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Glossary of Medical and Scientific Terms

Note: The glossary is only being started. Several terms do not yet have definitions written for them. If you would like a term defined, and do not see it here, please let me know and I'll put it on my list. Many thanks to Dr. R. N. Auer, MD, PhD, FRCPC for taking time out of his busy schedule to formulate several of these definitions.

Select a Letter Below--Or Just Browse

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

Select the first letter of the word from the list above to jump to appropriate section of the glossary. If the term you are looking for starts with a digit or symbol, choose the '#' link.

- A -

acetylcholine

acute

having a sudden onset

adrenergic

aneurysm

a weakness in the wall of a blood vessel

angiography

an imaging technique that provides a picture, called an angiogram, of blood vessels.

amnesia

impairment or loss of memory

angina

see coronary angina

angina pectoralis

see coronary angina

angor animi

anoxia

loss of oxygen

antagonist

a substance that inhibits the function of certain neuron receptor sites--opposite of agonist

arteries

the blood vessels that carry blood from the heart. Arteries carry the full cardiac pressure. See also veins.

ataxia

ataxic gait

aura

a symptom of classic migraine headache in which the patient sees flashing lights or zigzag lines, or may temporarily lose vision


- B -

BAM

abbreviation and short term for Basilar Artery Migraine.

 

basilar artery migraine

migraine, occurring mostly in young women, children and adolescents (though also occurring in others) that involves a disturbance of the basilar artery and the vertebrobasilar circulatory system. Brainstem ischemia often results. Symptoms include vertigo, double vision, and poor muscular coordination.

benign exertional headache

headache brought on by running, lifting, coughing, sneezing, or bending.

beta blockers

Bickerstaff's Migraine

name first given Basilar Artery Migraine.

biofeedback

a technique in which patients are trained to gain some voluntary control over certain physiological conditions, such as blood pressure and muscle tension, to promote relaxation. Thermal biofeedback helps patients consciously raise hand temperature, which can sometimes reduce the number and intensity of migraines.

brainstem

brainstem stroke


- C -

calcium channel blockers

cerebral cortex

a thin layer of "gray matter" covering the cerebral hemispheres of the brain. It plays a role in higher functions of the brain, including behavior.

cluster headaches

intensely painful headaches-occurring suddenly and lasting between 30 and 45 minutes-named for their repeated occurrence in groups or clusters. They begin as minor pain around one eye and eventually spread to that side of the face.

coma

computer tomography (CT)

an imaging technique that uses X-rays and computer analysis to provide a picture of body tissues and structures.

coronary angina

cortical functions

see higher integrative functions

cortical spreading depression


- D -

daymare

depersonalization

derealization

dihydroergotamine

a drug that is given by to treat cluster headaches and other forms of migraine. It is a form of the antimigraine drug ergotamine tartrate..Forms of ergotamine tartrate are vasoconstrictors and are potentially dangerous when used on patients with basilar artery migraine.

diplopia

disethesia

dizziness

drop attack

dysphasia


- E -

electroencephalogram (EEG)

a technique for recording electrical activity in the brain. Useful in differential diagnosis of basilar artery migraine to rule out epilepsy and/or other neurological disorders.

electromyography (EMG)

a special recording technique that detects electric activity in muscle. Patients are sometimes offered a type of biofeedback called EMG training, in which they learn to control muscle tension in the face, neck, and shoulders.

endorphins

naturally occurring painkilling chemicals. Some scientists theorize that people who suffer from severe headache have lower levels of endorphins than people who are generally pain free.

ergotamine

see ergotamine tartrate

ergotamine tartrate

a drug that is used to control the painful dilation stage of migraine. Dangerous when used for treatment of basilar artery migraine, as it is a vasoconstrictor. See also dihydroergotamine.

expressive aphasia


- F -

frontal lobe


- G -

(empty)


- H -

hemianopia

hemiparesis

hemiplegia

hemiplegic migraine

a type of migraine causing temporary paralysis on one side of the body (hemiplegia)

higher integrative functions

histamine

homeostasis

Horner's syndrome

hypnagogic hallucination

a hallucination occuring between the stages of wakefulness and sleep

hypothalamus

a portion of the brain which controls many of the functions of homeostasis, such as temperature regulation, as well as endocrine processes, many bodily functions, sleep-wake cycles, and appetite.


- I -

infarct

a localized area of of decay or ischemic necrosis in a tissue, vessel, organ or part, produced by occlusion of the blood supply. See also lacunar infarcts.

infarcted

having suffered an infarct, such as an area of tissue

infarction

a localized area of decay in a tissue, vessel, organ or part.

inflammatory headache

a headache that is a symptom of another disorder, such as sinus infection, and is treated by curing the underlying problem.

inter-ictal

referring to the period of time between seizures or attacks

ischemia

interruption in the blood supply to an area

ischemic

having poor blood supply to an organ or part


- J -

(empty)


- K -

(empty)


- L -

lacunar infarcts

small infarcts that produce a space or cavity

lateral

referring to the side

lobe

a section of the brain, such as the Frontal Lobe or Occipital Lobe


- M -

magnetic resonance imaging (MRI)

an imaging technique that uses radio waves, magnetic fields, and computer analysis to provide a picture of body tissues and structures.

