Autonomic Nervous System

Question 1

Autonomic Reflex: 1. Pathway 2. Effect

Bainbridge

Answer 1

1. Increase CVP –> Atrial Stretch –> Vagus 2. Increased Heart Rate. Seen with volume loading and auto transfusion

Question 2

Autonomic Reflex: 1. Pathway 2. Effect

Bezold-Jarisch

Answer 2

1. Vagal Tone, Spinal Anesthesia 2. Bradycardia, peripheral vasodilation, and hypotension, cardiovascular collapse.

Question 3

Autonomic Reflex: 1. Pathway 2. Effect

oculo-cardiac reflex

Answer 3

1. stretch receptors in extraocular muscles or globe itself -> ciliary nerves -> trigeminal nerve -> gasserian ganglion -> vagal 2. Bradycardia

Question 4

Way to prevent the oculo-cardiac reflex

Answer 4

Phx retrobulbar block

Question 5

Autonomic Reflex: 1. Pathway 2. Effect

Baroreceptor

Answer 5

1. Increase mean arterial pressure -> stretch receptors -> Vagal 2. Bradycardia

Question 6

Cardiac Accelerator Fibers

Answer 6

T1-T4