Scelta multipla
Which part of the neuron carries the signal away from the cell body toward the synapse?
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4. Tissues & Histology
Nervous Tissue: The Neuron
Scelta multipla
In the context of nervous function, what does it mean if nerve fibers decussate?
A
They regenerate after injury.
B
They form a synapse with another neuron.
C
They increase the speed of nerve impulse transmission.
D
They cross from one side of the central nervous system to the other.
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Understand the term 'decussate': In anatomy, 'decussate' refers to the crossing of nerve fibers from one side of the central nervous system to the other.
Recognize the significance of decussation: This process is crucial for the coordination of sensory and motor functions, allowing signals to be processed on the opposite side of the brain.
Identify examples of decussation: Common examples include the optic chiasm, where optic nerves cross, and the pyramidal decussation, where motor fibers cross in the medulla oblongata.
Consider the implications of decussation: It ensures that each hemisphere of the brain can control and receive information from the opposite side of the body.
Clarify misconceptions: Decussation does not involve regeneration, synapse formation, or increased speed of transmission; it specifically refers to the crossing of nerve fibers.
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