Autonomic Nervous System Flashcards
Two divisions of the ANS
Sympathetic (thoracolumbar) nervous system - in the CNS preganglionic neurons extend over spinal cord segments T1 - L2
Parasympathetic (craniosacral) nervous system - in the CNS preganglionic neurons include CN III, VII, IX, X and spinal cord segments S2 - S4
Where does sympathetic innervation come from?
Since ALL preganglionic sympathetics originate in the thoracolumbar spinal cord segments (T1 - L2), sympathetic innervation to the head as well as to the viscera and extremities must come from this region of the cord.
Contrast the differences between afferents and efferents of the visceral nervous system, noting the location of the cell bodies and the morphological structure of the cell bodies for each.
Preganglionic neuron -
cell body located in the CNS and axon terminates in the ganglion
Postganglionic neuron -
cell body located in the ganglion and axon terminates in or near the end organ (target organ)
What course may the sympathetic preganglionic neuron take once it has entered the sympathetic chain?
a
Trace the sympathetic preganglionic neuron from its cell body to the sympathetic chain.
a
What spinal cord segments give rise to sympathetic preganglionic neurons and where are the cell bodies of these neurons located? Where will the preganglionic neurons terminate?
a
Contrast the location of the sympathetic paravertebral and prevertebral ganglia and how each of these ganglia are innervated.
a
How do sympathetic postganglionic neurons reach their destination in order join the spinal nerves, innervate structures in the head, and supply the heart, lungs and other thoracic structures?
a
Compare the innervation of the adrenal (suprarenal gland) medulla with innervation of other abdominal organs.
a
What cranial nerves give rise to the parasympathetic nervous system?
a
Differentiate between the origin (preganglionic or presynaptic neurons) of the cranial and sacral components of the parasympathetic nervous (craniosacral) system.
a
Differentiate between the sympathetic and parasympathetic division of the visceral motor system noting
-the location of the preganglionic (presynaptic) cells,
a
Compare the functional aspects of the sympathetic and parasympathetic nervous system.
a
Contrast the function of visceral and somatic sensory fibers, and the location of their cell bodies.
a
Differentiate between the sympathetic and parasympathetic division of the visceral motor system noting
-the location of the postganglionic (postsynaptic) cells,
A
