Comparison between tract and nerve

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  Comparison between tract and nerve Nerve Nerve contain bundle of axons (nerve fibers) in the peripheral nervous system (PNS) that transmits signals between the central nervous system (CNS) and other parts of the body. It is the most important part of peripheral nervous system Location: Peripheral nervous system. Structure: Made of axons, connective tissue layers (endoneurium: axon is surrounded by it , perineurium: bundle of axons are surrounded by it, epineurium: whole nerve trunk is surrounded by it), and blood vessels. It gets myelination by Schwann cell   Function: Carries sensory signals to the CNS (afferent) from peripheral part of body or motor signals carry from from the CNS (efferent) to target organs like skeletal muscle, cardiac muscle, smooth muscle or glands Example: Sciatic nerve, median nerve, except optic nerve (though optic nerve is technically part of CNS in develop...
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Difference between crinial and motor root of accessory nerve

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Accessory nerve

 

Functions

Nucleus

Name of the opening

 through which nerve

exit  the cranium

Cranial root

It supplies all muscles of soft palate ( except tensor veli  palatine) and all muscles of  the pharynx except stylopharyngeus

 

Spinal accessory nucleus

Jugular foramen

Spinal root

This part supplies the sternocleidomastiod

and trapezius muscles

 

Foramen magnum

 

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