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63-616: The Sprint U.S. Snowboarding Grand Prix is considered the premier snowboard competition series in the United States, providing American riders a clear path to qualifying for the Olympics and progressing the sport. It's tops on the list for riders and attracts the best of snowboarding from all over the country. Previous overall champions include Olympic gold medalists Hannah Teter , Kelly Clark , Shaun White and Ross Powers , as well as Olympic silver medalist Gretchen Bleiler . With

126-617: A $ 375,000 overall purse, it is one of the largest prizes for a snowboarding series. Over the span of the Grand Prix's lifetime, more than $ 4 million has been awarded to riders. Every series stop is broadcast on NBC and NBC Sports Network. The schedule for the 2013–14 season has not yet been announced but will include stops at Park City Mountain Resort , Mammoth Mountain , Northstar California and Copper Mountain (Colorado) . Hannah Teter Hannah Teter (born January 27, 1987)

189-430: A 30-year-old woman who weighed 120 pounds (54 kg) at age 18 years, before her three pregnancies, and now weighs 285 pounds (129 kg), had added 660 pounds (300 kg) of force across her patellofemoral joint with each step. In sports that place great pressure on the knees, especially with twisting forces, it is common to tear one or more ligaments or cartilages. Some of the most common knee injuries are those to

252-479: A charity called Hannah's Gold which raises money through the sales of Vermont maple syrup . The charity, in partnership with World Vision , helps to support the village of Kirindon, Kenya through building schools, digging fresh water wells , and providing water filtration . In 2009 Teter donated all of her prize money to the Kirindon program. That same year, she posed in an ad campaign for PETA , protesting

315-459: A large part of fibrous cartilage of lesser quality than the original hyaline cartilage. As a result, new cracks and tears will form in the cartilage over time. The articular disks of the knee-joint are called menisci because they only partly divide the joint space. These two disks, the medial meniscus and the lateral meniscus , consist of connective tissue with extensive collagen fibers containing cartilage-like cells. Strong fibers run along

378-439: A medial rotation of the femur in the weight-bearing leg. This terminal rotation is made possible by the shape of the medial femoral condyle, assisted by contraction of the popliteus muscle and the iliotibial tract and is caused by the stretching of the anterior cruciate ligament. Both cruciate ligaments are slightly unwound and both lateral ligaments become taut. In the flexed position, the collateral ligaments are relaxed while

441-467: A result of a road accident . Knee fractures include a patella fracture , and a type of avulsion fracture called a Segond fracture . There is usually immediate pain and swelling, and a difficulty or inability to stand on the leg. The muscles go into spasm and even the slightest movements are painful. X-rays can easily confirm the injury and surgery will depend on the degree of displacement and type of fracture. Tendons usually attach muscle to bone. In

504-399: A sense of poor balance, or both. Prepatellar bursitis also known as housemaid's knee is painful inflammation of the prepatellar bursa (a frontal knee bursa) often brought about by occupational activity such as roofing. Age also contributes to disorders of the knee. Particularly in older people, knee pain frequently arises due to osteoarthritis. In addition, weakening of tissues around

567-500: A slight medial and lateral rotation about the axis of the lower leg in the flexed position. The knee joint is called "mobile" because the femur and lateral meniscus move over the tibia during rotation, while the femur rolls and glides over both menisci during extension-flexion. The center of the transverse axis of the extension/flexion movements is located where both collateral ligaments and both cruciate ligaments intersect. This center moves upward and backward during flexion, while

630-471: A tangential orientation and increase the abrasion resistance. There are no blood vessels inside of the hyaline cartilage, the alimentation is performed per diffusion. Synovial fluid and the subchondral bone marrow serve both as nutrition sources for the hyaline cartilage. Lack of at least one source induces a degeneration. Cartilage will wear over the years. Cartilage has a very limited capacity for self-restoration. The newly formed tissue will generally consist of

