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Laminectomy: A surgical procedure that removes a portion of the plate that
serves as the back of the spinal canal. This decompression procedure is
performed for treatment of herniated intervertebral discs and spinal stenosis.
Leptin: A hormone produced by the small intestine that signals the brain to stop
eating. People who are overweight will often have a diminished leptin
response in the brain.
Ligament: Strong, dense bands made of connective tissue that stabilize a
joint, connecting bone to bone across the joint.
Lipoprotein: Compounds of protein that carry fats and fat-like substances,
such as cholesterol, in the blood.
Local anesthetics: Drugs that block nerve conduction in the region where
it is applied.
Lordosis: The curve in the cervical and lumbar spine. An abnormal
accentuated arch in the lower back swayback.
Low back pain: Pain at the base of the spine that can be caused by several
Low-density lipoprotein (LDL): A form of cholesterol that circulates in
the blood. Commonly called “bad” cholesterol. High LDL increases the
risk of heart disease. An LDL less than 100 mg/dl is considered
optimal,100-129 mg/dl is considered near or above optimal, 130-159 mg/dl is
considered borderline high, 160-189 mg/dl is considered high, and 190 mg/dl or
greater is considered very high.
Lumbalgia: A general term meaning low back pain (See Low Back Pain).
Lumbar: The lower five weight bearing vertebrae that are located between
the thoracic vertebrae and the sacrum.
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