| valve of pulmonary trunk | <anatomy, cardiology> The heart valve that divides the right ventricle and the pulmonary artery. The pulmonic valve opens when the right ventricle contracts allowing blood to flow into the pulmonary artery. The pulmonic valve on closure prohibits the backwash of unoxygenated blood into the right ventricle. The pulmonic valve has 3 valve cusps. (27 Sep 1997) |
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| ganglia of sympathetic trunk | The clusters of postganglionic neurons located at intervals along the sympathetic trunks, including the superior cervical, middle cervical, and cervicothoracic (stellate) ganglion, the thoracic, lumbar, and sacral ganglia, and the ganglion impar. Synonym: ganglia trunci sympathici, paravertebral ganglia. (05 Mar 2000) |
| ganglion of trunk of vagus | <anatomy, nerve> A large sensory ganglion of the vagus, anterior to the internal jugular vein. Synonym: ganglion inferius nervi vagi, ganglion of trunk of vagus, nodose ganglion. (05 Mar 2000) |
| gastric branches of anterior vagal trunk | Anterior gastric branches of the vagus; branches of the anterior vagal trunk to the anterior surface of the stomach. Synonym: rami gastrici anteriores nervi vagi. (05 Mar 2000) |
| gastric branches of posterior vagal trunk | Posterior gastric branches; branches of the posterior vagal trunk to the posterior surface of the stomach. Synonym: rami gastrici posteriores nervi vagi. (05 Mar 2000) |
| middle trunk of brachial plexus | The continuation of the ventral ramus of the seventh cervical nerve; it contributes fibres to the posterior and lateral cords (fasciculi) of the brachial plexus. Synonym: truncus medius plexus brachialis. (05 Mar 2000) |
| coeliac trunk | Origin, abdominal aorta just below diaphragm; branches, left gastric, common hepatic, splenic. Synonym: truncus coeliacus, arteria coeliaca, coeliac artery, coeliac axis, Haller's tripod. (05 Mar 2000) |
| communicating branches of sympathetic trunk | Short nerves arising from the lateral aspect of the sympathetic trunk conducting nonmyelinated postsynaptic sympathetic nerve fibres from the sympathetic trunk to the initial portions of all 31 pairs of ventral primary rami of spinal nerves for distribution by all parts (including the dorsal primary ramus) of the spinal nerve. The gray rami are the parietal branches of the sympathetic trunks since all postsynaptic fibres to be distributed to the body wall (including limbs) must pass through them. Synonym: communicating branches of sympathetic trunk, communicating rami of sympathetic trunk. (05 Mar 2000) |
| communicating rami of sympathetic trunk | Short nerves arising from the lateral aspect of the sympathetic trunk conducting nonmyelinated postsynaptic sympathetic nerve fibres from the sympathetic trunk to the initial portions of all 31 pairs of ventral primary rami of spinal nerves for distribution by all parts (including the dorsal primary ramus) of the spinal nerve. The gray rami are the parietal branches of the sympathetic trunks since all postsynaptic fibres to be distributed to the body wall (including limbs) must pass through them. Synonym: communicating branches of sympathetic trunk, communicating rami of sympathetic trunk. (05 Mar 2000) |
| costocervical trunk | A short artery that arises from the subclavian artery on each side and divides into deep cervical and superior intercostal branches, the latter dividing usually to form the first and second posterior intercostal arteries. Synonym: truncus costocervicalis, costocervical artery. (05 Mar 2000) |
| pulmonary trunk | Origin, right ventricle of heart; distribution, it divides into the right pulmonary artery and the left pulmonary artery, which enter the corresponding lungs and branch along with the segmental bronchi. Synonym: truncus pulmonalis, arteria pulmonalis, pulmonary artery, venous artery. (05 Mar 2000) |
| subclavian lymphatic trunk | It is formed by the union of the vessels draining the lymph nodes of either upper limb, emptying into the thoracic duct at the root of the neck on the left or into the right lymphatic duct. Synonym: truncus subclavius, subclavian duct. (05 Mar 2000) |
| superior trunk of brachial plexus | The nerve bundle formed by the union of the ventral rami of the fifth and sixth cervical nerves and some fibres from the fourth; it contributes fibres to the posterior and lateral cords (fasciculi) of the brachial plexus. Synonym: truncus superior plexus brachialis. (05 Mar 2000) |
| sympathetic trunk | One of the two long ganglionated nerve strands alongside the vertebral column that extend from the base of the skull to the coccyx; they are connected to each spinal nerve by gray rami and receive fibres from the spinal cord through white rami connecting with the thoracic and upper lumbar spinal nerves. Synonym: truncus sympathicus, gangliated cord. (05 Mar 2000) |
| inferior trunk of brachial plexus | The nerve bundle formed by the union of the ventral rami of the eighth cervical and first thoracic nerves; it provides fibres to the posterior and medial cords (fasciculi) of the brachial plexus. Synonym: truncus inferior plexus brachialis. (05 Mar 2000) |