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...
Post a Comment

Difference between superior and inferior gluteal nerve

-

Difference between superior and inferior gluteal nerve 



Superior gluteal nerve
Inferior gluteal nerve
It arises from dorsal branches of the ventral rami of the 4th and 5th lumbar and 1st sacral spinal nerves
It arises from dorsal branches of the ventral rami of the  5th lumbar , 1st and 2nd 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
Weakness or paralysis of these muscles caused by a damaged superior gluteal nerve can result in a weak abduction in the affected hip joint. This gait disturbance is known as Trendelenburg gait .
Injury to this nerve is rare but often occurs as a complication of posterior approach to the hip during hip replacement. When damaged, one would develop gluteus maximus lurch, which is a gait abnormality which causes the individual to 'lurch' backwards to compensate lack in hip extension.


Popular posts from this blog

Difference between relations of right and left suprarenal gland

-
Difference between relations of right and left suprarenal gland Topics Right suprarenal gland Left suprarenal gland Anterior surface Medial inferior vena cava Lateral right lobe of liver including bare area Superior stomach Inferior splenic artery & pancreas Posterior surface Inferior kidney Superior right crus of diaphragm Medial crus of left diaphragm Lateral kidney Medial border Right celiac ganglion Right inferior phrenic artery   Left   celiac ganglion Left   inferior phrenic artery Left gastric vessels Hilum Near the upper end Near the lower end Peritoneal relations Not related with peritoneal except a tiny area below Related to peritoneum of omental bursa which separates it from stomach
Read more

Fibroblast vs fibrocyte

-
  Fibroblast  is permanent  connective tissue cell responsible for the production of the extracellular matrix (ECM) and collagen fibers which  are essential for tissue structure and repair and play a major role in wound healing. unique features of Fibroblasts : Shape and Structure :  Spindle-shaped (elongated). it contain l arge nucleus that is oval or elliptical . and c ytoplasm is abundant and basophilic (stains blue), reflecting active protein synthesis. and it has  prominent nucleolus , indicating high activity in protein synthesis. Function : it produces the structural components of the extracellular matrix like collagen , elastin , glycosaminoglycans , and proteoglycans .  In response to injury, fibroblasts proliferate and migrate to the site of injury, secreting growth factors and ECM components to promote tissue repair and fibrosis. Major producer of collagen fibers which provide tensile strength to tissues. Elastin Production : ...
Read more