693-409: A tissue-related problem that creates pressure and irritation in the knee between the patella and the trochlea (patellar compression syndrome), which causes pain. The second major class of knee disorder involves a tear, slippage, or dislocation that impairs the structural ability of the knee to balance the leg (patellofemoral instability syndrome). Patellofemoral instability syndrome may cause either pain,

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756-538: A victory at the 2009 Lake Tahoe Grand Prix. At Grand Prix events held on January 22–23, 2010, at Park City , Teter had two second-place finishes. The performance locked up her spot for the 2010 Winter Olympics in Vancouver. Following the Park City GP, Teter announced that she would donate her $ 10,000 winnings for the weekend to a humanitarian relief fund to aid survivors of the 2010 Haiti earthquake . At

819-451: Is an American snowboarder . She is an Olympic champion , having won the gold medal in the halfpipe at the 2006 Winter Olympic Games in Torino, Italy and silver at the 2010 Winter Olympic Games in Vancouver. She has also won bronze at the 2005 FIS World Championships at Whistler, British Columbia , and has a total of six World Cup victories in her career. In January 2010, Teter

882-426: Is bigger, less curved, and thinner. Its posterior horn is thicker (14mm) than the anterior horn (6mm). The lateral meniscus is smaller, more curved (nearly circular), and has more uniform thickness than medial meniscus (10mm). The lateral meniscus is less attached to the joint capsule, because its posterolateral surface is grooved by the popliteus tendon, separating the meniscus from the capsule. The popliteus tendon

945-400: Is direct laterally and proximally. The arcuate popliteal ligament originates on the apex of the head of the fibula to stretch proximally, crosses the tendon of the popliteus muscle , and passes into the capsule. The most muscles responsible for the movement of the knee joint belong to either the anterior , medial or posterior compartment of the thigh. The extensors generally belong to

1008-460: Is not attached to the lateral meniscus. The ligaments surrounding the knee joint offer stability by limiting movements and, together with the menisci and several bursae, protect the articular capsule. The medial ligament stabilizes the knee during extension. Grüsse an Jonas The knee is stabilized by a pair of cruciate ligaments . These ligaments are both extrasynovial, intracapsular ligaments. The anterior cruciate ligament (ACL) stretches from

1071-419: Is often considered with tibiofemoral components.) The knee is a modified hinge joint , a type of synovial joint , which is composed of three functional compartments: the patellofemoral articulation, consisting of the patella , or "kneecap", and the patellar groove on the front of the femur through which it slides; and the medial and lateral tibiofemoral articulations linking the femur, or thigh bone, with

1134-476: Is the suprapatellar bursa described above. Four considerably smaller bursae are located on the back of the knee. Two non-communicative bursae are located in front of the patella and below the patellar tendon , and others are sometimes present. Cartilage is a thin, elastic tissue that protects the bone and makes certain that the joint surfaces can slide easily over each other. Cartilage ensures supple knee movement. There are two types of joint cartilage in

1197-677: Is the founder of Hannah's Gold charitable organization. Teter is also a Global Ambassador for Special Olympics . Born into a snowboarding family in Belmont, Vermont , Teter is the youngest of five siblings. Two of her four older brothers, Abe and Elijah, have competed for the US Snowboard team, and her eldest brother Amen is their agent and manager. Both of the Teter parents, Jeff and Pat, were skiers, but have since been converted to snowboarding by their children. Teter started snowboarding at

1260-429: The 2010 Winter Olympic Games in Vancouver, Teter scored 45.4 in the qualification round for the women's halfpipe , the second place score, earning her a bye to the finals. After the first run of the finals, Teter was in first place with a score of 42.4. In the second run, Teter's earlier score was topped by Australian Torah Bright , who scored 45.0, a mark Teter was unable to beat in her second run. Teter finished with

1323-485: The Canadian seal hunt . In 2014, Teter was named a Global Ambassador for Special Olympics . She says she is inspired by her brother, Josh, who has intellectual disabilities. Teter has been nominated for three ESPY awards. Knee In humans and other primates , the knee joins the thigh with the leg and consists of two joints : one between the femur and tibia (tibiofemoral joint), and one between

