New PDF release: The Spinal Cord (Gray Matter)

By Carl Y. Saab

ISBN-10: 0791085112

ISBN-13: 9780791085110

This isn't a textbook, which one could think given the writer. it really is of the type you'll anticipate finding within the ready room besides Winnie the Pooh. on condition that, it kind of feels simply superb. it's a first advent to the topic approximately 3/8 of an inch thick, acceptable for grammar university libraries. I ordered it pondering it used to be the newest factor at the backbone, which Saab may possibly definitely produce. the outline should still learn 'juvenile literature'.

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The Spinal Cord (Gray Matter) by Carl Y. Saab PDF

This isn't a textbook, which one could imagine given the writer. it's of the kind you'll anticipate finding within the ready room in addition to Winnie the Pooh. on condition that, it kind of feels simply wonderful. it's a first advent to the topic approximately 3/8 of an inch thick, applicable for grammar tuition libraries.

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Extra resources for The Spinal Cord (Gray Matter)

Example text

As discussed before, gray matter contains mainly the cell bodies of neurons, whereas axons make up the white matter. Depending on the stain used, dyes traditionally used to visualize the white matter actually stain the myelin surrounding axons. This myelin provides protection and insulation to neurons, thus contributing to a higher speed of conduction compared with nonmyelinated neurons. When axons are grouped in parallel in the peripheral nervous system, they can be referred to as a nerve. When axons are 28 grouped in parallel in the central nervous system (CNS) (mainly in the spinal cord), they are referred to as a tract or a pathway that forms a highway of communication, sometimes serving specific functions such as pain, touch, or execution of willed movement.

COORDINATED PATTERNS OF MOVEMENTS One familiar example of a spinal reflex discussed previously is the rapid withdrawal of a limb in response to a painful stimulus. On touching the surface of a hot stove with the hand, the same hand is rapidly withdrawn from the stove. 1 Flexion contracts the bicep muscles so that the forearm lifts. Extension contracts the tricep muscles, which straightens the forearm. information about the event, and therefore one is not aware of this act until a few hundredths of a second after it happens.

For example, a soldier in battle may suffer a serious wound yet not realize it unless bleeding is obvious. This may be due in part to the secretion of molecules in the blood during What Is a Spinal Cord and Why Do We Need One? states of extreme stress. Conversely, after admission to the hospital and away from the battleground, the same soldier may shout in pain from the prick of a needle. This anecdote illustrates the capacity of the brain to “judge” the relevance of sensory events before translating neuronal input into perceptions.

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The Spinal Cord (Gray Matter) by Carl Y. Saab


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