AutonomicNervousSystem

emDocs post containing very useful emergency medicine information  

This video is part of a playlist of short videos which are intended to combine multiple choice questions' answering experience with an improved understanding...  

 

After watching the two parts of this video session, it is expected that you will be able to:  Explain how the sympathetic part of the autonomic nervous syst...  

Orthostatic hypotension is a physical finding defined by the American Autonomic Society and the American Academy of Neurology as a systolic blood pressure decrease of at least 20 mm Hg or a diastolic blood pressure decrease of at least 10 mm Hg within three minutes of standing. The condition, which may be symptomatic or asymptomatic, is encountered commonly in family medicine. In healthy persons, muscle contraction increases venous return of blood to the heart through one-way valves that prevent blood from pooling in dependent parts of the body. The autonomic nervous system responds to changes in position by constricting veins and arteries and increasing heart rate and cardiac contractility. When these mechanisms are faulty or if the patient is hypovolemic, orthostatic hypotension may occur. In persons with orthostatic hypotension, gravitational opposition to venous return causes a decrease in blood pressure and threatens cerebral ischemia. Several potential causes of orthostatic hypotension include medications; non-neurogenic causes such as impaired venous return, hypovolemia, and cardiac insufficiency; and neurogenic causes such as multisystem atrophy and diabetic neuropathy. Treatment generally is aimed at the underlying cause, and a variety of pharmacologic or nonpharmacologic treatments may relieve symptoms.  

The facial nerve is the seventh cranial nerve, or simply cranial nerve VII.  

Starting in the spinal cord, this video takes you step-by-step through the sympathetic and parasympathetic pathways related to the organs of the thorax, abdo...  

In patients presenting with facial weakness, the first priority is to exclude an upper motor neurone lesion; important associated signs may include concurrent limb weakness, hyper-reflexia, upgoing plantars, or ataxia  

In patients presenting with facial weakness, the first priority is to exclude an upper motor neurone lesion; important associated signs may include concurrent limb weakness, hyper-reflexia, upgoing plantars, or ataxia  

In patients presenting with facial weakness, the first priority is to exclude an upper motor neurone lesion; important associated signs may include concurrent limb weakness, hyper-reflexia, upgoing plantars, or ataxia  

 

Dysautonomia, also known as autonomic nervous system dysfunction, is a complex and serious health concern that affects millions.  

Autonomic Nervous System Overview. Autonomic Nervous System Overview.  

Your autonomic nervous system is made up of nerves that control those “automatic” things you need to do to survive. Autonomic dysfunction or dysautonomia refers to problems with this autonomic nervous system.  

 

 

http://www.anatomyzone.com Neuroanatomy tutorial on the sympathetic nervous system. In this short tutorial, we take a look at the basic configuration of the ...  

http://www.anatomyzone.com 3D anatomy tutorial providing an introduction to the anatomy and basic function of the autonomic nervous system using the BioDigit...  

http://www.anatomyzone.com 3D anatomy tutorial providing an introduction to the anatomy and basic function of the autonomic nervous system using the BioDigit...  

http://www.anatomyzone.com Anatomy tutorial on the parasympathetic nervous system. This video tutorial was created using images from our partners at OpenStax...