spinal: - first cervical - nerve roots - anterior root - posterior root - spinal ganglia - cauda equina - spinal - gray ramus communicans - white ramus communicans Nerves (yellow) Nerves redirects here. ... The peripheral nervous system or PNS, is part of the nervous system, and consists of the nerves and neurons that reside or extend outside the central nervous system--to serve the limbs and organs, for example. ... The term spinal nerve generally refers to the mixed spinal nerve, which is formed from the dorsal and ventral roots that come out of the spinal cord. ... spinal ganglia ... The cauda equina is a structure within the lower end of the spinal column, that consists of nerve roots and rootlets from above. ... The term spinal nerve generally refers to the mixed spinal nerve, which is formed from the dorsal and ventral roots that come out of the spinal cord. ...

posterior divisions: cervical - greater occipital - thoracic - lumbar - sacral - coccygeal The Cervical Nerves—The posterior division of the first cervical or suboccipital nerve is larger than the anterior division, and emerges above the posterior arch of the atlas and beneath the vertebral artery. ... The greater occipital nerve is a spinal nerve arising between the first and second cervical vertebrae, along with the lesser occipital nerve. ... The formation of the spinal nerve from the dorsal and ventral roots Grays Fig. ... The Sacral Nerves—The posterior divisions of the sacral nerves (rami posteriores) are small, and diminish in size from above downward; they emerge, except the last, through the posterior sacral foramina. ...

anterior divisions: cervical - smaller occipital - great auricular - supraclavicular - phrenic - The cervical plexus is a plexus of the ventral roots of the first four cervical spinal nerves which are located from C1 to C4 cervical segment near the neck. ... The phrenic nerve arises from the third, fourth, and fifth cervical spinal nerves (C3-C5). ...

brachial: lateral cord - medial cord - posterior cord - dorsal scapular - suprascapular - nerve to the subclavius - long thoracic - anterior thoracic - lateral anterior thoracic - medial anterior thoracic - upper subscapular - lower subscapular - thoracodorsal - axillary - superior lateral cutaneous nerve of arm - musculocutaneous - lateral cutaneous nerve of forearm - medial cutaneous nerve of forearm - medial cutaneous cutaneous nerve of arm The brachial plexus is an arrangement of nerve fibres (a plexus) running from the spine (vertebrae C5-T1), through the neck, the axilla (armpit region), and into the arm. ... The Lateral cord is a division of the brachial plexus. ... The Medial cord is a division of the brachial plexus. ... The Posterior cord is a division of the brachial plexus. ... The dorsal scapular nerve arises from the brachial plexus, specifically from spinal nerves C4 and C5. ... The Nervus suprascapularis (Suprascapular nerve) is a nerve of the plexus brachialis. ... Grays Fig. ... The upper subscapular (short subscapular) enters the upper part of the Subscapularis, and is frequently represented by two branches. ... The lower subscapular supplies the lower part of the Subscapularis, and ends in the Teres major; the latter muscle is sometimes supplied by a separate branch. ... The Posterior cord is a division of the brachial plexus. ... The axillary nerve is a nerve of the human body, that comes off the posterior cord of the brachial plexus at the level of the axilla (armpit) and carriers nerve fibers from C5 and C6. ... The major end branch of the lateral cord, courses inferiorly within the anterior arm, supplying motor fibers to the arm muscles that flex the forearm (the biceps brachii and brachialis). ...

median: anterior interosseous - palmar - proper palmar digital - common palmar digital Diagram from Grays anatomy, depicting the peripheral nerves of the upper extremity, amongst others the median nerve The median nerve is a nerve that runs down the arm and forearm. ...

ulnar: palmar branch - dorsal branch Grays Fig. ...

radial: muscular - posterior cutaneous of arm - posterior cutaneous of forearm - superficial branch - deep branch The radial nerve is a nerve in the human body, that supplies the arm, the forearm and the hand. ...

thoracic nerves: intercostal - intercostobrachial - subcostal The thoracic spinal nerves T3 through T12. ... The anterior division of the twelfth thoracic nerve (subcostal nerve) is larger than the others; it runs along the lower border of the twelfth rib, often gives a communicating branch to the first lumbar nerve, and passes under the lateral lumbocostal arch. ...

