What does the intercostal nerve control?
Unlike the nerves from the autonomic nervous system that innervate the visceral pleura of the thoracic cavity, the intercostal nerves arise from the somatic nervous system. This enables them to control the contraction of muscles, as well as provide specific sensory information regarding the skin and parietal pleura.
What do the thoracic nerves innervate?
Thoracic Spinal Nerves. The thoracic spine has 12 nerve roots (T1 to T12) on each side of the spine that branch from the spinal cord and control motor and sensory signals mostly for the upper back, chest, and abdomen.
What happens if the intercostal nerves are damaged?
a sharp, stabbing, burning, or aching pain in the ribs, chest, or abdomen. tingling and numbness in the ribs, chest, or abdomen. reduced motor function around the affected area (in severe cases)
What does phrenic nerve innervate?
The phrenic nerves provide motor innervation to the diaphragm and work in conjunction with secondary respiratory muscles (trapezius, pectoralis major, pectoralis minor, sternocleidomastoid, and intercostals) to allow respiration.
What are your intercostal muscles?
Your intercostal muscles are the muscles between your ribs. They allow your ribcage to expand and contract so you can breathe. But if they stretch too far or tear, intercostal muscle strain is the end result.
What muscles are innervated by the long thoracic nerve?
The long thoracic nerve is the motor nerve to the serratus anterior muscle, which functions to pull the scapula forward around the thorax, allowing for anteversion of the arm, and to lift the ribs, assisting in respiration.
What muscles are innervated by T12?
Subcostal nerve (T12). The subcostal nerve provides sensory innervation to the region under the umbilicus and also provides motor innervation to the pyramidalis and quadratus lumborum muscles.
Where are your intercostal muscles?
What causes intercostal muscle spasms?
Common causes include: a direct blow to the rib cage, such as from a fall or car accident. an impact blow from contact sports, such as hockey or football. twisting the torso beyond its normal range of motion.
What is phrenic muscle?
The phrenic nerve provides the primary motor supply to the diaphragm, the major respiratory muscle. It passes motor information to the diaphragm and receives sensory information from it. There are two phrenic nerves, a left and a right one. Image 1: The Phrenic nerve, showing course to diaphragm.