enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Lumbar nerves - Wikipedia

    en.wikipedia.org/wiki/Lumbar_nerves

    The second lumbar spinal nerve (L2) [2] originates from the spinal column from below the lumbar vertebra 2 (L2). L2 supplies many muscles, either directly or through nerves originating from L2. They may be innervated with L2 as single origin, or be innervated partly by L2 and partly by other spinal nerves. The muscles are: quadratus lumborum ...

  3. Lumbar plexus - Wikipedia

    en.wikipedia.org/wiki/Lumbar_plexus

    The lumbar plexus is a web of nerves (a nerve plexus) in the lumbar region of the body which forms part of the larger lumbosacral plexus. It is formed by the divisions of the first four lumbar nerves (L1-L4) and from contributions of the subcostal nerve (T12), which is the last thoracic nerve .

  4. Nerve root - Wikipedia

    en.wikipedia.org/wiki/Nerve_root

    A nerve root (Latin: radix nervi) is the initial segment of a nerve leaving the central nervous system.Nerve roots can be classified as: Cranial nerve roots: the initial or proximal segment of one of the twelve pairs of cranial nerves leaving the central nervous system from the brain stem or the highest levels of the spinal cord.

  5. Sympathetic trunk - Wikipedia

    en.wikipedia.org/wiki/Sympathetic_trunk

    Download as PDF; Printable version; In other projects ... The formation of the spinal nerve from the dorsal and ventral roots. ... Diagram of efferent sympathetic ...

  6. Spinal nerve - Wikipedia

    en.wikipedia.org/wiki/Spinal_nerve

    Spinal nerve Typical spinal nerve location. Each spinal nerve is a mixed nerve, formed from the combination of nerve root fibers from its dorsal and ventral roots. The dorsal root is the afferent sensory root and carries sensory information to the brain. The ventral root is the efferent motor root and carries motor information from the brain.

  7. Outline of the human nervous system - Wikipedia

    en.wikipedia.org/wiki/Outline_of_the_human...

    An action potential (or nerve impulse) is a transient alteration of the transmembrane voltage (or membrane potential) across the membrane in an excitable cell generated by the activity of voltage-gated ion channels embedded in the membrane. The best known action potentials are pulse-like waves that travel along the axons of neurons.

  8. White ramus communicans - Wikipedia

    en.wikipedia.org/wiki/White_ramus_communicans

    The white ramus communicans (pl.: rami communicantes) from Latin ramus (branch) and communicans (communicating) is the preganglionic sympathetic outflow nerve tract from the spinal cord. Each of the thoracic, and the first and second lumbar nerves contribute a white ramus communicans to the adjoining sympathetic ganglion , unlike the gray rami ...

  9. Lumbar enlargement - Wikipedia

    en.wikipedia.org/wiki/Lumbar_enlargement

    The lumbar enlargement (or lumbosacral enlargement) is a widened area of the spinal cord that gives attachment to the nerves which supply the lower limbs. It commences about the level of T11 and ends at L2, and reaches its maximum circumference, of about 33 mm. Inferior to the lumbar enlargement is the conus medullaris .