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22 Cards in this Set

  • Front
  • Back
T/F
Mechanosensory and nociceptive information from the face are relayed to the ventral posterior medial (VPM) nucleus of the thalamus.
True
One of your patients had a stroke one week ago. The focus of your treatment is to have him lift his partially paralyzed arm to place it on the table. Your strategy is to rely on repetitive movements of the same type to master the task. Which of the following aspects of neuroplasticity would be the basis of your treatment strategy?
Long-term potentiation
In a study of chemical synapse, a scientist finds a way to inhibit the influx of Ca++ in the presynaptic terminal. Which of the following statements is a direct consequence of this experiment?
The absence of Ca++ prevents the movement of synaptic vesicles toward the release of site
Which of the following classes of neurons transmit the information about temperature (warmth)?
C fibers
The following statements concerning the muscle spindle are correct except:
If the intrafusal fibers are relaxed, there is an increase in the rate of nerve impulses to the spinal cord
Which of the following neurotransmitters is the most common excitatory transmitter in the CNS?
Glutamate
A 30 yo woman comes to your clinic. The results of your examination are the following: absent two point discrimination over left lower and upper extremities, lack of proprioception over left upper and lower extremities. Pain and temperature sensation intact bilaterally. Voluntary movement intact bilaterally. Facial expression and sensation intact. What would you suspect is the problem?
Lesion at the level of the right medial lemniscus pathway.
A 21 yo soldier had a spinal cord injury in combat that resulted in a hemisection of the spinal cord, on the right side, at spinal level T10. Which of the following sensory deficit would be evident on examination below the level of the lesion?
ipsilateral touch and vibration deficits and contralateral pain and temperature deficit
This type of lesions would result in what type of sensory deficits below the level of the lesion?
The entire spinal cord is crossed out dark.
None of the answers are correct.
A 50 yo man suffers a stroke that resulted in an infarct of the rostral medulla (medially) on the right side of his brain directly superior to the nuclei cuneatus and gracilis. Which of the following sensory deficits would be present?
Absent touch and vibration on the left side of the body and normal pain and temperature on the right side of the body.
In most typical synapses many small vesicles containing neurotransmitter substances are found in the:
presynaptic terminal
The membrane ion channels of a postsynaptic neuron open after the release of a neurotransmitter from the presynaptic neuron. What type of ion channels are activated by this neurotransmitter?
Ligand-gated ion channels
Which of the following pathways is considered a Divergent pathway involve in slow pain?
spinomesencephalic pathway
T/F
The first order neuron in the dorsal column-medial leminicus pathway starts in the caudal medulla.
False
T/F
In general the rate of growth of a severed or crushed peripheral nerve is 5mm/day.
False
Match the structures/neurons involved in the column 1 with the sequence of transmission of sensory information along the pathway for discriminative touch and vibration.
Pacinian corpuscle
IA afferent
Fasciculus gracilis/cuneatus
nuclei gracilis/cuneatus
medial leminiscus pathway
ventral posterior lateral nuclei of thalamus
postcentral gyrus
Pacinian corpuscle- receptor potential
IA afferent- Dorsal Root Ganglion
Fasciculus gracilis/cuneatus- first order neuron cell body
nuclei gracilis/cuneatus- caudal equina
medial leminiscus pathway- second order neuron cell body
ventral posterior lateral nuclei of thalamus- third order neuron cell body
postcentral gyrus-destination of third order neuron
Which of the following spinal cord segments contains both gracilis and cuneatus fasciculi?
C3 spinal segment
T/F
The signals for discriminative touch and vibration travel up the spinal cord on the same side where the stimulus was applied
True
List three disorders that occur as a consequence of a defect in neural tube formation.
spina bifida, anencephaly, Arnold Chiari malformation
Which of the following describes the location of the cingulate gyrus?
it is the superior to the corpus collasum
Which of the following tissues is necessary for the development of the nervous system?
Ectoderm
A lesion in the right side of the upper medulla would result in which of the following sensory deficits?
Absence of any sensation on the left side of the body and face