When the signal reaches the axon terminals, the electrical charge changes once more: instead of sodium ions, it is the positively charged calcium ions that enter the extra-permeable cell membrane.

The discovery, which is published in the scientific journal Neuron, ... (Medical Xpress) -- Research from Karolinska Institutet shows that the human olfactory bulb ...

The human olfactory bulb – a structure in the brain that processes sensory input from the nose – differs from that of other mammals in that no new neurons are formed in this area after birth.