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Home      Chiropractic Dictionary
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Abdomen
The front part of the body that lies between the chest and pelvis.
ACL
Anterior cruciate ligament: A ligament in the knee that crosses from the underside of the femur (the thigh bone) to the top of the tibia (the bigger bone in the lower leg). Abbreviated ACL. Injuries to the ACL can occur in a number of situations, including sports, and can be quite serious, requiring surgery. 

Acne

Localized skin inflammation as a result of overactivity of the oil glands at the base of hair follicles. Acne happens when oil (sebaceous) glands come to life around puberty, when these glands are stimulated by male hormones that are produced in the adrenal glands of both boys and girls.
Actinic Keratosis
— An actinic keratosis (AK), also known as a solar keratosis, is a small, rough spot occurring on skin that has been chronically exposed to the sun. Actinic keratoses generally measure in size between 2-6 millimeters in diameter (between the size of a pencil point and that of an eraser). They are usually reddish in color, with a rough texture and often have a white or yellowish scale on top. Actinic keratosis often occurs against a background of sun damage, including sallowness, wrinkles, and superficial blood vessels.
 
 
Activator® Methods
— A diagnostic approach as well as a handheld instrument that is used to deliver a consistent low-force, high-speed chiropractic adjustment.
Acute
— Of short duration and relatively severe.
ADHD
— A family of related chronic neurobiological disorders that interfere with an individual's capacity to:
  • regulate activity level (hyperactivity),
  • inhibit behavior (impulsivity), and
  • attend to tasks (inattention) in developmentally appropriate ways. The term "attention deficit hyperactivity disorder" is abbreviated and usually referred to as ADHD.
 
Adjustment
— An intervention with the intent of facilitating the body’s ability to “right” itself and function more normally
Afferent
— Carrying impulses towards a center when sensory nerve impulses are sent toward the brain.
 
Allergy
— An allergy refers to an exaggerated reaction by our immune system in response to bodily contact with certain foreign substances. It is exaggerated because these foreign substances are usually seen by the body as harmless and no response occurs in non- allergic people. Allergic people's bodies recognize the foreign substance and one part of the immune system is turned on. Allergy-producing substances are called "allergens." Examples of allergens include pollens, dust mite, molds, danders, and foods. To understand the language of allergy it is important to remember that allergens are substances that are foreign to the body and can cause an allergic reaction in certain people.
 
 
 
Alzheimer's Disease
— Alzheimer's disease (AD) is a slowly progressive disease of the brain that is characterized by impairment of memory and eventually by disturbances in reasoning, planning, language, and perception. Many scientists believe that Alzheimer's disease results from an increase in the production or accumulation of a specific protein (beta-amyloid protein) in the brain that leads to nerve cell death.
The likelihood of having Alzheimer's disease increases substantially after the age of 70 and may affect around 50% of persons over the age of 85. Nonetheless, Alzheimer's disease is not a normal part of aging and is not something that inevitably happens in later life. For example, many people live to over 100 years of age and never develop Alzheimer's disease.
 
 
Angioplasty and Stents
(Percutaneous Coronary Intervention, PCI)

— Balloon angioplasty of the coronary artery, or percutaneous transluminal coronary angioplasty (PTCA), was introduced in the late 1970's. PTCA is a non-surgical procedure that relieves narrowing and obstruction of the arteries to the muscle of the heart (coronary arteries). This allows more blood and oxygen to be delivered to the heart muscle. PTCA, is now referred to as percutaneous coronary intervention, or PCI, as this term includes the use of balloons, stents, and atherectomy devices. PCI is accomplished with a small balloon catheter inserted into an artery in the groin or arm, and advanced to the narrowing in the coronary artery. The balloon is then inflated to enlarge the narrowing in the artery. When successful, PCI can relieve chest pain of angina, improve the prognosis of patients with unstable angina, and minimize or stop a heart attack without having the patient undergo open heart coronary artery bypass graft (CABG) surgery.

 
Antalgic Position
 
— An abnormal position of the body resulting from the body's attempt to minimize pain.
Anterior
— Toward the front of the body.
Articulation
— The connection of bones; a joint.
Assignment
— An agreement between doctor and patient to waive payment until a claim is paid by an insurance company, which is then paid directly to the doctor.
Asthma
— a chronic inflammation of the bronchial tubes (airways) that causes swelling and narrowing (constriction) of the airways. The result is difficulty breathing. The bronchial narrowing is usually either totally or at least partially reversible with treatments.  ( Also, Take Our Asthma Myths Quiz )
 
 
Atlas
— The uppermost and most freely movable bone of the spine.
Atrophy
— A decrease in the size of a normally developed tissue or organ.
Autonomic Nervous System
— The part of the nerve system that regulates involuntary action, as of the intestines, heart, and glands, and comprises the sympathetic nervous system and the parasympathetic nervous system.