Transcript The Motor System: Quiz Game

The Motor System
Neuro Quiz
Identify the correct question
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 Michael McKeough 2008
Motor System
Neuro Quiz
Dorsolateral
Motor
System
Ventromedial
Motor
System
Motor
Neurons
Misc.
Motor
Control
Centers
100
100
100
100
100
200
300
400
200
300
400
200
300
400
200
300
400
200
300
400
500
500
500
500
500
Click category value to begin.
Dorsolateral Motor System
100
Learned, willed, skilled movements,
particularly of the hand.
What are the types of movement
(functions) controlled by the
dorsolateral motor system?
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Dorsolateral Motor System
200
The cell bodies of these neurons are
located in somatically organized areas
of the precentral gyrus.
The axons of these neurons travel in
the lateral corticospinal tract.
What are upper motor neurons?
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Dorsolateral Motor System
300
The cell bodies of these neurons are
located in somatically organized
areas of the ventral horn.
The axons of these neurons travel in
the peripheral nervous system and
innervate skeletal muscle.
What are lower motor neurons?
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Dorsolateral Motor System
400
Upper motor neurons cross the
midline (decussate) after passing
through this structure.
What is the medullary pyramid?
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Dorsolateral Motor System
500
Approximately 10% of upper motor
neurons have this relationship with
lower motor neurons.
What are monosynaptic connections?
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Ventromedial Motor System
100
These are the types of movement
(functions) controlled by the
ventromedial motor system.
What are tone, posture, and
associative movement?
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Ventromedial Motor System
200
These tracts comprise the
ventromedial motor system.
What are the tectospinal,
reticulospinal, vestibulospinal, and
ventral (anterior) corticospinal tracts?
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Ventromedial Motor System
300
Upper motor neurons in the
ventromedial motor system terminate
here.
What are the ventromedial lower
motor neuron pools, bilaterally?
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Ventromedial Motor System
400
This tract is located in the anterior
column (funiculus) and consists of
upper motor neurons originating in
the ipsilateral primary motor cortex.
What is the ventral (anterior)
corticospinal tract?
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Ventromedial Motor System
500
This pathway originates in the
brainstem, descends in the lateral
column (funiculus) and is concerned
with the control of posture
(particularly extensor muscles) as
well as the coordination of head and
eye movement.
What is the lateral vestibulospinal
tract?
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Motor Neurons
100
They convey movement commands
from motor control centers in the
cortex and brainstem to lower motor
centers located at segmental levels
of the neuraxis.
What are upper motor neurons ?
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Motor Neurons
200
They are located in the peripheral
nervous system and convey
movement commands from cranial
nerve nuclei or the ventral horn of
the spinal cord to skeletal muscle in
the head and body, respectively.
What are lower motor neurons ?
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Motor Neurons
300
They are located in the peripheral
nervous system and convey
movement commands from cranial
nerve nuclei or the ventral horn of the
spinal cord to extrafusal muscle fibers in
the head and body, respectively.
What are alpha lower motor neurons?
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Motor Neurons
400
They are located in the peripheral nervous
system and convey movement commands
from segmental motor control centers to
intra- and extrafusal muscles fibers,
simultaneously.
They couple the alpha and gamma motor
systems
They are more common in reptiles than
mammals.
What are beta lower motor neurons?
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Motor Neurons
500
They increase the sensitivity of
intrafusal muscles fibers to the phasic
portion of a change in muscle length.
What are dynamic gamma motor
neurons?
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Miscellaneous
100
This physiological mapping of the
cortex depicts a distorted
representation of the body.
Body parts are portrayed
proportional to the amount of brain
space dedicated to the control of
movement of that body part.
What is the motor homunculus?
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Miscellaneous
200
This spinal pathway originates in the
contralateral cerebral cortex and is
concerned with the control of
manipulation and fractionated
movement of distal limb segments
(particularly the hand).
What is the lateral corticospinal
tract?
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Miscellaneous
300
This pathology causes brain damage
that produces limitations in the ability to
move due to paresis and spasticity.
The movement deficits caused by this
pathology appear on the side of the
body opposite the brain damage.
What is a stroke or cerebrovascular
accident?
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Miscellaneous
400
The type of hand movement controlled
by the corticospinal tract.
Independent control of individual digits
including terminal opposition of the
thumb and individual digits.
What is the fractionated movement?
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Miscellaneous
500
This system auto-regulates
(reflexively) joint position.
This system provides feedback about
the alpha motor system (muscle
tension and muscle length).
What is the gamma motor system?
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Motor Control Centers
100
Located in the precentral gyrus.
Somatotopically organized.
Controls learned, willed, skilled
movements of the contralateral body.
What is the primary motor cortex?
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Motor Control Centers
200
Located in the cortex of the frontal
lobe.
Responsible for controlling voluntary
eye movement.
What is the frontal eye field?
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Motor Control Centers
300
Located in the cortex of the frontal
lobe, usually in the left hemisphere.
Responsible for speech production.
Lesions here cause non-fluent
(productive) aphasia.
What is Brocha’s area?
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Motor Control Centers
400
Located at the base of the
telencephalon in both hemispheres.
Responsible for controlling initiation,
termination, and scaling of internally
generated movements.
Lesions here cause Parkinson's
disease.
What are the basal ganglia?
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Motor Control Centers
500
Located on the dorsal surface of the
brainstem.
Responsible for the timing and
coordination of complex movements
and detecting movement errors.
What is the cerebellum?
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