motor and sensory needs of the muscles and skin of the body's limbs
brachial :)
Plexuses, referring to the nerve plexuses in both upper and lower limb refer to the collection and grouping of nerves responsible for both sensory and motor input/output in a particular area. For example, the brachial plexus is the collection and arrangement of nerves that arises from the spinal cord area around C5-T1/3 and supplies the innervation for the upper limbs.
Plexuses primarily supply the limbs and certain body regions, with major examples being the brachial plexus for the upper limb, the lumbar plexus for the lower limb, and the sacral plexus also serving the lower limb and pelvic area. In contrast, intercostal nerves supply the thoracic wall, including the intercostal muscles, skin over the thorax, and parts of the abdominal wall. These nerves arise from the thoracic spinal nerves and do not form plexuses.
choroid plexuses
Plexus nerves primarily supply the limbs and certain regions of the body. The major plexuses include the brachial plexus, which innervates the upper limb; the lumbar plexus, which supplies the lower back and legs; and the sacral plexus, which serves the pelvic area and lower limbs. Additionally, the cervical plexus innervates parts of the neck and diaphragm.
Except for T2-T12, all ventral rami branch and join one another lateral to the vertebral column, forming complicated interlacing nerve networks called nerve plexuses. Nerve plexuses occur in the cervical, brachial, lumbar, and sacral regions and primarily serve the limbs (MarieB, 2010 8th ed. pp. 502)
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The ventral rami of spinal nerves C1-T1 form the cervical plexus, serving the head, neck, and diaphragm. T12-S4 form the lumbosacral plexus, serving the lower limbs and pelvic region. These plexuses distribute nerve fibers to various muscles and skin areas, allowing for coordinated movement and sensation in these regions.
The intrinsic nerve plexuses, also known as the enteric nervous system, are primarily located within the walls of the gastrointestinal tract. They are found in two main plexuses: the myenteric plexus, which lies between the longitudinal and circular muscle layers, and the submucosal plexus, located in the submucosa. These plexuses play a crucial role in regulating digestive processes, including motility and secretion.
brachial plexuses injury,
The major plexuses of the spinal cord are: Cervical Plexus (C1–C4) – neck & diaphragm Brachial Plexus (C5–T1) – upper limbs Lumbar Plexus (L1–L4) – abdomen & thigh Sacral Plexus (L4–S4) – leg & foot Coccygeal Plexus (S4–Co1) – coccyx