3. Physiology
        3.11. Neurophysiology
            3.11.8. Autonomic nervous system
3.11.8.3. Effects of ANS stimulation

Effects of ANS stimulation

Some organs the two system act against each other.

Most organs are dominately controlled by one of the systems (not both).

 

Sympathetic vs parasympathetic

Sympathetic

Parasympathetic

Tone

Sympathetic tone constricts systemic arterioles to about 1/2 of maximum diameter.

Parasympathetic tone maintains normal GIT motility.

Dual innervation

Most organs are innervated by both, but in most, one system dominate.

Some organs only have sympathetic innervation

 

Sympathetic and parasympathetic stimulation

Eyes

Sympathetic stimulation

Parasympathetic stimulation

Nasal, lacrimal, salivary, and GIT glands

Sympathetic stimulation

Parasympathetic stimulation

Sweat glands

Sympathetic stimulation

Parasympathetic stimulation

Apocrine glands

Sympathetic stimulation

Parasympathetic stimulation

GIT

Sympathetic stimulation

Parasympathetic stimulation

Lung

Sympathetic stimulation

Parasympathetic stimulation

Heart

Sympathetic stimulation

Parasympathetic stimulation

Systemic blood vessels

Sympathetic stimulation

Parasympathetic

Arterial blood pressure

Sympathetic stimulation

Parasympathetic

Urinary bladder

Sympathetic stimulation

Parasympathetic stimulation

Genitalia - male

Sympathetic stimulation

Parasympathetic stimulation

Genitalia - female

Sympathetic stimulation

Parasympathetic stimulation

Adrenal medulla

Sympathetic stimulation causes secretion of:

which last 5-10 times longer than when released by sympathetic neurons.

Kidney

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