Knee Pain Glossary of Terms

The following are health and medical definitions of terms that appear in the Knee Pain article.

Abnormal: Outside the expected norm, or uncharacteristic of a particular patient.

Absorption: Uptake. For example, intestinal absorption is the uptake of food (or other sub...

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Acetaminophen: A nonaspirin pain reliever or analgesic. Acetaminophen may be given alone t...

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ACL injury: See: Anterior cruciate injury.

Acute: Of abrupt onset, in reference to a disease. Acute often also connotes an illness th...

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Amputation: Removal of part or all of a body part that is enclosed by skin. Amputation can...

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Anatomy: The study of human or animal form, by observation or examination of the living be...

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Ankle: The ankle joint is complex. It is made up of two joints: the true ankle joint and ...

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Anterior: The front, as opposed to the posterior. The anterior surface of the heart is tow...

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Anterior cruciate ligament: A ligament in the knee that crosses from the underside of the ...

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Antibiotic: A drug used to treat infections caused by bacteria and other microorganisms. ...

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Arthritis: Inflammation of a joint. When joints are inflamed they can develop stiffness, w...

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Arthroscopic: Related to arthroscopy.

Arthroscopy: A surgical technique in which a tube-like instrument is inserted into a joint...

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Aspiration: Removal of a sample of fluid and cells through a needle. Aspiration also re...

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Blood pressure: The blood pressure is the pressure of the blood within the arteries. It is...

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Bursa: A closed, fluid-filled sac that functions as a gliding surface to reduce friction b...

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Bursae: Plural of bursa.

Bursitis: Bursitis is inflammation of a bursa. A bursa is a tiny fluid-filled sac that fu...

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Calcium: A mineral found mainly in the hard part of bones, where it is stored. Calcium is ...

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Calf: The belly or fleshy hind part of the back of the leg below the knee. The calf is mad...

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Cartilage: Firm, rubbery tissue that cushions bones at joints. A flexible kind of cartilag...

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Cast: 1) A protective shell of fiberglass, plastic, or plaster, and bandage that is molde...

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Chills: feelings of coldness accompanied by shivering. Chills may develop after exposure t...

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Chondromalacia: : Abnormal softening or degeneration of cartilage. See also patellofemoral...

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Chronic: In medicine, lasting a long time. A chronic condition is one that lasts 3 months ...

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Chronic pain: Pain (an unpleasant sense of discomfort) that persists or progresses over ...

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Circulation: In medicine, the movement of fluid through the body in a regular or circuitou...

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Collateral: In anatomy, a collateral is a subordinate or accessory part. A collateral is a...

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Complication: In medicine, an unanticipated problem that arises following, and is a result...

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Compress: Cloth or another material applied under pressure to an area of the skin and held...

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Compression: 1. The act of pressing together. As in a compression fracture, nerve c...

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Contrast: Short for "contrast media." Contrast media are X-ray dyes used to provide contra...

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Cruciate: Cross-shaped.

CT scan: Computerized tomography scan. Pictures of structures within the body created by a...

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Diabetes: Refers to diabetes mellitus or, less often, to diabetes insipidus. Diabetes mell...

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Diagnosis: 1 The nature of a disease; the identification of an illness. 2 A ...

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Emergency department: The department of a hospital responsible for the provision of medica...

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Essential: In medicine, of unknown cause, as in essential hypertension (high blood pressur...

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Extremity: An uttermost part of the body, such as a hand or a foot.

Femoral: Having to do with the femur.

Femur: The single bone in the thigh, which is the largest bone in the human body. Also kno...

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Fever: Although a fever technically is any body temperature above the normal of 98.6 degr...

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Fibula: The smaller of the two bones in the lower leg. The end of the fibula forms the bon...

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Fracture: A break in bone or cartilage. Although usually a result of trauma, a fracture ca...

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Gonorrhea: A bacterial infection that is transmitted by sexual contact. Gonorrhea is one o...

