Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «L»:
Lou Gehrig disease
Lou Gehrig disease: Amyotrophic lateral sclerosis (ALS), a
classic motor neuron disease. Motor neuron diseases are progressive
chronic diseases of the nerves that come from the spinal cord
responsible for supplying electrical stimulation to the muscles. This
stimulation is necessary for the mov...
Louise Brown: See: Brown, Louise....
Louse-borne typhus: See: Typhus, epidemic....
Love pearls: Street name for alpha-ethyltryptamine....
Low back pain
Low back pain: Pain in the lower back area that can relate to problems with the lumbar spine, the discs between the vertebrae, the ligaments around the spine and discs, the spinal cord and nerves, muscles of the low back, internal organs of the pelvis and abdomen, or the skin covering the lumbar ar...
Low blood pressure
Low blood pressure: Any blood pressure that is below the normal expected for an individual in a given environment. Low blood pressure is also referred to as hypotension.
Low blood pressure is a relative term because the blood pressure normally varies greatly with activity, age, medications, and un...
Low blood sugar
Low blood sugar: A low blood level of the sugar
glucose. Also called hypoglycemia.
Hypoglycemia is only significant when it is associated
with symptoms. It has many causes including drugs such as insulin, liver disease, surgical absence of the
stomach, pre-diabetes, and rare tumors that release exce...
Low placenta: Location of the placenta in the lower part of the uterus
(womb) so that the placenta partially or completely covers the cervix. Also known as a
Low platelets: see thrombocytopenia. ...
Low tension glaucoma
Low tension glaucoma: See: Glaucoma, normal tension....
Low testosterone: Abnormally low levels of the male sex hormone testosterone
in the blood. Testosterone is produced by the testes and to a lesser
extent by the adrenal glands. Testosterone encourages the development of male
sexual characteristics at puberty, stimulates the activity of the male se...
Low vision: A visual impairment, not corrected by standard glasses, contact lenses, medicine, or surgery, that interferes with the ability to perform everyday activities. Most people develop low vision because of eye diseases such as cataracts, glaucoma, diabetic retinopathy or age-related macular d...
Low vision device
Low vision device: A devise to help to improve visual ability of a person with low vision. Low vision devices may be optical or non-optical. Optical devices such as a magnifying glass involve the use of lenses to improve vision whereas non-optical devices such as large print help bring images closer...
Low-grade lymphoma: A lymphoma that tends to grow and spread slowly, in contrast to an intermediate- or high-grade lymphoma which tends to grow and spread more quickly. Low-grade lymphomas include chronic lymphocytic lymphoma and follicular small cleaved cell lymphoma. Also called an indolent lympho...
Low-set ear: An ear positioned below its normal
location. Classified as a minor anomaly. Technically, the ear is low-set when the helix
(of the ear) meets the cranium at a level below that of a horizontal plane through both
inner canthi (the inside corners of the eyes). The presence of 2 or more min...