Human Anatomy (9th Edition)
Human Anatomy (9th Edition)
9th Edition
ISBN: 9780134320762
Author: Frederic H. Martini, Robert B. Tallitsch, Judi L. Nath
Publisher: PEARSON
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Chapter 15, Problem 1RFT

Match each numbered item with the most closely related lettered item.

decussation.........................................

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Summary Introduction

To review:

Match the term decussation with the most closely related description given below:

Second order

Pain, temperature, crude touch, pressure

Voluntary control skeletal muscle

Subconscious control of distal limb musculature

Afferent

Information about “what,” “where,” and “when”

Unconscious proprioception

Crossover

Position change noise-related

Introduction:

In the ascending tracts of the spinal cord, the first-order axon and the second-order axon goes across to the opposite area of the brain-stem or the spinal cord, thereby forming a crossover. This is known as decussation.

Explanation of Solution

The first and second-order axon is arranged as a cross when it ascends across the spinal cord. This crossing over of the axons is known as decussation. This crossing over leads to the transmission of sensory messages from the left side of the body to the right side of the brain and vice-versa.

Conclusion

Therefore, it can be concluded that the term decussation can be correctly matched with option (h) crossover.

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