Physio -Chapter 9: Motor Control
Question and answers rated A+ 2025
Which of the following best describe the concept of motor learning? - correct
answer a three stage process by which people learn to make coordinated
movements
Motor learning is a three-step process: deciding on what movement is
needed, memory of similar movements in the past, collection of appropriate
sensory information, and then execution of movement.
Which of the following are not part of the motor cortex? - correct answer
basal nuclei
Upper motor neurons originate in the cerebral cortex of the brain or in areas
within the brain stem. The basal nuclei on the other hand, is located deep
within the cerebrum.
How would motor memory help in learning a new motor task similar to another
motor task that you are familiar with? - correct answer The premotor cortex,
along with the primary motor cortex, stores motor memory, which occurs when
a muscle movement has been repeated so many times that it is automatic.
The premotor cortex also functions to control muscle movements in context.
Therefore movements that require similar skeletal muscle activation would
also be controlled by nerve impulses from the premotor cortex.
Modification upper motor neural impulses by which of the following prevents
excessive unnecessary muscle movements? - correct answer basal nuclei
inhibition
, Because the thalamus constantly wants to send excitatory impulses to the
motor cortex, which would result in unwanted or unnecessary muscle
movements, the basal nuclei helps to modulate these impulses from the motor
cortex.
Which of the following correctly matches the motor neuron type with the
muscle fiber type it innervates? Select all that apply. - correct answer - γ-
motor neurons → intrafusal skeletal muscle fibers
- α-motor neurons → extrafusal skeletal muscle fibers
There are two types of lower motor neurons that participate in the motor
pathway: alpha (α)-neurons and gamma (γ)-neurons. α-motor neurons
innervate extrafusal skeletal muscle fibers and γ-motor neurons innervate
intrafusal skeletal muscle fibers.
Would damage to γ-motor neurons result in an inability to contract the
muscle? - correct answer no, it would not necessarily inhibit the ability to
contract the muscle. Γ-motor neurons innervate intrafusal skeletal muscle
fibers. intrafusal skeletal muscle fibers contract only marginally and serve
more as proprioceptor, sending feedback regarding muscle stretch via the
muscle spindles. whereas α-motor neurons innervate extrafusal skeletal
muscle fibers, which are the actual skeletal muscle fibers involved in muscle
contraction
How does a larger motor unit differ from a smaller motor unit? - correct
answer A large motor unit innervates many more muscle fibers than a small
motor unit.
Motor units can be large or small depending on the number of skeletal muscle
fibers that each motor neuron innervates. A large motor unit consists of a
single α-motor neuron controlling many muscle fibers, whereas a small motor
unit consists of a single α-motor neuron controlling a few muscle fibers.
Question and answers rated A+ 2025
Which of the following best describe the concept of motor learning? - correct
answer a three stage process by which people learn to make coordinated
movements
Motor learning is a three-step process: deciding on what movement is
needed, memory of similar movements in the past, collection of appropriate
sensory information, and then execution of movement.
Which of the following are not part of the motor cortex? - correct answer
basal nuclei
Upper motor neurons originate in the cerebral cortex of the brain or in areas
within the brain stem. The basal nuclei on the other hand, is located deep
within the cerebrum.
How would motor memory help in learning a new motor task similar to another
motor task that you are familiar with? - correct answer The premotor cortex,
along with the primary motor cortex, stores motor memory, which occurs when
a muscle movement has been repeated so many times that it is automatic.
The premotor cortex also functions to control muscle movements in context.
Therefore movements that require similar skeletal muscle activation would
also be controlled by nerve impulses from the premotor cortex.
Modification upper motor neural impulses by which of the following prevents
excessive unnecessary muscle movements? - correct answer basal nuclei
inhibition
, Because the thalamus constantly wants to send excitatory impulses to the
motor cortex, which would result in unwanted or unnecessary muscle
movements, the basal nuclei helps to modulate these impulses from the motor
cortex.
Which of the following correctly matches the motor neuron type with the
muscle fiber type it innervates? Select all that apply. - correct answer - γ-
motor neurons → intrafusal skeletal muscle fibers
- α-motor neurons → extrafusal skeletal muscle fibers
There are two types of lower motor neurons that participate in the motor
pathway: alpha (α)-neurons and gamma (γ)-neurons. α-motor neurons
innervate extrafusal skeletal muscle fibers and γ-motor neurons innervate
intrafusal skeletal muscle fibers.
Would damage to γ-motor neurons result in an inability to contract the
muscle? - correct answer no, it would not necessarily inhibit the ability to
contract the muscle. Γ-motor neurons innervate intrafusal skeletal muscle
fibers. intrafusal skeletal muscle fibers contract only marginally and serve
more as proprioceptor, sending feedback regarding muscle stretch via the
muscle spindles. whereas α-motor neurons innervate extrafusal skeletal
muscle fibers, which are the actual skeletal muscle fibers involved in muscle
contraction
How does a larger motor unit differ from a smaller motor unit? - correct
answer A large motor unit innervates many more muscle fibers than a small
motor unit.
Motor units can be large or small depending on the number of skeletal muscle
fibers that each motor neuron innervates. A large motor unit consists of a
single α-motor neuron controlling many muscle fibers, whereas a small motor
unit consists of a single α-motor neuron controlling a few muscle fibers.