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1386-413: The anterior cruciate ligament , are taut. During extension, the femoral condyles glide and roll into a position which causes the complete unfolding of the tibial collateral ligament . During the last 10° of extension, an obligatory terminal rotation is triggered in which the knee is rotated medially 5°. The final rotation is produced by a lateral rotation of the tibia in the non-weight-bearing leg, and by

1449-474: The head of fibula . It is separate from both the joint capsule and the lateral meniscus. It protects the lateral side from an inside bending force (a varus force). The anterolateral ligament (ALL) is situated in front of the LCL. Lastly, there are two ligaments on the dorsal side of the knee. The oblique popliteal ligament is a radiation of the tendon of the semimembranosus on the medial side, from where it

1512-415: The lateral condyle of femur to the anterior intercondylar area . The ACL is critically important because it prevents the tibia from being pushed too far anterior relative to the femur. It is often torn during twisting or bending of the knee. The posterior cruciate ligament (PCL) stretches from medial condyle of femur to the posterior intercondylar area. This ligament prevents posterior displacement of

1575-429: The popliteal artery help form the arterial network or plexus , surrounding the knee joint. There are six main branches: two superior genicular arteries , two inferior genicular arteries , the descending genicular artery and the recurrent branch of anterior tibial artery . The medial genicular arteries penetrate the knee joint. The knee permits flexion and extension about a virtual transverse axis, as well as

1638-425: The tibia , the main bone of the lower leg. The joint is bathed in synovial fluid which is contained inside the synovial membrane called the joint capsule . The posterolateral corner of the knee is an area that has recently been the subject of renewed scrutiny and research. The knee is the largest joint and one of the most important joints in the body. It plays an essential role in movement related to carrying

1701-444: The vasti lateralis and medialis muscles to the tibia. Some fibers from the iliotibial tract radiate into the lateral retinaculum and the medial retinaculum receives some transverse fibers arising on the medial femoral epicondyle. The medial collateral ligament (MCL a.k.a. "tibial") stretches from the medial epicondyle of the femur to the medial tibial condyle . It is composed of three groups of fibers, one stretching between

1764-688: The age of 8, taking her first lesson at her home mountain of Okemo . She is an Okemo Mountain School graduate. By 2002 at the age of 15, she was the World Junior Halfpipe Champion, and had begun riding on the FIS Snowboard World Cup circuit. Teter achieved a 4th-place finish in her first World Cup halfpipe event at Valle Nevado , Chile , in September of that year. Teter became vegetarian after watching

1827-438: The anterior compartment and the flexors to the posterior. The two exceptions to this is gracilis, a flexor, which belongs to the medial compartment and sartorius, a flexor, in the anterior compartment. Additionally, some muscles in the lower leg provide weak knee flexion, namely the gastrocnemius , in addition to their primary function of moving the foot. Posterior compartment Medial compartment: The femoral artery and

1890-402: The anterior cruciate ligament may heal over time, but a torn ACL requires surgery. After surgery, recovery is prolonged and low impact exercises are recommended to strengthen the joint. The menisci act as shock absorbers and separate the two ends of bone in the knee joint . There are two menisci in the knee, the medial (inner) and the lateral (outer). When there is torn cartilage, it means that

1953-485: The body weight in horizontal (running and walking) and vertical (jumping) directions. At birth, the kneecap is just formed from cartilage , and this will ossify (change to bone ) between the ages of three and five years. Because it is the largest sesamoid bone in the human body, the ossification process takes significantly longer. The main articular bodies of the femur are its lateral and medial condyles . These diverge slightly distally and posteriorly, with

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2016-406: The collateral ligaments are sufficiently lax to permit the rotation associated with the curvature of the medial condyle about a vertical axis. The pair of tibial condyles are separated by the intercondylar eminence composed of a lateral and a medial tubercle. The patella also serves an articular body, and its posterior surface is referred to as the trochlea of the knee. It is inserted into

