The top pair of the two pair of bump on the posterior surface of the midbrain. Plays a role in vision, perhaps a part of the role vision plays in orienting us to the world, and eye movements. Sylvian Acqueduct A connecting path for cerebral spinal fluid between the III and IV ventricles . The deep groove or sulcus that marks the boundary between the frontal lobe and temporal lobe. At this point, where the relationship of the two neurons is one of contact only, the impulse traveling in the first neuron initiates an impulse in the second neuron.
Synapses are polarized, i.e., the impulses pass in one direction only.
They are susceptible to fatigue, offer a resistance to the passage of impulses, and are markedly susceptible to the effects of oxygen deficiency, anesthetics, and other agents, including therapeutic drugs and toxic chemicals. The space between the two neurons that form the synapse. Synaptic Vesicle A membrane structure in the axon terminal that contains the neurotransmitters until they are released. V Voltage A difference in electrical charge between two locations. One region is more positive than the other.