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Microbiology All India exam 4a9a814b

The following statements concerning the abdominal pa of the sympathetic trunk are not true Except

A
It enters the abdomen behind the lateral arcuate ligament
B
The trunk passes in 6 segmentally arranged ganglia
C
All the ganglia receive white rami communicantes
D
Gray rami communicantes are given off to the lumbar spinal nerves
High-Yield Explanation
The abdominal poion of the sympathetic trunk is situated in front of the veebral column, along with the medial margin of the Psoas major.It consists usually of four lumbar ganglia, connected together by interganglionic cords. It is continuous above with the thoracic poion beneath the medial lumbocostal arch, and below with the pelvic poion behind the common iliac aery.The ganglia are of small size and placed much nearer the median line than are the thoracic ganglia.Gray rami communicate pass from all the ganglia to the lumbar spinal nerves. The first and second, and sometimes the third, lumbar nerves send white rami communicates to the corresponding ganglia.The rami communicate are of considerable length, and accompany the lumbar aeries around the sides of the bodies of the veebrae, passing beneath the fibrous arches from which some of the fibres of the Psoas major arise.

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