medulla oblongata

meninges

the three membranes (the arachnoid, the dura mater, and the pia mater) that cover the brain

migraine

a vascular headache believed to be caused by blood flow changes and certain chemical changes in the brain leading to a cascade of events - including constriction of arteries supplying blood to the brain and the release of certain brain chemicals - that result in severe head pain, stomach upset, and visual disturbances.

migraine equivalent

migraineur

one who suffers from migraines

migrainous neuralgia

migralepsy

mosaic vision

motor

pertaining to the actions and modulation of the muscles

muscle-contraction headaches

headaches caused primarily by sustained muscle tension or, possibly, by restricted blood flow to the brain. Two forms of muscle-contraction headache are tension headache, induced by stress, and chronic muscle-contraction headache, which can last for extended periods, involves steady pain, and is usually felt on both sides of the head.

myoclonic jerks


- N -

necrosis

death of individual cells or of a group of cells, or of an area of tissue

necrotized

dead tissue

negative scotoma

see scotoma

neuralgia

neurological

of or pertaining to the nervous system

neuromuscular

pertaining to the junction of nerves and muscles

neuronal

of or pertaining to neurons

neuron

a "nerve cell," an information-conducting cells of the nervous system. Cells in the brain consist of neurons and "glial cells."

neuropathological

pertaining to disease of the nervous system

neuropathy

disease of neurons

neurotransmitter

a chemical "messenger" used for communicate between neurons

neurotropic

pertaining to the growth of neurons

nociceptors

the endings of pain-sensitive nerves that, when stimulated by stress, muscular tension, dilated blood vessels, or other triggers, send messages up the nerve fibers to nerve cells in the brain, signaling that a part of the body hurts.


- O -

(empty)


- P -

paraesthesia

parasthesia

parasthesia

parasympathetic

parietal lobe

paroxism

positive scotoma

see scotoma

precordial

of or relating to the area of the chest over the heart, called the precordium

predisposition

pseudomigraine

prodrome

prosopagnosia

prostaglandins

naturally occurring pain-producing substances thought to be implicated in migraine attacks. Their release is triggered by the dilation of arteries. Prostaglandins are extremely potent chemicals involved in a diverse group of physiological processes.


- Q -

occipital lobe

ophthalmoplegic migraine

a form of migraine felt around the eye and associated with a droopy eyelid, double vision, and other sight problems.


- R -

receptive aphasia

Reversible Ischemic Neurological Deficit

RIND

see Reversible Ischemic Neurological Deficit


- S -

scotoma

serotonin

a key neurotransmitter that acts as a powerful constrictor of arteries, reducing the blood supply to the brain and contributing to the pain of headache.

sinusitis

an infection, either viral or bacterial, of the sinus cavities. The infection leads to inflammation of these cavities, causing pain and sometimes headache.

spasm

a sudden, usually violent involuntary muscular contraction

status migrainosus

a rare, sustained, and severe type of migraine, characterized by intense pain and nausea and often leading to hospitalization of the patient.

stupor

syncope


- T -

temporal lobe

thermography

a technique sometimes used for diagnosing headache in which an infrared camera converts skin temperature into a color picture, called a thermogram, with different degrees of heat appearing as different colors.

temporomandibular joint dysfunction

a disorder of the joint between the temporal bone (above the ear) and the lower jaw bone that can cause muscle-contraction headaches.

TIA

see transient ischemic attack

tic douloureux

see trigeminal neuralgia

tinnitus

ringing in the ears. Can be caused by any of a number of underlying problems.

traction headaches

headaches caused by pulling or stretching pain-sensitive parts of the head, as, for example, when eye muscles are tensed to compensate for eyestrain.

transient global amnesia (TGA)

see amnesia

transient ischemic attack (TIA)

tricyclic andidepressants (TCAs)

a family of drugs, originally used to treat depression, but often used as a prophylactic treatment for migrane, including basilar artery migraine. Commonly prescribed TCAs include amitryptylene and nortriptylene.

trigeminal neuralgia

a condition resulting from a disorder of the trigeminal nerve. Symptoms are headache and intense facial pain that comes in short, excruciating jabs.

trigger


- U -

(empty)


- V -

vagal

of or relating to the vagus nerve, or "wandering nerve"

vagotonic

vagus nerve

also called the "wandering nerve," refers to either of the two longest cranial nerves. The vagus nerve is involved in, and essential for, many functions of the body, including swallowing and speech.

vascular headaches

headaches caused by abnormal function of the brain's blood vessels or vascular system. Migraine is a type of vascular headache.

vasoconstrictor

vasomotor system

the component of the nervous system that controls the dialation and contraction of blood vessels

vasovagal

vegetative

veins

the vessels that carry blood to the heart. See also arteries.

verapamil

a calcium channel blocker used for prevention of Basilar Artery Migraine, as well as migraine

vertebrobasilar insufficiency (VBI)

vertigo

vestibular

of or relating to the inner ear, specifically the "vestibule" of the inner ear


- W -

(empty)


- X -

(empty)


- Y -

(empty)


- Z -

(empty)


- # -

5-hydroxytryptamine

serotonin

Many more terms and definitions to come!

 



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