Question

o What structures are located in sympathetic trunk ganglia? What division of the nervous system are they a part of?

o What spinal nerves make up the cervical plexus? Brachial plexus? Lumbar plexus? Sacral plexus?

Answer 1

1. ANSWER: The sympathetic trunk ganglion also called the autonomic ganglion is located on either side of the spinal cord and has both afferent and efferent fibres. The structures located on this sympathetic ganglion are eyes, heart, lacrimal glands, parotid gland, trachea, bronchi, larynx, esophagus, stomach, gall bladder, adrenal, small intestine, large intestine, rectum, kidney, bladder. This division forms the Autonomic nervous system of the body.

2. ANSWER: Cervical plexus- anterior rami of first four cervical spinal nerve from C1 to C4 in the neck.

Brachial plexus- anterior rami of lower four cervical and first thoracic spinal nerve C5 to T1 of the body.

Lumbar plexus- it is formed from the divisions of first four lumbar nerves and a minor contribution from last thoracic nerve L1 to L4 and T12.

Sacral plexus- Anterior fibres of spinal nerves S1 S2 S3 S4.