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What is a plexus?
A plexus (from the Latin plectere,meaning "braid") is an interwoven network of spinal nerves. There are four major plexuses on each side of the body: 1) the cervical plexus innervates the muscles of the neck, the skin of the neck, the back of the head, and the diaphragm muscle; 2) the brachialplexus innervates the shoulder and upper limb; 3) the lumbar plexus innervates the muscles and skin of the abdominal wall; and 4) the sacral plexus innervates the buttocks and lower limbs. The nerves then divide into smaller branches.
The dorsal rami of the spinal nerves serves?
Skin and deep muscles of the back.
What is the medical definition of dorsal rami?
The dorsal rami are small branches of spinal nerves that emerge from the spinal cord and supply the skin and muscles of the back. They are responsible for providing sensory and motor innervation to the back of the body.
What muscles are directly involved with the lumbar spinal injury?
Lumbar Nerves "L" (nerves in the lower back) supply the legs, the bladder, bowel and sexual organs.
How do muscles get signals from the brain?
Brain sends signal through spinal cord to nerves. Nerves contract which muscle to move and sends a message back to the brain. BOOM! Movement.
What nerve makes you walk?
The primary nerve responsible for walking is the sciatic nerve, which originates from the lower back and innervates the muscles of the legs and feet. It controls the movement of the muscles involved in walking, including those in the thighs, calves, and feet. Additionally, the spinal cord and various other nerves play crucial roles in coordinating and facilitating walking through motor control and balance.
A group of many nerves that extend down the back is called?
The group of nerves that extend down the back is called the spinal nerves. These nerves originate from the spinal cord and control sensation and movement in different parts of the body.
Does dorsal ramus form a plexus?
No, the dorsal ramus does not form a plexus. It supplies nerves to the skin and muscles of the back in a segmental pattern without intermingling as in a plexus, which is a network of nerves where fibers from different spinal nerves combine and then redistribute.
What can be the origin of back pain?
It may originate from the bones and ligaments forming the spine, the muscles and tendons supporting the back, the nerves that exit the spinal column, or even the internal organs.
What does the spinal cord do to help the rest of the nervous system?
The spinal cord is like the main road through a city, it provides a pathway down the body for the other nerves to branch off and reach muscles, tissues, organs etc. and for these nerves to join back up and return to the brain.
What composed the central nervous system?
The central nervous system is composed of the brain, brain stem, and spinal cord. Efferent nerves travel from the brain, through the spinal cord, to the rest of the body. Afferent nerves travel from the body, back up the spinal cord, and back to the brain.
The dorsal rami of the spinal nerves serve what?
The dorsal rami serve the skin and musculature of the posterior body trunk.