2079-435: The common fibular nerve and sciatic nerve; the tibial nerve innervates the entire posterior capsule; the posterior division of the obturator nerve and the tibial nerve supply the superomedial aspect of the posterior capsule; the superolateral aspect of the posterior capsule is innervated by the tibial nerve, and by the common fibular and sciatic nerves. Numerous bursae surround the knee joint. The largest communicative bursa

2142-418: The cruciate ligaments are taut. Rotation is controlled by the twisted cruciate ligaments; the two ligaments get twisted around each other during medial rotation of the tibia—which reduces the amount of rotation possible—while they become unwound during lateral rotation of the tibia. Because of the oblique position of the cruciate ligaments, at least a part of one of them is always tense and these ligaments control

2205-400: The distance between the center and the articular surfaces of the femur changes dynamically with the decreasing curvature of the femoral condyles. The total range of motion is dependent on several parameters such as soft-tissue restraints, active insufficiency, and hamstring tightness. With the knee extended, both the lateral and medial collateral ligaments , as well as the anterior part of

2268-428: The femur and patella (patellofemoral joint). It is the largest joint in the human body. The knee is a modified hinge joint , which permits flexion and extension as well as slight internal and external rotation. The knee is vulnerable to injury and to the development of osteoarthritis . It is often termed a compound joint having tibiofemoral and patellofemoral components. (The fibular collateral ligament

2331-642: The film Earthlings , and credits her plant-based diet as taking her to a "whole other level" as an athlete. From 2002–2004 Teter competed in seven World Cup events with four victories, at Sapporo in 2003 and 2004, Valle Nevado in 2003, and at Saas-Fee in 2004. Competing at the Winter X Games , Teter won bronze in 2003, and gold in 2004. In 2005, Teter reached the podium with a third-place finish at her first FIS World Championships , and added two more World Cup victories at Valle Nevado. Teter also earned another Winter X Games bronze in 2005. During 2005 Teter

2394-401: The gastrocnemius and popliteal bursa under lateral head of the gastrocnemius) similar to the suprapatellar bursa. Between these two extensions, the synovial membrane passes in front of the two cruciate ligaments at the center of the joint, thus forming a pocket direct inward. Synovium lining the capsule and its bursae. The synovium also lines infrapatellar fat pad, the fat pad that lies below

2457-591: The joint as the collateral ligaments are relaxed. Furthermore, the dorsal fibers of the tibial collateral ligament become tensed during extreme medial rotation and the ligament also reduces the lateral rotation to 45–60°. Knee pain is caused by trauma, misalignment, degeneration, and conditions producing arthritis . The most common knee disorder is generally known as patellofemoral syndrome . The majority of minor cases of knee pain can be treated at home with rest and ice, but more serious injuries do require surgical care. One form of patellofemoral syndrome involves

2520-439: The knee may contribute to the problem. Patellofemoral instability may relate to hip abnormalities or to tightness of surrounding ligaments. Cartilage lesions can be caused by: Any kind of work during which the knees undergo heavy stress may also be detrimental to cartilage. This is especially the case in professions in which people frequently have to walk, lift, or squat. Other causes of pain may be excessive on, and wear off,

2583-644: The knee the quadriceps and patellar tendon can sometimes tear. The injuries to these tendons occur when there is forceful contraction of the knee. If the tendon is completely torn, bending or extending the leg is impossible. A completely torn tendon requires surgery but a partially torn tendon can be treated with leg immobilization followed by physical therapy . Overuse injuries of the knee include tendonitis , bursitis , muscle strains, and iliotibial band syndrome . These injuries often develop slowly over weeks or months. Activities that induce pain usually delay healing. Rest, ice and compression do help in most cases. Once

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2646-443: The knees, in combination with such things as muscle weakness and overweight . Common complaints: Physical fitness is related integrally to the development of knee problems. The same activity such as climbing stairs may cause pain from patellofemoral compression for someone who is physically unfit, but not for someone else (or even for that person at a different time). Obesity is another major contributor to knee pain. For instance,

