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Questions and Answers
What is the source of the signal that activates the Ia interneuron?
What is the source of the signal that activates the Ia interneuron?
- II afferent signal
- III afferent signal
- Ib afferent signal
- Ia afferent signal (correct)
Which muscle is affected by the same Ia afferent signal that activates the Ia interneuron?
Which muscle is affected by the same Ia afferent signal that activates the Ia interneuron?
- Tibialis anterior
- Gastrocnemius
- Hamstrings
- Quadriceps (correct)
What is the function of the Ia afferent signal?
What is the function of the Ia afferent signal?
- Inhibition of the quadriceps
- Excitation of the quadriceps (correct)
- Inhibition of the Ia interneuron
- Excitation of the hamstrings
What is the relationship between the Ia afferent signal and the quadriceps contraction?
What is the relationship between the Ia afferent signal and the quadriceps contraction?
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What is the role of the Ia interneuron in relation to the quadriceps contraction?
What is the role of the Ia interneuron in relation to the quadriceps contraction?
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Study Notes
Basal Ganglia
- The basal ganglia consists of the caudate nucleus and putamen, together forming the striatum, and the globus pallidus
Cerebral Cortex
- The lobes of the cerebral cortex contain discrete areas that can be distinguished by their cytoarchitecture and are associated with specialized functions
- The cerebral cortex can be functionally divided into three general areas that span across both hemispheres:
- Sensory area
- Motor area
- Associative area
Motor Control
- Motor control arcs are often mediated by the spinal cord
- In the spinal cord, a sensory neuron synapses with and activates a motor neuron
- The Ia interneuron is activated by the same Ia afferent signal that causes the quadriceps to contract
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Description
This quiz covers the structures and functions of the basal ganglia, cerebral cortex, and motor control systems. It explores the different areas and their specialized functions.
