GROSS ANATOMY

GROSS ANATOMY

CRANIAL NERVES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Vagus Nerve
A
swallowing
B
saliva production
C
digestive and heart
D
tongue movements
Explanation: 

Detailed explanation-1: -What is the Vagus Nerve? The vagus nerve, also known as the vagal nerves, are the main nerves of your parasympathetic nervous system. This system controls specific body functions such as your digestion, heart rate and immune system. These functions are involuntary, meaning you can’t consciously control them.

Detailed explanation-2: -It is well accepted that the vagus nerve slows heart rate (HR), atrioventricular conduction and decreases atrial contraction, with vagus nerve stimulation (VNS) resulting in anti-arrhythmic effects and acting in a cardioprotective manner (Brack et al., 2013).

Detailed explanation-3: -Parasympathetic control of the heart via the vagus nerve is the primary mechanism that regulates beat-to-beat control of heart rate. Additionally, the vagus nerve exerts significant effects at the AV node, as well as effects on both atrial and ventricular myocardium.

Detailed explanation-4: -Lowering the heart rate and blood pressure: If the vagus nerve is overactive, it can lead to the heart being unable to pump enough blood around the body. In some cases, excessive vagus nerve activity can cause loss of consciousness and organ damage.

Detailed explanation-5: -The autonomic nervous system (ANS) is the component of the peripheral nervous system that controls cardiac muscle contraction, visceral activities, and glandular functions of the body.

There is 1 question to complete.