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30 paź 2023 · There are 31 bilateral pairs of spinal nerves, named from the vertebra they correspond to. For the most part, the spinal nerves exit the vertebral canal through the intervertebral foramen below their corresponding vertebra.
- Grey Matter
Like the rest of the central nervous system, the spinal cord...
- Coccygeal Nerve
Branches and innervation. The coccygeal nerve terminates in...
- Stretch Reflex
The stretch reflex is the contraction of a muscle that...
- Ganglia
A ganglion (pl. ganglia) is a mass of nerve cell bodies...
- Withdrawal Reflex
The withdrawal reflex is a spinal reflex intended to protect...
- Myotomes
Myotome: A group of muscles innervated by a single spinal...
- Grey Matter
8 kwi 2023 · The relevant anatomy of the innervation of the musculature of the back by the spinal nerves is centered around the lumbar spinal nerves, peripheral nerves of the lumbar plexus, spinal cord, and lumbar vertebral column. In general, the spinal cord consists of gray and white matter.
14 sie 2023 · Cutaneous innervation of the periphery maps into dermatomes, which are areas of skin supplied by nerves arising from a single spinal root. Understanding the topographical distribution is central to the diagnosis of a wide range of pathology.
21 paź 2024 · Spinal nerves originate from the spinal cord, carry both sensory and motor information to both somatic and visceral organs. Their connections to the skin to form a map of dermatomes.
Spinal nerves are all mixed nerves with both sensory and motor fibers. Spinal nerves emerge from the spinal cord and reorganize through plexuses, which then give rise to systemic nerves. Thoracic spinal nerves are not part of any plexus, but give rise to the intercostal nerves directly.
30 paź 2023 · The lumbar plexus gives rise to several branches which supply various muscles and regions of the posterior abdominal wall and lower limb. These branches include the iliohypogastric, ilioinguinal, genitofemoral, lateral femoral cutaneous, femoral and obturator nerves.
29 cze 2021 · The spinal nerves are named according to where in the spine they emerge i.e. they are named in accordance with the level of the spine they exit from. E.g. the C2 nerve exits between the C1-2 vertebrae, the L4 nerve exits between the L4-5 vertebrae.
