click below
click below
Normal Size Small Size show me how
Spring Quiz 4
Masterbooks Intro to A&P Volume 3
Term | Definition |
---|---|
diencephalon | the portion of the brain between the cerebrum and the brainstem; composed of the thalamus and hypothalamus |
thalamus | relays sensory input from the spinal cord to the primary somatosensory cortex |
hypothalamus | controls many body functions that seem fairly automatic; one of the main regulators of homeostasis |
homeostasis | the body's tendency to maintain internal balance |
brain stem | consists of the midbrain, the pons, and the medulla oblongata |
medulla oblongata | located below the pons, where it connects the brain to the spinal cord |
reticular formation | a net-like collection of interconnected nuclei that runs through the midbrain, pons, and medulla |
cerebellum | helps us to maintain our balance |
subclavian arteries | located under the collarbones; supply blood to the arms |
stroke | occurs when cells in the brain are killed by loss of blood flow |
aneurysm | a dilated area on the wall of an artery; an area of weakness resembling a thin, weak section of a balloon |
electrocardiogram (ECG) | one way the electrical activity that makes your heart beat can be measured |
electroencephalogram (EEG) | one way the electrical activity of the brain can be measured |
delta waves | this pattern is the lowest frequency and occurs in deep sleep |
theta waves | in adults, these waves occur during meditation or drowsiness |
alpha waves | occur during wakeful but relaxed times |
beta waves | occur when the mind is active, like when concentrating or trying to communicate |
sleep | a state in which an individual achieves a degree of unconsciousness from which he or she can be roused |
rapid eye movement (REM) | the brain wave pattern during this phase of sleep is a high frequency pattern, reflecting an increase in neuronal activity |
amnesia | loss of memory; can result from trauma of severe illness |
synaptic plasticity | the ability of synapses to change their strength, resulting in the encoding of memories |