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.
Electrical signal that travels along the axon and causes release of chemicals from the terminal buttons. When the action potential reaches the end of the axon, synaptic vesicles open and release neurotransmitters which are picked up by the receiving dendrites. Action potentials=all or none (either fires or not)