lumbosacral: lumbar - iliohypogastric - ilioinguinal - genitofemoral - lumboinguinal - lateral femoral cutaneous - patellar - obturator - accessory obturator - femoral Grays Fig. ... The Iliohypogastric Nerve arises from the first lumbar nerve. ... The Ilioinguinal Nerve, smaller than the Iliohypogastric nerve, arises with it from the first lumbar nerve. ... In human anatomy, the genitofemoral nerve originates from the upper part of the lumbar plexus of spinal nerves. ... The Lateral Femoral Cutaneous Nerve (external cutaneous nerve) arises from the dorsal divisions of the second and third lumbar nerves. ... The Obturator Nerve arises from the ventral divisions of the second, third, and fourth lumbar nerves; the branch from the third is the largest, while that from the second is often very small. ... The Femoral Nerve supplies innervation the anterior portion of the leg. ...

sacral and coccygeal nerves: sacral - nerve to the quadratus femoris and gemellus inferior - nerve to the obturator internus and gemellus superior - nerve to the piriformis - superior gluteal - inferior gluteal - posterior femoral cutaneous - sciatic - tibial - sural - medial plantar - lateral plantar - common fibular - deep fibular - superficial fibular - Pudendal plexus perforating cutaneous - pudendal - dorsal nerve of the penis - inferior rectal - perineal - anococcygeal In human anatomy, the Sacral plexus refers to the nerve plexus emerging from the sacral vertebrae (S1-S4), and which provides nerves for the pelvis and lower limbs. ... The Superior Gluteal Nerve () arises from the dorsal divisions of the fourth and fifth lumbar and first sacral nerves: it leaves the pelvis through the greater sciatic foramen above the Piriformis, accompanied by the superior gluteal vessels, and divides into a superior and an inferior branch. ... The Posterior Femoral Cutaneous Nerve (small sciatic nerve) is distributed to the skin of the perineum and posterior surface of the thigh and leg. ... This article or section may be confusing or unclear for some readers, and should be edited to rectify this. ... The Tibial Nerve The tibial nerve passes through the popliteal fossa to pass below the arch of soleus. ... The sural nerve (short saphenous nerve), formed by the junction of the medial sural cutaneous with the peroneal anastomotic branch, passes downward near the lateral margin of the tendo calcaneus, lying close to the small saphenous vein, to the interval between the lateral malleolus and the calcaneus. ... The pudendal plexus is not sharply marked off from the sacral plexus, and as a consequence some of the branches which spring from it may arise in conjunction with those of the sacral plexus. ... The Perforating Cutaneous Nerve usually arises from the posterior surface of the second and third sacral nerves. ... The pudendal nerve is responsible for orgasm, urination, and defecation in both sexes. ... Anococcygeal Nerves: The fifth sacral nerve receives a communicating filament from the fourth, and unites with the coccygeal nerve to form the coccygeal plexus. ...

sympathetic nervous system: preganglionic fibers - sympathetic trunks - ganglion impar - rami communicantes - collateral ganglia - cardiac - celiac - hypogastric Grays FIG. 838– The right sympathetic chain and its connections with the thoracic, abdominal, and pelvic plexuses. ... The sympathetic trunks (sympathetic chain, paravertebral ganglia, gangliated cord) extend from the base of the skull to the coccyx. ... Collateral Ganglia lie between the sympathetic chain and the organ of supply. ... The solar plexus, also known as the celiac plexus or plexus cœliacus, is an autonomous cluster of nerve cells (see Plexus) in the human body behind the stomach and below the diaphragm near the celiac artery in the abdominal cavity. ...

cephalic portion: internal carotid - cavernous cervical portion: superior cervical thoracic portion: splanchnic The superior cervical ganglion, the largest of the cervical ganglia, is placed opposite the second and third cervical vertebræ. It is of a reddish-gray color, and usually fusiform in shape; sometimes broad and flattened, and occasionally constricted at intervals; it is believed to be formed by the coalescence of... The splanchnic nerves are part of the autonomic nervous system. ...

great plexuses: celiac plexus - celiac ganglia - aorticorenal - renal - spermatic - superior mesenteric - aortic plexus - inferior mesenteric The solar plexus, also known as the celiac plexus or plexus cœliacus, is an autonomous cluster of nerve cells (see Plexus) in the human body behind the stomach and below the diaphragm near the celiac artery in the abdominal cavity. ...