The frontal lobe contains most of the dopamine-sensitive neurons in the cerebral cortex. The dopamine system is associated with reward, attention, short-term memory tasks, planning, and motivation. Dopamine tends to limit and select sensory information arriving from the thalamus to the forebrain.
Na + concentration is lowered, indicating that Na + in-flux is responsible for the rising phase of the action po-tential. Their data also suggested that the falling phaseof the action potential was caused by a later increase inK+ permeability.
the major cation in intracellular fluid (ICF) accounting for over 90% of the body's potassium. Its many functions include a crucial role in the generation of the membrane potential and of an action potential. The level in the blood is regulated by the kidneys, under the influence of the hormone aldosterone.