Glossary A
Glossary A
Alpha 2-adrenergic agonist refers to a drug that reduces the activity of the neurotransmitter norepinephrine by stimulating certain receptors within the central nervous system (central presynaptic alpha 2-adrenergic receptors). The release of norepinephrine triggers action within the sympathetic nervous system. This part of the nervous system regulates certain involuntary activities during stress, such as increasing the heart rate, deepening breathing, and raising blood pressure. Norepinephrine also plays a role in regulating mood and emotion.
The administration of Alpha 2-adrenergic agonists may result in a reduced heart rate and lowered blood pressure and have depressive or sedative effects.
Alpha activity refers to the rhythmical, medium-frequency activity of the electroencephalogram, usually indicating a state of quiet relaxation.
Alpha bias refer to the bias that occurs by separating women and men into two (2) specific categories, running the risk of treating women as unequal to men.
Alpha level in a hypothesis test is the criterion for statistical significance that defines the maximum probability that the research result was obtained simply by chance.
Alpha level is also known as Level of significance.
Alpha wave is defined as the the brain wave of 8 to 12 cycles per second that occurs when an individual is awake but deeply relaxed, usually with the eyes closed