Test Questions Flashcards
What type of effects do seizures produce?
seizures produce both somatic and autonomic effects
What is epilepsy?
A disease of the nervous system
Which cranial nerve does VNS stimulate?
number 10
What type of fibers is the left Vagus nerve composed of?
Mainly afferent - 80% sensory
Where is the VNS lead located?
Above the cardiac branch of Vagus nerve and below the laryngeal nerve
What are the two types of nerve cells?
Neurons which are excitable
Glial – which are non-excitable that support and protect neurons
What is a synapse?
A.k.a. the synaptic cleft is the space between the neurons because neurons do not touch
What is a myelin sheath?
Fatty white substance on axon that speeds up impulses from cell body down the axon
What is faster - a myelinated axon or an unmyelinated axon
A myelinated axon produces a faster nerve impulse
Is the goal of VNS to stimulate A, B or C fibers?
The goal is to saturate a fibers
What is an action potential?
An action potential is a short lasting event in which the electrical membrane potential of a cell rapidly rises and falls.
also known as nerve impulses or spikes
What is resting potential?
When nerve fibers are not transmitting a signal they have a resting membrane potential.
The resting is an important part of seizures because the body compensates for the uptick in energy. Sometimes overcompensates with postictal period
What is GABA?
It is an inhibitory neurotransmitter
What is the name of procedure that separates right and left hemispheres?
Corpus Callosotomy
What are the four lobes?
Frontal, parietal, occipital, Temporal
