Muscle Injury Generalities Quiz

Muscles store energy like springs, releasing it efficiently during movement, especially with eccentric/concentric contractions.

Muscle lengthening while contracting, helping store energy for powerful subsequent contractions.

Muscle injury healing occurs in overlapping stages: Destruction, Repair, and Remodelling.

Initial phase of muscle injury; tissue tearing, bleeding, and activation of clotting factors, like platelets.

Muscle injury repair phase; fibroblasts repair damage, inflammation occurs, and the body repairs the injured tissue. Blood vessels rebuild

Muscle injury repair phase; new muscle fibers form, innervation and blood supply improve. Healing concludes.

Muscle stem cells that repair muscle tissues by transforming into myoblasts.

Muscle tissue takes about a year to fully heal after injury, although 80% strength may be achieved in months.

A partial tear in the muscle-tendon junction, often occurring during eccentric contractions.

A complete tear through the entire muscle diameter, including the bone-tendon junction.

Direct muscle trauma from a blunt force causing a bruise, pain, loss of motion.

Mild muscle injury, involving soreness after activity and possible slight fibril tears.

Moderate muscle tear, potentially involving the muscle and/or tendon

Complete muscle tear, severe damage.

Application of ice to reduce inflammation in the first 24-48 hours after injury.

Nonsteroidal anti-inflammatory drugs (NSAIDs) can hinder muscle regeneration and cause fibrosis.

Muscle injuries can result from fatigue, dehydration, or imbalances of crucial minerals like potassium, sodium, and fibers.

Hydration, warming up, stretching, and controlled training load are crucial for reducing muscle injury risk.

A minor muscle problem characterized by pain and reduced function but no fiber tears.

Moderate muscle tear with pain and impaired function, potentially lasting 3+ months to heal.

Severe muscle tear requiring surgery and lengthy rehab (months or longer).

Muscle soreness triggered by eccentric exercise within 24-72 hours post-activity, resolving within 1-2 weeks.

A localized tear, usually less than muscle fascicle in diameter, causing sharp pain at injury time.

Involuntary muscle contraction, described as a hard, palpable mass, relieved by stretching.

Dense, unidirectional collagen fibers providing strong resistance to pulling forces. Found in tendons, ligaments, and muscle sheaths.

More flexible and less dense than Type I. Helps with movement control, protection, and nutrient delivery. Found in muscle, tendon, and vessels.

Sense of body position and movement. Fascia contains specialized receptors that transmit information about joint position and muscle tension to the brain.

Specialized receptors in fascia that detect vibrations and rapid changes in muscle tension.

Specialized receptors in fascia that sense slow, sustained pressure. Can contribute to relaxation by reducing CNS activity.

Helps muscles work more efficiently by distributing forces and improving coordination. Plays a role in muscle strength and joint stability.

The interconnected network of muscle and fascia. Helps transmit forces and coordinates muscle actions throughout the body

Fascia helps maintain tendon position during muscle contraction and can even contract itself to a small degree.

A disorder characterized by widespread musculoskeletal pain, fatigue, and other symptoms like sleep problems, mood disorders, and cognitive difficulties.

Common symptoms include widespread muscle and joint pain, fatigue, sleep disturbances, cognitive impairment, and mood disorders. Pain is often described as burning, twitching, or tightness.

A condition where thickened bands of tissue form under the skin of the palm, causing the fingers to curl inward.

Treatment options include stretching exercises, injections of corticosteroids or collagenase, and surgery.

A common condition affecting runners and cyclists due to friction between the iliotibial band and the lateral epicondyle of the knee.

Symptoms include pain on the outside of the knee, just above the joint line. Diagnosis involves palpation of the lateral epicondyle and specific tests like the Renne and Noble tests.

Inflammation of the plantar fascia, a thick band of tissue on the bottom of the foot, causing heel pain.

Treatment involves rest, NSAIDs, cryotherapy, orthotics, stretching exercises, injections, and in some cases, surgery.

Fascia helps with muscle coordination, protects tissues, and transmits muscle forces. It doesn't increase resistance to trauma but helps absorb it.

Superficial fascia is a loose layer found under the skin, while deep fascia is a denser layer that surrounds muscles and joints.

Fascia helps reduce muscle stress and absorb trauma, preventing tears. Damage to fascia can cause loss of sliding capacity and pain.

Common conditions include Iliotibial Band Syndrome, Fibromyalgia, and chronic low back pain. Fascia problems can also lead to Frozen Shoulder and Ledderhose Disease.

A common cause of chronic pain and disability characterized by trigger points that refer pain distally.

Nutritional deficiencies, endocrine dysfunction, and decreased hyaluronic acid levels can all contribute to myofascial pain.

Common treatments include NSAIDs, manual therapy like massage, trigger point injection, and stretching.

The exact cause of fibromyalgia is unknown, but genetics likely play a role.