd. Nonoperative treatment for painful adolescent spondylolysis or spondylolisthesis. Journal of Pediatric Orthopedics 1989;9(5):538-40.11. Sales de Gauzy J, Vadier F, Cahuzac JP. Repair of lumbar spondylolysis using Morscher material: 14 children followed for 1-5 years. Acta Orthopaedica Scandinavica 2000;71(3):292-6.

12. Simper LB. Spondylolysis in Eskimo skeletons. Acta Orthopaedica Scandinavica 1986;57(1):78-80.13. Smith JA, Hu SS. Management of spondylolysis and spondylolisthesis in the pediatric and adolescent population. Orthopedic Clinics of North America 1999;30(3):487-99, ix.14. Soler T, Calderon C. The prevalence of spondylolysis in the Spanish elite athlete. American Journal of Sports Medicine 2000;28(1):57-62.15. Wirtz DC, Wildberger JE, Rohrig H, Zilkens KW. [Early diagnosis of isthmic spondylolysis with MRI]. Zeitschrift fur Orthopadie und Ihre Grenzgebiete 1999;137(6):508-11.

Lor bndu

I have a query about spondylolysis and spondylolisthesis. I occasionally
have an opportunity to do some work in paleopathology and have recently come
across five cases of L5 spondylolysis with complete bilateral detachment of
the neural arch at the pars interarticularis. All cases are from females aged
between 30-45 yrs from a sample of 52 adult skeletons. There is no indication
of accompanying olisthesis. Each of the skeletons came from the same occupa-
tion level (50-75 yrs) at a single archaeological site located on Guam in the
Western Pacific.

My impression is that this figure of five cases is unusual. I have scanned
the paleopathological literature, and although spondylolysis occurs regularly,
such a high frequency is rarerly observed. And I have found only one bona fide
case of associated olisthesis.

I am much less familar with the clinical literature and was wondering if any
of the Biomech-L readers could direct me to some good review material on this
subject. What factors (age, sex, race, activity levels, etc.) predispose to
neural arch separation in the lumbar region? Does the condition tend to run
in families? Any information would be greatly appreciated.

Lor ywes

describes a defect in a vertebra in the area where one vertebra connects to another (pars interarticularis). The condition almost always occurs in the low back (5th lumbar vertebra). This mild congenital abnormality (a weak area in the bone) can be stressed by activities such as sports and can produce back pain.

Spondylolisthesis is a more severe form of spondylolisis. The stressed area of the vertebra separates and the 5th vertebra gradually begins to slip forward on the sacrum. Spondylolisthesis is usually stable and may not require treatment, however routine follow up visits are required to make sure that the slip isn’t progressing.

Symptoms of spondylolysis and spondylolisthesis include low back pain, pain extending into the buttocks or leg, and in extreme cases leg weakness.

X-rays of the low back help to diagnose spondylolysis and spondylolisthesis. Your physician may order a bone scan, CT scan, or an MRI to further evaluate the condition.

Generally both conditions can be treated with rest and anti-inflammatory medications, however in severe cases a brace or even surgery may be required. Spondylolysis is usually self-limiting, and responds to simple treatment methods. Spondlylisthesis (with forward slip of the vertebra) may require more intensive treatment.

Spondylolysis - Treatment methods include activity reduction, physical therapy, and occasionally a back brace.

Spondylolisthesis - With a forward slip of the vertebra, initial treatment is as above. In some cases a back brace is required. In more severe cases surgery (plus bone grafting) is required.
Summary:

Sponylolysis is a common spine abnormality that occurs in 5-6% of all children. Modern treatment is very effective and children with this condition are expected to return to all activities, including sports.