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Questions and Answers
What is the role of alpha motor neurons and their axons in the central nervous system?
What is the role of alpha motor neurons and their axons in the central nervous system?
- To regulate autonomic functions such as heart rate and blood pressure
- To transmit sensory information from the periphery to the CNS
- To integrate cognitive functions such as attention and memory
- To connect the CNS to skeletal muscle contraction units (correct)
What is the term for the loss of muscle bulk due to damage to the nervous system?
What is the term for the loss of muscle bulk due to damage to the nervous system?
- Muscle hypertrophy
- Disuse atrophy
- Neurogenic atrophy (correct)
- Muscle dystrophy
What is the term for quick twitches of muscle fibers of a single motor unit that are visible on the surface of the skin?
What is the term for quick twitches of muscle fibers of a single motor unit that are visible on the surface of the skin?
- Tetany
- Fibrillations
- Fasciculations (correct)
- Muscle cramps
What is the term for spontaneous contraction of a single muscle fiber?
What is the term for spontaneous contraction of a single muscle fiber?
What is the term for abnormally low resistance to passive stretch?
What is the term for abnormally low resistance to passive stretch?
What is the term for lack of resistance to passive stretch?
What is the term for lack of resistance to passive stretch?
What primarily characterizes a lower motor neuron lesion (LMNL)?
What primarily characterizes a lower motor neuron lesion (LMNL)?
Which structures are responsible for fine-tuning the coordination of movement during its execution?
Which structures are responsible for fine-tuning the coordination of movement during its execution?
Where do the cell bodies of lower motor neurons typically reside?
Where do the cell bodies of lower motor neurons typically reside?
Which type of neurons send impulses to lower motor neurons to exert control?
Which type of neurons send impulses to lower motor neurons to exert control?
Which type of motor neurons have their origin in the cerebral cortex and brainstem?
Which type of motor neurons have their origin in the cerebral cortex and brainstem?
Which anatomical station is affected in a lower motor neuron lesion involving the anterior horn cell (AHC)?
Which anatomical station is affected in a lower motor neuron lesion involving the anterior horn cell (AHC)?
Which type of neuron is responsible for transmitting impulses from the cerebral cortex to synapse with lower motor neurons?
Which type of neuron is responsible for transmitting impulses from the cerebral cortex to synapse with lower motor neurons?
What role do muscle receptors play in the execution of movement?
What role do muscle receptors play in the execution of movement?
What is the primary role of lower motor neurons?
What is the primary role of lower motor neurons?
Which of the following describes the axons of alpha motor neurons?
Which of the following describes the axons of alpha motor neurons?
How do the axons of alpha motor neurons affect skeletal muscles?
How do the axons of alpha motor neurons affect skeletal muscles?
Where are the cell bodies of alpha and gamma motor neurons located?
Where are the cell bodies of alpha and gamma motor neurons located?
What function do gamma motor neurons primarily serve in skeletal muscle?
What function do gamma motor neurons primarily serve in skeletal muscle?
Which muscle fiber type is most numerous and involved in muscle contraction?
Which muscle fiber type is most numerous and involved in muscle contraction?
What distinguishes gamma motor neurons from alpha motor neurons concerning their innervation?
What distinguishes gamma motor neurons from alpha motor neurons concerning their innervation?
What is the relationship between motor nuclei of cranial nerves and lower motor neurons?
What is the relationship between motor nuclei of cranial nerves and lower motor neurons?
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