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Comparison between tract and nerve

  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...

Difference between superior and inferior gluteal nerve

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Difference between superior and inferior gluteal nerve  Superior gluteal nerve Inferior gluteal nerve It arises from dorsal branches of the ventral rami of the 4 th and 5 th lumbar and 1 st sacral spinal nerves It arises from dorsal branches of the ventral rami of the   5 th lumbar , 1 st and 2 nd sacral spinal nerves It enters in the gluteal region above the piriformis muscle It enters in the gluteal region below the piriformis muscle It divides into two branches : for gluteus medius & gluteus minimus and tensor fasciae latae It supply only gluteus maximus muscle It is related with superior gluteal vessels It is related with sciatic nerve   but the relationship between the inferior gluteal nerve and artery was found to be unpredictable.   No consistent relationship between the inferior gluteal artery and the inferior gluteal nerve was observed in current studies ...