Quiz 2 Questions Flashcards
To treat medically intractable epilepsy, some patients undergo a surgical procedure where a specific structure in the brain is severed or removed. After the procedure, the left and right hemispheres of the brain can no longer communicate directly, leading to a condition known as “split-brain.”
Based on the description of “split-brain” patients, which part of the brain is affected during the operation?
a) Cerebellum
b) Hippocampus
c) Amygdala
d) Corpus callosum
d) Corpus callosum
The myelin sheath is known to increase the speed of neural signal transmission. This is achieved by:
a) Facilitating continuous electrical conduction along the axon.
b) Directly generating action potentials along the axon.
c) Preventing ion leakage across the axon membrane.
d) Allowing impulses to jump between nodes.
d) Allowing impulses to jump between nodes.
During the depolarization phase of an action potential, which statement is true?
a) Sodium-potassium pumps actively depolarize the neuron by expelling potassium ions.
b) Sodium channels open, allowing sodium ions to enter the neuron, making the interior more positive.
c) Potassium ions enter the neuron, causing the interior to become less negative.
d) Both sodium and potassium ions flow into the neuron, neutralizing the resting potential.
b) Sodium channels open, allowing sodium ions to enter the neuron, making the interior more positive.
Which statement best describes the role of the frontal lobe?
a) It is the primary center for processing auditory information and language comprehension.
b) It contains regions that coordinate planning and execution of voluntary movements, including speech.
c) It is responsible for processing incoming sensory information from the body.
d) It plays a key role in visual processing and recognition of spatial patterns.
b) It contains regions that coordinate planning and execution of voluntary movements, including speech.
In the 10-20 system of electrode placement for EEG, the C4 electrode is positioned in the right hemisphere, 20% lateral from the sagittal midline and 20% away from the right preauricular points.
True or false?
False
John is interacting with a new patient who appears to have difficulty in coordinating the fine motor movements required for speech, resulting in slurred and imprecise articulation. However, their ability to understand language and form coherent sentences remains intact. He suspects that the patient’s basal ganglia is likely not working properly. Could it be true?
True or false?
True
The visual cortex, located in the occipital lobe, processes visual information that can aid in speech comprehension.
True or false?
True
The following sentence will likely trigger a P400 peak in the signals obtained via EEG.
“She doesn’t have the slightest idea where is the book.”
True or false?
False