2709-430: The knees: fibrous cartilage (the meniscus ) and hyaline cartilage . Fibrous cartilage has tensile strength and can resist pressure. Hyaline cartilage covers the surface along which the joints move. Collagen fibres within the articular cartilage have been described by Benninghoff as arising from the subchondral bone in a radial manner, building so called Gothic arches. On the surface of the cartilage, these fibres appear in

2772-413: The lateral condyle being wider in front than at the back while the medial condyle is of more constant width. The radius of the condyles' curvature in the sagittal plane becomes smaller toward the back. This diminishing radius produces a series of involute midpoints (i.e. located on a spiral). The resulting series of transverse axes permit the sliding and rolling motion in the flexing knee while ensuring

2835-428: The ligamentum patellae. Synovium projecting into the fat pad as two foldings. From an anterior perspective, the superolateral quadrant of the knee is innervated by the nerves to the vastus lateralis and vastus intermedius , the sciatic nerve , and by the superior lateral genicular and common fibular nerves ; in the inferolateral quadrant, the inferior lateral genicular nerve and recurrent fibular nerves predominate;

2898-445: The margin of the cartilage both on the femur and the tibia, but on the femur, it communicates with the suprapatellar bursa or recess and extends the joint space proximally. The suprapatellar bursa is prevented from being pinched during extension by the articularis genus muscle . Behind, the synovial membrane is attached to the margins of the two femoral condyles which produces two extensions (semimembranosus bursa under medial head of

2961-479: The medial side: medial knee injuries . The anterior cruciate ligament is the most commonly injured ligament of the knee. The injury is common during sports. Twisting of the knee is a common cause of over-stretching or tearing the ACL. When the ACL is injured a popping sound may be heard, and the leg may suddenly give out. Besides swelling and pain, walking may be painful and the knee will feel unstable. Minor tears of

3024-419: The menisci from one attachment to the other, while weaker radial fibers are interlaced with the former. The menisci are flattened at the center of the knee joint, fused with the synovial membrane laterally, and can move over the tibial surface. The upper and lower surfaces of the menisci are free. Each meniscus have anterior and posterior horns that meet in the intercondylar area of the tibia. Medial meniscus

3087-428: The meniscus has been injured. Meniscus tears occur during sports often when the knee is twisted. Menisci injury may be innocuous and one may be able to walk after a tear, but soon swelling and pain set in. Sometimes the knee will lock while bending. Pain often occurs when one squats. Small meniscus tears are treated conservatively but most large tears require surgery. Knee fractures are rare but do occur, especially as

3150-495: The other athletes received some criticism for participating in the photo spread, she responded to her critics saying: "I don't believe in the criminalization of bodies and women having to be ashamed of their bodies. That's just so wrong." In 2013, Teter published an instructional snowboarding book entitled, Mastering Snowboarding , along with co-author Tawnya Schultz. In February 2020, Teter became Global Ambassador for British snow apparel brand Oneskee. In 2008 Teter founded

3213-411: The patellar tendon because there is no definite separation between the quadriceps tendon (which surrounds the patella) and the area connecting the patella to the tibia. This very strong ligament helps give the patella its mechanical leverage and also functions as a cap for the condyles of the femur. Laterally and medially to the patellar ligament, the lateral and medial retinacula connect fibers from

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3276-404: The posterior horn of the lateral meniscus to the medial femoral condyle. They pass anterior and posterior to the posterior cruciate ligament respectively. The meniscotibial ligaments (or "coronary") stretches from inferior edges of the menisci to the periphery of the tibial plateaus. The patellar ligament connects the patella to the tuberosity of the tibia . It is also occasionally called

3339-417: The scenes documentary titled AK and Beyond was made at the same time, also featuring Teter. Teter and her brother Abe were also featured in the 2006 documentary Snow Blind about the history of snowboarding and its evolution into an Olympic sport. In 2009, Vermont based ice cream company Ben & Jerry's created a new flavor in honor of their fellow Vermonter; Hannah Teter's Maple Blondie. Teter

