ANS Flashcards
Do capillary beds of the peripheral vascular system receive parasympathetic innervation?
No. They are controlled by sympathetic tone
The muscles of the iris receive what kind of innervation?
Both sympathetic and parasympathetic
Constriction of the pupillae is due to what kind of innervation?
Parasympathetic innervation (from Edinger-Westphalia nucleus in the occulomotor complex)
Dilation of the pupillae is due to what kind of innervation?
Sympathetic innervation (preganglionic cells located in the lateral horn of SC segments T1-T2)
The urinary bladder control is a result of what kind of innervation of the the detrusor muscle and trigone muscle (internal sphincter)
Balanced sympathetic (T11-L2) and parasympathetic (S1-S2)
Bladder filling is the result of what kind of innervation bias?
Sympathetic bias (slight relaxation of detrusor muscle and contraction of triagone)
Bladder emptying is the result of what kind of innervation bias?
Parasympathetic bias (contraction of detrusor muscle and relaxation of the trigone)
This structure serves as the “UMN” of the ANS?
Hypothalamus
Info from the hypothalamus, via the reticular formation pathways, influences what regions of the ANS?
Parasympathetic and Sympathetic
This region of the hypothalamus acts both on the SNS and PSNS through separate nuclei?
Ventromedial hypothalamus
This hypothalamic region activates the parasympathetic region?
Anterior hypothalamic regions
This hypothalamic region activates the sympathetic region of the ANS?
Posterolateral hypothalamus
This region is involved in the motor expression of rage, fear, and aversion (but has no role in feelings or emotions accompanied by these behaviors)
Hypothalamus
This region is were emotions arise and is involved in patterns of expression and behavior
Limbic System
Where are the cell bodies of the preganglionic neurons located?
CNS
Where are the cell bodies of the postganglionic neurons located?
Peripheral ganglion
Where are the preganglionic cell bodies of the SNS located?
Intermediolateral cell column (lateral horn)
T1-L2 (thoracolumbar)
What is the neurotransmitter of the preganglionic cell bodies of SNS
ACh (nicotinic)
What is the neurotransmitter of the postganglionic cell bodies?
Norepinephrine
Where are the preganglionic cell bodies of the PSNS located?
CN 3,6,9,10 and in the intermediolateral cell column of SC levels S2-S4
What is the neurotransmitter asssociated with preganglionic cell bodies of PSNS?
ACh (nicotinic)
What is the neurotransmitter of the postganglionic cell bodies of PSNS?
ACh (muscarinic)
