Anatomy Exam I Dr Matz

Front 1

Where are the sympathetic neuronal cell bodies found in:
1. Visceral Efferent(motor)?
2. Splachnic visceral efferent (motor)?

Back 1

1.Preganglionic- lateral horn of T1-L2. Postganglionic- sympathetic chain ganglion
2. preganglionic- lateral horn, postganglionic- prevertebral (preaortic) ganglion

Front 2

1. where do presynaptic nerves terminate in the sympathetic nervous system?

Back 2

Presynaptic nerves' axons terminate in either the paravertebral ganglia(sympathetic chain) or prevertebral ganglia(preaortic). This can occur through one of four methods:

1. The nerve enters the paravertebral ganglion at the level of its originating spinal nerve, and then ascends to a more superior paravertebral ganglion, where it synapses with the postsynaptic cell.

2. The nerve enters the paravertebral ganglion at the level of its originating spinal nerve and synapses with the postsynaptic cell at that level.

3. The nerve enters the paravertebral ganglion at the level of its originating spinal nerve, and then descends to a more inferior paravertebral ganglion, where it synapses with the postsynaptic cell.

4. The nerve enters the paravertebral ganglion at the level of its originating spinal nerve and then descends to a prevertebral ganglion, where it synapses with the postsynaptic cell.

Front 3

1. Describe the length of pre vs post ganglionic (synaptic) neurons of the Sympathetic Nervous System.

Back 3

1. Because paravertebral and prevertebral ganglia are relatively close to the spinal cord, presynaptic neurons are generally much shorter than their postsynaptic counterparts, which must extend throughout the body to reach their destinations.

Front 4

1. describe splanchnic nerves

Back 4

1.The splanchnic nerves are paired nerves that contribute to the innervation of the viscera, carrying fibers of the autonomic nervous system (visceral efferent fibers) as well as sensory fibers from the organs (which are also known as visceral afferent fibers). All carry sympathetic fibers except for the pelvic splanchnic nerves, which carry parasympathetic fibers.