cardiac plexus การใช้

• Wrisberg studied the sympathetic nervous system and described the Wrisberg ganglion of the cardiac plexus.
• Both sympathetic and parasympathetic stimuli flow through the paired cardiac plexus near the base of the heart.
• There is suspected variability in the configuration of these branches to the cardiac plexus, trachea, esophagus and inferior pharyngeal constrictor muscle.
• The cardiovascular centres receive input from a series of visceral receptors with impulses traveling through visceral sensory fibers within the vagus and sympathetic nerves via the cardiac plexus.
• On the left side, the middle cardiac nerve enters the chest between the left carotid and subclavian arteries, and joins the left half of the deep part of the cardiac plexus.
• The recurrent laryngeal nerves supply sensation to the larynx below the vocal cords, gives cardiac branches to the deep cardiac plexus, and branches to the trachea, esophagus and the inferior constrictor muscles.
• :The heart contains a number of small ganglia ( clusters of nerve cells ), and also the cardiac plexus, a network of nerve fibers that distribute signals to various parts of the heart.
• Above, it is connected to the concavity of the proximal descending aorta by the ligamentum arteriosum, on the left of which is the left recurrent nerve, and on the right the superficial part of the cardiac plexus.
• This ramus then enters the spinal nerve and is sent to its synapsing target, or becomes a visceral branch to enter a plexus ( e . g . the superficial or deep cardiac plexuses ), or synapses directly onto a target.
• The only cardiac nerves which do not enter into the formation of the deep part of the cardiac plexus are the superior cardiac nerve of the left sympathetic trunk, and the lower of the two superior cervical cardiac branches from the left vagus nerve, which pass to the superficial part of the plexus.
• On the right side it descends behind the common carotid artery, and at the root of the neck runs either in front of or behind the subclavian artery; it then descends on the trachea, receives a few filaments from the recurrent nerve, and joins the right half of the deep part of the cardiac plexus.