Lab 10 - ANS Flashcards
What polarity do the ganglion cells displayed exhibit?
Pseudounipolar (these are sensory ganglion cells).
Why are sympthetic ganglion cells less tightly packed than those of spinal ganglia?
They must allow space between cell bodies for synapsing.
Where are the cell bodies of pre- and post-ganglionic sympathetic neurons found?
What synapses on the pre-ganglionic sympathetic cell bodies?
In the intermediolateral cell column and chain ganglia (or splanchnic ganglia, adrenal medulla).
Descending hypothalamic fibers from the paraventricular nucleus.
Name the four brainstem parasympathetic nuclei.
At what brainstem levels are they located?
Edinger-Westphal (rostral midbrain), Superior Salivary (caudal pons), Inferior Salivary (rostral medulla), Dorsal Motor (rostral medulla).
What are the cause and symptoms of Horner’s syndrome?
Miosis/Ptosis/Anhidrosis/Erythematosis.
Caused by lesion of sympathetic input to eye (ciliary ganglion).
Why does sympathetic efferent to the eye have to travel down to T1-3?
White rami communicantes only exist at the T1-L2 levels. Since this is the site of sympathetic outflow from the intermediolateral cell column, these afferents must descend to here, exit, then ascend in the chain to the superior cervical ganglion (then ICA).
