The resultant decreased plasma calcium causes hyperexcitability of the nervous system and weakened muscle contractions, which result in both tetany and paresis.
12.
Experiments in which scientists use a powerful magnet to stimulate neurons provide startling evidence that some people's brains are predisposed to hyperexcitability.
13.
For instance, if the dendrites of granule cells reconnect, it may be in a way ( through the laminar planes ) that allows hyperexcitability.
14.
This latter, seemingly contradictory, finding could be explained by hyperexcitability of CNS neurones resulting from neuroadaptive changes taking place during a heavy drinking bout.
15.
Hyperexcitability of central trigeminal spinal nucleus, thalamus, and cerebral cortex ) is believed to be involved in the pathophysiology of chronic tension-type headache.
16.
A 2-to 8-hour exposure leads to depressed central nervous system ( CNS ) activity, followed by hyperexcitability, tremors, and then seizures.
17.
Possibly by promoting sodium efflux from neurons, phenytoin tends to stabilize the threshold against hyperexcitability caused by excessive stimulation or environmental changes capable of reducing membrane sodium gradient.
18.
In this way, dendrotoxins prolong the duration of action potentials and increase acetylcholine release at the neuromuscular junction, which may result in muscle hyperexcitability and convulsive symptoms.
19.
At this stage, GABA A receptors and glycine receptors act as excitatory rather than inhibitory effectors on postsynaptic neurons, resulting in depolarization and hyperexcitability of neural networks.
20.
Sufferers often tend toward hyperexcitability of that brain area, he said, setting events that lead to the release of neurotransmitters, dilation of blood vessels, inflammation and pain.
