Explain the spinal nerves, Science

Assignment Help:

Explain the Spinal Nerves

As mentioned earlier, there are 31 pairs of spinal nerves that leave the vertebral canal by passing through the intervertebral foramina formed by adjacent vertebrae. All of the spinal nerves are "mixed", that is, they contain both sensory and motor neurons. A representation of these spinal nerves supplying to the specific organs, you may recall has already been presented, in Figure. Look up Figure now. You will realize that these spinal nerves are named and grouped according to vertebrae to which they are associated.

8 - Cervical, 12 - Thoracic, 5 - Lumbal, 5 - Sacral, 1 - Coccygeal

1146_Explain the Spinal Nerves.jpg

Although there are only 7 cervical vertebrae, there are eight nerves because the first pair leaves the vertebral canal between the occipital bone and the atlas and eighth pair leaves below last cervical vertebrae. Lumbar, sacral, coccygeal nerves leave spinal cord near its termination at the level of first lumbar vertebrae. They extend down inside the vertebral canal in the subarachnoid space, which forms a sheaf of nerves, which resembles a horse's tail - the cauda equina. They leave the vertebral canal at the appropriate lumbar, sacral or coccygeal level. There are 12 pairs of thoracic nerve. Eleven of them are situated between the ribs, and are therefore termed intercostal; the twelfth lies below the last rib. They pass in-between the ribs supplying the intercostal muscles and overlying skin. The 12th pairs are the sub costal nerves. The 7th to 12th thoracic nerves also supply muscles of the skin of posterior and anterior abdominal walls. The spinal nerve arises from both sides of spinal cord and emerges through intervertebral foramina. Each nerve is formed by the union of a motor and sensory nerve root and thus forms a mixed nerve, as mentioned above. Each spinal nerve has contributions from sympathetic part of autonomic nervous system in the form of a preganglionic fibre.


Related Discussions:- Explain the spinal nerves

Week6 assign, For this Assignment, you will identify a social issue or prob...

For this Assignment, you will identify a social issue or problem that is important to you and reflect on how it might be remediated through the application of learning principles t

Remove the wastes from the body - function of kidney, Remove the wastes fro...

Remove the wastes from the body - Function of Kidney Remove the wastes from the body. Many metabolic waste products such as urea, uric acid, ammonia and creatinine need to be f

Explain organs of the respiratory system, Explain Organs of the Respiratory...

Explain Organs of the Respiratory System The respiratory system consists of various organs. They form a clear pathway for the air to enter and leave the lungs. The body needs a

Explain the insulin, Explain the Insulin Insulin is a hormone synthesiz...

Explain the Insulin Insulin is a hormone synthesized from the precursor called preproinsulin. Preproinsulin has four peptides. Insulin circulates in the blood in a free state.

#title food technology, in honey if fieshe''s test is negative then is it r...

in honey if fieshe''s test is negative then is it required to perform the hmf test. kindly let me know the relation between te two

Explain tidal volume and inspiratory reserve volume, Explain Tidal Volume a...

Explain Tidal Volume and Inspiratory Reserve Volume Tidal Volume (TV):   It is the volume of air that is taken in or given out during quiet breathing. The volume 1s about 500

What is the earths core made of, What is the earths core made of? Ans) ...

What is the earths core made of? Ans) The outer earth core is liquid and the inner is solid. Both parts are of alloy of two metals - iron and nickel, permitting the rise of the

Explain the igneous rocks form, Explain the Igneous rocks form? Igneous...

Explain the Igneous rocks form? Igneous rocks form from the crystallization of magma. There are two main kinds of igneous rocks: intrusive and extrusive Molten rock within t

Cloud made of comets, A Cloud Made of Comets The cold outer areas bey...

A Cloud Made of Comets The cold outer areas beyond Pluto are the regions of  comets, those visitors that dash, around the Sun, seldom to be seen again. Comets are of grei3t

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd