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Module 3 of Sports Medicine course REC 1030 Musculoskeletal system – Bones, muscles and joints Bones – body’s infrastructure ◦ ◦ ◦ ◦ ◦ ◦ Supports the body Protects vital organs Attachment surfaces Leverage Mineral storage Production of blood cells ◦ This is just a review I hope. Muscles – fibrous, elastic tissues that move bones ◦ Quick to heal, as they have abundant blood supply. Ligaments – Band of tissues that typically connect bones to bones. ◦ Hold the joint together Tendons– fibrous, elastic tissues that attaches muscles to bones. ◦ Protects against muscles overload ◦ Stretch receptor ◦ Golgi Tendon Organ Cartilage – gristly type of tissue found on the ends of bones. Helps absorb the shock of bones hitting each other and reduces the friction of bones rubbing together Bursae – small, fluid-filled sacs located between bones, muscles, tendons and other tissues Joints – Places where bones join ◦ Made up of ligaments, tendons, cartilage and bursae. ◦ What are the 6 types of synovial joints A classification system is essential for prevention, identification and treatment Categorized according to the length of time it took to develop 1. Acute – occurring suddenly – 2. Chronic – developing or lasting over a period of time 3. Recurrent – healed injuries but leave the structure weakened or stretched Injuries must also be classified according to the body structure that is damaged. 1. Soft Tissue – nerves, blood vessels, muscles, skin, organs, tendons, ligaments, bursae, etc. 2. Hard Tissue – Bones This is the easiest to remember. Injuries that occur suddenly to soft tissue. 1. Contusion Bruise Result from direct blow – tissues and capillaries are damaged & lose fluid or blood Causes pain and discoloration Superficial in nature, but can be deep or to bone, causing loss of function. Contusion to vital organs can be life threatening Abrasions ◦ Friction or scraping injury to the outer layer of tissue ◦ Turf burns or strawberries ◦ Cornea & outer layer of eye can be scratched by dust of other objects. ◦ Superficial injury Puncture ◦ Narrow stab wound to skin and/or internal organs ◦ Skin punctures do not bleed much, but still need treatment ◦ Deep skin punctures bleed heavily and need proper medical attention. Sprains ◦ Ligaments are stretched, torn or both ◦ Caused by direct blow or twisting ◦ Joint can lose stability ◦ Once damaged, a ligament may not regain original length, but may heal lengthened or stretched. Strains ◦ Muscle or tendon is forcefully “pulled” or stretched ◦ Is a stretching or tearing injury ◦ If severe, can disrupt a muscle or tendon’s ability to more the bones ◦ Occurs in the belly (middle) of the muscle ◦ Injury depends on the amount of fibers (torn) involved. ◦ Muscles will repair quickly but with some scar tissue and will be prone to re-injury ◦ Muscle soreness can result of over exertion. Cuts – 3 types ◦ Laceration Jagged soft tissue cuts Deeper than abrasions & cause steady bleeding ◦ Incision Smooth cuts caused by sharp glass or metal objects Bleeds heavily and quickly ◦ Avulsions Complete tissue tear. Earring ripped out Cartilage Tear ◦ If bones of a joint are twisted and compressed, they may pinch and tear the cartilage Dislocation & Subluxations ◦ When a joint is hit or twisted, the bones move out of place Dislocation ◦ Bones stay out of place Subluxation ◦ Bones “pop out” then “pop” back in Chronic injuries to the muscles, tendons, & bursa are caused by repeated blows, over stretching or over use Chronic Muscle Strain ◦ Muscle is repeatedly overworked or overstretched ◦ Develops over weeks, or months, and can last as long ◦ Differs from acute strains, as they are not caused by one specific episode Tendonitis ◦ Tendons can be irritated by repeated over-stretching or overuse ◦ Occurs in tight or weak tendons ◦ Patella, Achilles are prone to irritation, can be overstressed by repeated running and jumping activities. Bursitis ◦ Can be swollen and sore if they suffer repeated blows or irritation ◦ Common in elbow, knee and shoulder Rest Ice Compression Elevation ◦ Reduce or stop using injured area for 48 hours ◦ 20 minutes on, 4-8 times a day. ◦ Cold pack, snow, frozen peas, crushed ice ◦ Wrap in a tensor bandage, air cast, special boots or splints ◦ Reduces swelling ◦ Keep the injured area elevated above the level of the heart. Pillow or chair will do the trick Bodies natural processes in response to an injury Inflammation occurs immediately following trauma and continues for sometime afterward Inflammation may include blood fluid leaving damaged tissue and the presence of white blood cells, or anti-bacterial proteins Healing time required depends on the amount of tissue damaged Signs and Symptoms of Inflammation ◦ Swelling ◦ Redness ◦ Heat ◦ Pain ◦ Malfunction of body part The repair process can be influenced by good, immediate care, good nutrition, modified activity and a prescribed rehabilitation program Fractures: Bones that are twisted or hit too hard can break or fracture. Hard Tissue injuries refer to those injuries that occur to bone. There are different types of bone injuries, usually characterized by the type of fracture The recovery time is closely associated with the type and severity of the fracture. Closed Fracture – Most common that occur in sport – most will have noticeable deformity (but some will show no deformity at all) There are 2 types of closed fractures: 1. Avulsion Fracture 2. Epiphyseal (growth plate) Fracture Avulsion Fracture: ◦ Sprained ligaments pull off a piece of bone. ◦ Frequently occurs in the ankles Growth plates at the ends of bones are soft and prone to injury Fractures to the growth plate can affect the bone growth Common in the elbow of baseball pitchers Rare in sports, but are easily detected Deformity and an open wound. 2 Injuries in one These injuries are subject to repeated wear & tear over time that can lead to cracking Most common types of chronic bone injury are stress fractures & Arthritis Most common in those sports where the athlete is repeating the action all the time. Eg. Runners, gymnasts, golfers, tennis players. Stress Fracture ◦ Bone suffers repeated stress or shock. ◦ Producing the same motion, or landing on the ground multiple times over and over. Arthritis: is a form of joint disorder that involves inflammation of one or more joints Over 100 forms of arthritis Most common form – osteoarthritis (degenerative joint disease) Caused by: ◦ Trauma ◦ Infection ◦ Age