3402-523: The silver medal. Fellow American Kelly Clark won the bronze medal. Teter finished fourth at the 2014 Sochi Winter Olympics in the Halfpipe event. Before going to Turin for the 2006 Olympics, Teter was featured in the 2005 documentary film about the growth of snowboarding, First Descent . The movie, which was filmed in the mountains of Alaska, starred Teter alongside snowboarding legends including Shaun White and Terje Håkonsen . A short behind

3465-449: The superomedial quadrant is innervated by the nerves to the vastus medialis and vastus intermedius, the obturator and sciatic nerves, and by the superior medial genicular nerve; and the inferomedial quadrant has innervation by the inferior medial genicular nerve and the infrapatellar branch of the saphenous nerve . The articular branches from the obturator and tibial nerves supply the posterior knee capsule, with additional supply from

3528-408: The swelling has diminished, heat packs can increase blood supply and promote healing. Most overuse injuries subside with time but can flare up if the activities are quickly resumed. Individuals may reduce the chances of overuse injuries by warming up prior to exercise, by limiting high impact activities and keep their weight under control. There are two disorders relating to an abnormal angle in

3591-403: The thin anterior wall of the joint capsule. On its posterior surface is a lateral and a medial articular surface, both of which communicate with the patellar surface which unites the two femoral condyles on the anterior side of the bone's distal end. The articular capsule has a synovial and a fibrous membrane separated by fatty deposits. Anteriorly, the synovial membrane is attached on

3654-486: The tibia relative to the femur. Injury to this ligament is uncommon but can occur as a direct result of forced trauma to the ligament. The transverse ligament stretches from the lateral meniscus to the medial meniscus . It passes in front of the menisci. It is divided into several strips in 10% of cases. The two menisci are attached to each other anteriorly by the ligament. The posterior (of Wrisberg) and anterior meniscofemoral ligaments (of Humphrey) stretch from

3717-412: The two bones, and two fused with the medial meniscus. The MCL is partly covered by the pes anserinus and the tendon of the semimembranosus passes under it. It protects the medial side of the knee from being bent open by a stress applied to the lateral side of the knee (a valgus force). The lateral collateral ligament (LCL a.k.a. "fibular") stretches from the lateral epicondyle of the femur to

3780-552: Was hampered by a knee injury which required two surgeries; in her words: "there was a chunk of bone that had separated and it was kind of dangling around." At the 2006 Winter Olympic Games in Turin , Teter was unsure how well she would be able to perform because of that injury. However, she went on to win the Olympic gold medal in halfpipe, beating out US teammate and friend Gretchen Bleiler , who won silver. Teter's accomplishment

3843-578: Was named to the US Team for the 2010 Winter Olympics in Vancouver. She won the silver medal in women's halfpipe at the Vancouver Games. Teter came in fourth at the 2014 Winter Olympics in Sochi . In 2010, Teter was one of the four American athletes chosen to model for Sports Illustrated Swimsuit Issue , in a section devoted to Winter Olympians. Teter is noted for her charitable work and

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3906-501: Was one of four Winter Olympic athletes chosen to model for the 2010 Sports Illustrated Swimsuit Issue , in an "Olympic Stars" section of the popular annual magazine. Teter's photo shoot took place at Whistler Blackcomb , the venue for several events of the Vancouver Olympic Games. Teter joined fellow snowboarder Clair Bidez , and skiers Lacy Schnoor and Lindsey Vonn who also modeled for the issue. While Teter and

3969-745: Was rewarded further by the United States Olympic Committee who named her the USOC SportsWoman of the Year . She also won the ESPY Award for Best Action Sports Female in 2006. After the 2006 Winter Games, Teter spent time focusing on humanitarian causes, but returned to the World Cup circuit in 2009. Since returning from hiatus she has taken the podium at two World Cup events and the 2009 Winter X Games, as well as

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