What nerve Innervates the thorax?
The phrenic is the motor and sensory nerve of the diaphragm. The vagus provides the parasympathetic supply for all the organs of the thorax and abdomen. The courses of these two nerves are similar: they both start in the neck, run downward in the mediastinum, and pass through the diaphragm.
What is the thorax composed of?
In tetrapods. In mammals, the thorax is the region of the body formed by the sternum, the thoracic vertebrae, and the ribs. It extends from the neck to the diaphragm, and does not include the upper limbs. The heart and the lungs reside in the thoracic cavity, as well as many blood vessels.
What is the thoracic wall innervated by?
intercostal nerves
The intercostal nerves give anterior and lateral cutaneous branches to innervate the thorax and abdominal wall, muscular branches to supply the muscles of the thoracic wall, and they give rami communicantes or communicating branches that connect the intercostal nerves to a sympathetic trunk on the same side.
What nerve Innervates the thoracic diaphragm?
The phrenic nerve originates from the anterior rami of the C3 through C5 nerve roots and consists of motor, sensory, and sympathetic nerve fibers. It provides complete motor innervation to the diaphragm and sensation to the central tendon aspect of the diaphragm.
What plexus Innervates the posterior leg?
Sciatic Nerve Innervates all the muscles in the posterior compartment of the leg and sole of the foot. Common fibular portion – Short head of biceps femoris, all muscles in the anterior and lateral compartments of the leg and extensor digitorum brevis.
What are the parts of the thoracic cavity?
The thoracic cavity has three compartments: the mediastinum and two pleural cavities. The mediastinum is home to the heart, trachea, great vessels, and some other structures. The pleural cavities are on either side of the mediastinum and contain the lungs and the pleural linings.
What are the three parts of sternum of the thorax?
The sternum is divided anatomically into three segments: manubrium, body, and xiphoid process. The sternum connects the ribs via the costal cartilages forming the anterior rib cage.
What structures make up the thoracic wall?
The thoracic wall consists of a bony framework that is held together by twelve thoracic vertebrae posteriorly which give rise to ribs that encircle the lateral and anterior thoracic cavity. The first nine ribs curve around the lateral thoracic wall and connect to the manubrium and sternum.
What supplies the posterior thoracic wall?
The thoracic wall is richly supplied with blood arising from three sources. These are the thoracic aorta, subclavian artery and axillary artery.
What is the innervation of the diaphragm quizlet?
What is the innervation of the diaphragm? The left half (Hemidiaphragm) is innervated by the left phrenic nerve and vice versa. The phrenic nerve comes from the cervical plexus. The majority of the arterial supply is from the inferior phrenic arteries, which arise directly from the abdominal aorta.