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Gout: Condition characterized by abnormally elevated levels of uric acid in the blood, rec...

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Hamstring: One of the prominent tendons at the back of the knee. The hamstrings are the si...

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Hemophilia: An inherited disorder in which the ability of blood to clot normally is impair...

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High blood pressure: A repeatedly elevated blood pressure exceeding 140 over 90 mmHg. Chro...

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Housemaid's knee: See Prepatellar bursitis.

Hyaluronic acid: A viscous slippery substance that lubricates the joints, maintains the sh...

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Ibuprofen: A nonsteroidal anti-inflammatory drug (NSAID) that is commonly used to treat pa...

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Immune: Protected against infection, usually by the presence of antibodies.

Immune system: A complex system that is responsible for distinguishing a person from every...

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Indicate: In medicine, to make a treatment or procedure advisable because of a particular ...

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Infection: The invasion and multiplication of microorganisms such as bacteria, viruses, an...

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Inflammation: A localized reaction that produces redness, warmth, swelling, and pain as a ...

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Injure: To harm, hurt, or wound. The word injure may be in physical or emotional sense. Fr...

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Injury: Harm or hurt. To harm, hurt, or wound. The word injure may be in physical or emot...

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Joint: The area where two bones are attached for the purpose of permitting body parts to m...

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Jumper's knee: See: Patellar tendonitis.

Kidney: One of a pair of organs located in the right and left side of the abdomen. The kid...

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Knee: The knee is a joint which has three parts. The thigh bone (the femur) meets the lar...

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Knee joint: The knee joint has three parts. The thigh bone (the femur) meets the large sh...

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Kneecap: The patella, the small bone in the front of the knee. The patella is a little (se...

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Lateral: 1. In anatomy, the side of the body or a body part that is farther from th...

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Leg: In popular usage, the part of the body from the top of the thigh down to the foot, an...

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Ligament: A tough band of connective tissue that connects various structures, such as two ...

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Lower leg: The lower leg is the bottom segment of the leg: the part below the knee.

Magnetic resonance imaging: A procedure that uses magnetism, radio waves, and a computer t...

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Medial: 1. Pertaining to the middle; in or toward the middle; nearer the middle of ...

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Meniscus: The word "meniscus" comes from the Greek and refers to a crescent-shaped structu...

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Metabolism: The whole range of biochemical processes that occur within a living organism. ...

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Microscope: An optical instrument that augments the power of the eye to see small objects....

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Motor: Something that produces or refers to motion. For example, a motor neuron is a nerve...

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MRI: Magnetic resonance imaging.

Muscle: Muscle is the tissue of the body which primarily functions as a source of power. T...

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Narcotic: 1. A drug that causes insensibility or stupor. A narcotic induces narcosi...

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Nerve: A bundle of fibers that uses electrical and chemical signals to transmit sensory an...

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NSAID: Nonsteroidal anti-inflammatory drug, a medication that is commonly prescribed or pu...

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Obese: Well above ones normal weight. A person has traditionally been considered to be obe...

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Obesity: The state of being well above one's normal weight.

Operating room: A facility that is equipped for performing surgery. Abbreviated OR.

Orthotic: A support, brace, or splint used to support, align, prevent, or correct the func...

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Osgood-Schlatter disease: A condition involving inflammation and sometimes tearing of liga...

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Osteoarthritis: A type of arthritis caused by inflammation, breakdown, and eventual loss ...

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Overweight: The term "overweight" is used in two different ways. In one sense it is a way ...

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Pain: An unpleasant sensation that can range from mild, localized discomfort to agony. Pa...

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Patella: The kneecap by another name, the patella is the small bone that is in the front ...

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Patellar: Pertaining to the patella (kneecap).

Patellar tendon: A tendon that extends down from the quadriceps muscle in the thigh to inc...

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Joint, patellofemoral: One of the knee joints. The knee has three parts. The thigh bone (f...

