Videos
Match each numbered item with the most closely related lettered item.
decussation.........................................
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.
Therefore, it can be concluded that the term decussation can be correctly matched with option (h) crossover.
Want to see more full solutions like this?
Chapter 15 Solutions
Human Anatomy - With Access
- Where does the bunde of ganglion axons that forms the optic nerve exit the eye?arrow_forwardWhat is the role of afferent fibers?arrow_forwardHow would the otolith organs of an astronaut respond to zero gravity? Would the astronaut still have a subjective impression of motion? Would the semicircular canals detect angular acceleration equally well at zero gravity?arrow_forward
- What would cause the greatest loss of visual function—trauma to cranial nerve III, IV, or VI? Why?arrow_forwardIf a woman with a severed corpus callosum viewed a photograph of a familiar face, first in her left field of vision and then in her right field, why would she find it difficult to put a name to the face?arrow_forwardWhat is a vestibular nerve?arrow_forward
- Can a split-brain person name an object after feeling it with the right hand? With the left hand? Explain.arrow_forwardSuppose a person had an accident that severed a small nerve required to move some of the fingers of the right hand. Would you also expect an effect on sensation from those fingers?arrow_forwardAs a result of pressure on her spinal cord, Jill cannot feel touch or pressure on her legs. What sensory path- way is being compressed?arrow_forward
Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning