part of part of paravertebral ganglion lower back abdominal ganglion lumbar ganglion 2025-02-13T17:25:41Z FMA:6472 In humans there are four lumbar ganglia and they are positioned anterolateral to the lumbar vertebrae and deep to the psoas major muscle. lumbar paravertebral ganglion UBERON:8600121 lumbar sympathetic ganglion A ganglion that is part of the lumbar portion of the sympathetic trunk. The neurons in a lumbar ganglion are postganglionic sympathetic neurons that synapse with axons from preganglionic sympathetic neurons.