PERIPHERAL NERVE & SPINAL NERVE confusion?!?!

[KiTmAn]

I understand that peripheral nerves are just nerves outside of brain and spinal cord...

so as the spinal nerve emerges out of the intervertebral foramen ..it leads to formation of dorsal and ventral ramii...and ventral ramii gives rise plexuses such as cervical, brachial, lumbar, and sacral..

Is peripheral nerve a name given to spinal nerves after they emerge out of the spinal cord (aka after intervertebral foramina) or are they totally different set of nerves??

Can someone please clear this jumble up!!

Thanks a lot

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[morphology]

I understand that peripheral nerves are just nerves outside of brain and spinal cord...

so as the spinal nerve emerges out of the intervertebral foramen ..it leads to formation of dorsal and ventral ramii...and ventral ramii gives rise plexuses such as cervical, brachial, lumbar, and sacral..

Is peripheral nerve a name given to spinal nerves after they emerge out of the spinal cord (aka after intervertebral foramina) or are they totally different set of nerves??

Can someone please clear this jumble up!!

Thanks a lot

they are part of the peripheral nerve. u can check on http://en.wikipedia.org/wiki/Spinal_nerve

 

[metrogyl80]

peripheral nerves arise from spinalcord and go to arms hands legs and feet.they are spinal nerves which supply periphery of the body.

I understand that peripheral nerves are just nerves outside of brain and spinal cord...

so as the spinal nerve emerges out of the intervertebral foramen ..it leads to formation of dorsal and ventral ramii...and ventral ramii gives rise plexuses such as cervical, brachial, lumbar, and sacral..

Is peripheral nerve a name given to spinal nerves after they emerge out of the spinal cord (aka after intervertebral foramina) or are they totally different set of nerves??

Can someone please clear this jumble up!!

Thanks a lot

 

[KiTmAn]

ok that makes a bit more sense...thanks a lot...and just to clarify somethingelse...are cranial nerves considered part of peripheral nervous system??

 

[metrogyl80]

Some differences between the peripheral nervous system (PNS) and the central nervous system (CNS):

1. In the CNS, collections of neurons are called nuclei. In the PNS, collections of neurons are called ganglia.
2. In the CNS, collections of axons are called tracts. In the PNS, collections of axons are called nerves.

In the peripheral nervous system, neurons can be functionally divided in three ways:

1. Sensory (afferent) - carry information INTO the central nervous system from sense organs or motor (efferent) - carry information away from the central nervous system (for muscle control).
2. Cranial - connects the brain with the periphery or spinal - connects the spinal cord with the periphery.
3. Somatic - connects the skin or muscle with the central nervous system or visceral - connects the internal organs with the central nervous system.

ok that makes a bit more sense...thanks a lot...and just to clarify somethingelse...are cranial nerves considered part of peripheral nervous system??

 

[KiTmAn]

oh ok..thank you so much!!