Identify the origin of sympathetic nerve fibres and the location of their ganglia

Options

A. They arise from thoraco-lumber region of spinal cord and form ganglia just beside the vertebral column
B. They arise from thoraco-cervical region of spinal cord and form ganglia just beside the vertebral column
C. They arise from cranio-sacral region of spinal cord and form ganglia very close to effector organ.
D. They arise from thoraco-lumber region of spinal cord and form ganglia very close to effector organ

Answer

A

Explanation

The sympathetic division of the ANS is also called the thoraco – lumbar division because the outflow of sympathetic nerve impulse comes from the thoracic and lumbar segments of the spinal cord. The pre – ganglionic axons emerge from the spinal cord through the anterior root of a spinal nerve along with axons of somatic motor neurons.