Download Understanding Brain Tumors and Seizure Disorders: Definitions and Types and more Quizzes Psychology of Human Development in PDF only on Docsity!
Tumor
mass of cells with uncontrolled growth TERM 2
Malignant Tumor
DEFINITION 2 Cancerous, lacks distinct border, can metastasize TERM 3
Benign Tumor
DEFINITION 3 distinct border, does not metastasize TERM 4
Metastasis
DEFINITION 4 process in which cells break off a tumor, travel through the vascular system and grow elsewhere (lodge in capillaries, ducts, lymph nodes)*Metastisizing cancers: ovarian, prostate, breast TERM 5
Brain Damage caused by
Tumors
DEFINITION 5 Damage to brain tissue by:-Compression: whether benign or malignant -directly: taking up space -indirectly: block CSF
Meningioma
benign tumor composed of the cells that constitute the meninges TERM 7
Glioma
DEFINITION 7 a cancerous brain tumor composed of one of several types of glial cells-fast growing-starts in the brain or spine. TERM 8
Neurinoma
DEFINITION 8 Shwann cells or cells of connective tissue covering the cranial nerves TERM 9
Angioma
DEFINITION 9 -cells of blood vessels TERM 10
Pinealoma
DEFINITION 10 cells of pineal gland-parenchymal cells
Absence Seizure
(petit mal)-often seen in children-characterized by periods of inattention, which are not subsequently remembered TERM 17
Atonic Seizure
DEFINITION 17 (temporary paralysis) TERM 18
Status Epilepticus
DEFINITION 18 series of seizures without regaining consciousness TERM 19
Tonic Phase
DEFINITION 19 -all skeletal muscles contract forcefully-air forced out of lungs-unconscious TERM 20
Clonic Phase
DEFINITION 20 -rigidity-muscles jerk convulsively-autonomic activity (sweat & salivation)-muscles relax-breathing-sleep ~15minutes
Neurochemical Implications
-neurons begin firing at aura-spreads to regions around focus-through corpus callosum to contralateral cortex, basal ganglia, thalamus, reticular formation-SYMPTOMS BEGIN- subcortical regions feedback excitement to cortex-motor neurons fire -> tonic phase begins TERM 22
Seizure End
DEFINITION 22 diencephalon send inhibition to cortex in bursts (clonic phase)-inhibition helps end seizure TERM 23
Implications
DEFINITION 23 -amount of damage correlated w/ number and severity-50% show hippocampal damage-excessive glutamate release- scarring-ETOH & Barb withdrawal can lead to seizures - sudden release from inhibiting effects of drugs makes brain hyper-excitable TERM 24
Anticonvulsants
DEFINITION 24 increase inhibitory synapses-Gabapentin (neurontin)- Neuralgia (nerve pain)-mood disorders, anxiety TERM 25
Cerebrovascular Accidents
DEFINITION 25 (Strokes)
