drowsiness

n. a state of low alertness characterized by lowered frontal lobe (executive) functioning, difficulty in exerting mental effort, and an involuntary tendency for rapid skeletal muscle inhibition to occur. Electroencephalography shows intermittent sleep brain waves, including delta waves. See also hypersomnia; somnolence.

Browse dictionary by letter

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

Psychology term of the day

January 28th 2025

extracellular space

the fluid-filled space in an organism that lies outside the plasma membrane of cells.