Podcast
Questions and Answers
How does the Autonomic Nervous System (ANS) functionally maintain homeostasis?
How does the Autonomic Nervous System (ANS) functionally maintain homeostasis?
How does the ANS differ from the Somatic Nervous System anatomically?
How does the ANS differ from the Somatic Nervous System anatomically?
Which division of the ANS predominates during resting conditions?
Which division of the ANS predominates during resting conditions?
What is the primary function of the Sympathetic Nervous System (SyNS)?
What is the primary function of the Sympathetic Nervous System (SyNS)?
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Which division of the autonomic nervous system has preganglionic neuronal cell bodies located in brainstem cranial nerve nuclei?
Which division of the autonomic nervous system has preganglionic neuronal cell bodies located in brainstem cranial nerve nuclei?
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Which cranial nerves carry axons for the parasympathetic division?
Which cranial nerves carry axons for the parasympathetic division?
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Which part of the body receives parasympathetic innervation via the pelvic splanchnic nerves?
Which part of the body receives parasympathetic innervation via the pelvic splanchnic nerves?
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Which division of the autonomic nervous system innervates the viscera of the face?
Which division of the autonomic nervous system innervates the viscera of the face?
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Which part of the body receives parasympathetic innervation via the vagus nerve?
Which part of the body receives parasympathetic innervation via the vagus nerve?
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Which division of the autonomic nervous system innervates the urinary bladder?
Which division of the autonomic nervous system innervates the urinary bladder?
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Which part of the body receives sympathetic innervation from spinal cord levels T1 – T5?
Which part of the body receives sympathetic innervation from spinal cord levels T1 – T5?
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Which division of the autonomic nervous system has ganglionic neurons located in the sympathetic chain ganglia?
Which division of the autonomic nervous system has ganglionic neurons located in the sympathetic chain ganglia?
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Which part of the body receives sympathetic innervation via the celiac ganglion?
Which part of the body receives sympathetic innervation via the celiac ganglion?
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Which division of the autonomic nervous system has preganglionic neurons located in the IML cell column, S2-S4?
Which division of the autonomic nervous system has preganglionic neurons located in the IML cell column, S2-S4?
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Which part of the body receives sympathetic innervation via the superior mesenteric ganglion?
Which part of the body receives sympathetic innervation via the superior mesenteric ganglion?
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Which division of the autonomic nervous system generally antagonizes the sympathetic division?
Which division of the autonomic nervous system generally antagonizes the sympathetic division?
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Where are the preganglionic neurons of the parasympathetic nervous system located?
Where are the preganglionic neurons of the parasympathetic nervous system located?
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Which part of the body is controlled by the sympathetic nervous system?
Which part of the body is controlled by the sympathetic nervous system?
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Where are the postganglionic neurons of the parasympathetic nervous system located?
Where are the postganglionic neurons of the parasympathetic nervous system located?
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Which part of the body is innervated by postganglionic sympathetic neurons in prevertebral ganglia?
Which part of the body is innervated by postganglionic sympathetic neurons in prevertebral ganglia?
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Where are the preganglionic neurons of the sympathetic nervous system located?
Where are the preganglionic neurons of the sympathetic nervous system located?
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Which part of the body is innervated by postganglionic sympathetic neurons in paravertebral ganglia?
Which part of the body is innervated by postganglionic sympathetic neurons in paravertebral ganglia?
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What acts as a modified sympathetic ganglion, releasing epinephrine and norepinephrine into the bloodstream?
What acts as a modified sympathetic ganglion, releasing epinephrine and norepinephrine into the bloodstream?
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Where does the somatic innervation occur?
Where does the somatic innervation occur?
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Where do the preganglionic sympathetic fibers target different dermatomes?
Where do the preganglionic sympathetic fibers target different dermatomes?
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Where is the sensory input via dorsal horns received?
Where is the sensory input via dorsal horns received?
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Where does the sympathetic nervous system innervate the body wall & limbs through postganglionic neurons?
Where does the sympathetic nervous system innervate the body wall & limbs through postganglionic neurons?
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Where does the sympathetic nervous system target the smooth muscle of limbs & body wall?
Where does the sympathetic nervous system target the smooth muscle of limbs & body wall?
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Study Notes
Autonomic Nervous System Organization
- Autonomic nervous system (ANS) consists of sympathetic (SyNS) and parasympathetic (PSyNS) divisions
- SyNS controls most vascular smooth muscle, limbs & body wall; PSyNS controls digestion
- SyNS preganglionic neurons in spinal cord (T1-L2), PSyNS in brainstem & spinal cord (S2-S4)
- SyNS postganglionic neurons in sympathetic ganglia near spinal cord, PSyNS ganglia in effector organs
- Spinal grey matter: sensory input via dorsal horns, somatic motor via ventral horns, autonomic via IML
- SyNS targets smooth muscle of limbs & body wall, viscera of head & thorax, and abdomen & pelvis
- Somatic innervation: skeletal muscle by somatic motor neurons, sensory input via dorsal root ganglia
- SyNS innervates body wall & limbs through postganglionic sympathetic neurons in paravertebral ganglia
- Preganglionic sympathetic fibers can ascend or descend within the sympathetic chain to target different dermatomes
- SyNS innervates thoracic viscera and face through postganglionic sympathetic neurons in paravertebral ganglia
- Abdominopelvic viscera innervated by postganglionic sympathetic neurons in prevertebral ganglia
- Adrenal medulla acts as a modified sympathetic ganglion, releasing epinephrine and norepinephrine into the bloodstream
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Description
Test your knowledge of the organization of the autonomic nervous system (ANS) with this quiz. Explore the divisions, control of smooth muscle, location of preganglionic neurons, innervation of different body regions, and the role of sympathetic ganglia.