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Pelvic: Having to do with the pelvis, the lower part of the abdomen, located between the h...

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Pharmacy: A location where prescription medications are sold. A pharmacy is constantly sup...

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Physical therapist: A person who is trained and certified by a state or accrediting body t...

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Posterior: The back or behind, as opposed to the anterior.

Prepatellar bursitis: Inflammation of the bursa that is positioned in front of the kneecap...

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Prescription: A physician's order for the preparation and administration of a drug or dev...

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Prognosis: The forecast of the probable outcome or course of a disease; the patient's chan...

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Progressive: Increasing in scope or severity, advancing, or going forward. For example, a ...

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Proteins: Large molecules composed of one or more chains of amino acids in a specific orde...

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Pseudogout: Inflammation of the joints that is caused by deposits of calcium pyrophosphate...

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Puberty: Adolescence, the period in which the human body first becomes capable of reproduc...

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Quadriceps: Although the term "quadriceps" technically may refer to any four-headed muscle...

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Range of motion: The full movement potential of a joint, usually its range of flexion and ...

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Referred pain: Pain felt at a site other than where the cause is situated. An example is t...

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Regimen: A plan or a regulated course, such as a diet, exercise, or treatment, that is des...

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Rehabilitation: The process of helping a person who has suffered an illness or injury rest...

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Rheumatoid arthritis: An autoimmune disease characterized by chronic inflammation of joint...

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Rheumatologist: A specialist in the non-surgical treatment of rheumatic illnesses, espec...

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Risk factor: Something that increases a person's chances of developing a disease. For exam...

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Rupture: A break or tear in any organ (such as the spleen) or soft tissue (such as the ach...

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Scan: As a noun, the data or image obtained from the examination of organs or regions of...

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Seat belt: A belt used to hold an individual in their seat.

Sensation: In medicine and physiology, sensation refers to the registration of an incoming...

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Sexually transmitted disease: Any disease transmitted by sexual contact; caused by microo...

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Sleep: The body's rest cycle.

Sprain: An injury to a ligament that results from overuse or trauma. The treatment of a sp...

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Steroid: One of a large group of chemical substances classified by a specific carbon struc...

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Stomach: The digestive organ that is located in the upper abdomen, under the ribs. The upp...

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Strain: 1. An injury to a tendon or muscle resulting from overuse or trauma. 2. A heredita...

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Stress: In a medical or biological context stress is a physical, mental, or emotional fact...

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Surgeon: A physician who treats disease, injury, or deformity via operative or manual meth...

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Surgery: The branch of medicine that employs operations in the treatment of disease or inj...

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Syndrome: A combination of symptoms and signs that together represent a disease process.

Tear: A drop of the salty secretion of the lacrimal glands which serves to moisten the con...

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Temple: The area just behind and to the side of the forehead and the eye, above the side o...

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Tendon: The soft tissue by which muscle attaches to bone. Tendons are somewhat flexible, b...

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Therapy: The treatment of disease. Therapy is synonymous with treatment.

Thigh: The thick, muscular portion of the leg that extends from the hip to the knee. The t...

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Tibia: The larger of the two long bones in the lower leg. The tibia is familiarly known as...

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Tired: A feeling of a lessened capacity for work and reduced efficiency of accomplishment,...

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Trauma: A physical or emotional injury.

Tubercle: A small tuber; a small lump or bump.

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Tylenol: See: Acetaminophen.

Upper leg: More properly called the thigh, the upper leg is the area between the knee and ...

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Uric acid: A breakdown product of purines that are part of many foods. In gout, there are ...

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Viable: Capable of life. For example, a viable premature baby is one who is able to surviv...

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Warfarin: An anticoagulant drug (brand names: Coumarin, Panwarfin, Sofarin) taken to prev...

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X-ray: High-energy radiation with waves shorter than those of visible light. X-ray is used...

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