MUSCLE NERVE CARTILAGE BONE
GANGLIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Efferent neurons from the globus pallidus that influence the activity of the motor areas of the cortex arise from the ____ segment and relay in the ____ before reaching the cortex.
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internal; VA/VL thalamic nuclei
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external; VA/VL thalamic nuclei
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internal; substantia nigra pars compacta
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external; substantia nigra pars compacta
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internal; substantia nigra pars reticulata
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Explanation:
Detailed explanation-1: -Glutamate is also the excitatory neurotransmitter released from terminals of the subthalamic neurons projecting to the pallidum, particularly to the internal layer of the globus pallidus, and from the axon terminals of thalamic neurons that send fibers mainly to the cortex.
Detailed explanation-2: -Thus, neurons leave the globus pallidus and form a pathway (via a relay in the thalamus) that can influence neurons in the motor cortex that are responsible for initiating movements. It is through this pathway that the basal ganglia are thought to be able to regulate motor behavior.
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