Spinal cord and spinal nerves

Spinal cord(basic) Function - conduction (ascending, descending tracts) - locomotion - reflex integration (spinal reflex center) Structure - cervical enlargement(C3~Th2) - lumbar enlargement(Th9~Th12) - medullary cone - cauda equina - terminal filum

Spinal cord(anatomy) * meninges - dura mater - arachnoid mater - pia mater

Spinal cord(anatomy)

Spinal cord(anatomy) * cross-sectional anatomy : gray matter + white matter

Spinal tracts * ascending tracts + descending tracts

Descending tracts(CNS) * lateral corticospinal tract * anterior corticospinal tract

Ascending tracts(CNS)

Spinal nerves(anatomy)

Spinal nerves(anatomy)-ganglia * classification of nerve fibers

Spinal nerves(anatomy)-ganglia

Spinal nerves * spinal nerves(31 pairs) - cervical nerves(8) - thoracic nerves(12) - lumbar nerves(5) - sacral nerves(5) - coccygeal nerves(1) * plexuses - cervical plexus - brachial plexus - lumbar plexus - sacral plexus - coccygeal plexus

Spinal nerves(structure) * branches of a spinal nerve in relation to the spinal cord and vertebra (cross section)

Spinal nerves(structure) * rami of the spinal nerves

Nerve plexuses Cervical plexus Cervical plexus - C1~C4 & C5 일부 (phrenic nerve) Cervical plexus

Nerve plexuses Brachial plexus(C5~Th1) - root - trunk - division - cord - peripheral nerve Peripheral nerve - axillary nerve - radial nerve - musculocutaneous nerve - ulnar nerve - median nerve

Nerve plexuses Lumbar plexus (L1~L4, 일부 Th12) Peripheral nerve - femoral nerve - obturator nerve - iliohypogastric nerve (배빗근, 배가로근) - ilioinguinal nerve

Nerve plexuses Sacral plexus (L4~L5, S1~S4)) Peripheral nerve - sciatic nerve (tibial + common fibular) common fibular nerve (=deep + superficial) Lumbar + Sacral = lumbosacral plexus

Dermatome

Reflex arc Components of the reflex arc - receptor - sensory neuron - center - motor neuron - effector 반사활은 신체 항상성을 유지하기 위한 자율적이고 무의식적이며 보호적인 반응을 포함