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Vagus nerve

An edited version of my Friday Evening Discouse given to the Royal Institution on 11 April 2008. Abstract: The vagus nerves (cranial nerve X) connects our brainstem to the body, facilitating monitoring and control of many automatic functions; the vagus electrically links our gut, lungs and heart to the base of the brain in an evolutionarily-ancient circuit, similar between mammals and also seen in birds, reptiles, and amphibians. The vagus comprises a major part of the parasympathetic autonomic nervous system, contributing to the motor control of important physiological functions such as heart rate and gut motility. The vagus is also sensory, relaying protective visceral information leading to reflexes like cough and indication of lung volume. The vagus has been described as a neural component of the immune reflex. By monitoring changes in the level of control exerted by the vagus, apparent as beat by beat changes of heart rate, it is possible to indirectly view the effect of pharmaceuticals and disease on brainstem function and neural processes underlying consciousness. The paired vagus nerves of humans have different functions, and stimulation of the left vagus has been shown to be a therapeutic treatment for epilepsy, and may modulate the perception of pain.  
Chris Pomfrett
about 11 years ago
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26

Comparative Vertebrate Anatomy - shark muscles dissection

Dogfish shark dissection for muscles, including extrinsic eye muscles.  
YouTube
over 5 years ago
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27

Cat skull - comparative vertebrate anatomy

Feline skull features, no foramina though. Per Kardong  
YouTube
over 5 years ago
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1
29

Turtle Skull - comparative vertebrate anatomy

Snapping turtle (anapsid) skull and its anatomical features, per Kardong  
YouTube
over 5 years ago
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1
83

Comparative Vertebrate Anatomy - shark muscles dissection

Dogfish shark dissection for muscles, including extrinsic eye muscles.  
YouTube
about 5 years ago
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1
32

Cat skull - comparative vertebrate anatomy

Feline skull features, no foramina though. Per Kardong  
YouTube
about 5 years ago
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1
19

Turtle Skull - comparative vertebrate anatomy

Snapping turtle (anapsid) skull and its anatomical features, per Kardong  
YouTube
about 5 years ago
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0
18

Vertebrates 8- Mammals

Part 8 in an 8 part lecture on VERTEBRATES in a flipped General Biology course taught by Wendy Riggs. CC-BY. Watch the whole lecture (all 8 videos) by going ...  
youtube.com
over 4 years ago
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0
0

Vertebrates 8- Mammals - YouTube

Part 8 in an 8 part lecture on VERTEBRATES in a flipped General Biology course taught by Wendy Riggs. CC-BY. Watch the whole lecture (all 8 videos) by going ...  
youtube.com
over 4 years ago
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0
18

Vertebrates 7- Amniotic egg

Part 7 in an 8 part lecture on VERTEBRATES in a flipped General Biology course taught by Wendy Riggs. CC-BY. Watch the whole lecture (all 8 videos) by going ...  
youtube.com
over 4 years ago
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0
21

Vertebrates 6- Vertebrates

Part 6 in an 8 part lecture on VERTEBRATES in a flipped General Biology course taught by Wendy Riggs. CC-BY. Watch the whole lecture (all 8 videos) by going ...  
youtube.com
over 4 years ago
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0
0

Vertebrates 6- Vertebrates - YouTube

Part 6 in an 8 part lecture on VERTEBRATES in a flipped General Biology course taught by Wendy Riggs. CC-BY. Watch the whole lecture (all 8 videos) by going ...  
youtube.com
over 4 years ago
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0
21

Vertebrates 5- Hagfish

Part 5 in an 8 part lecture on VERTEBRATES in a flipped General Biology course taught by Wendy Riggs. CC-BY. Watch the whole lecture (all 8 videos) by going ...  
youtube.com
over 4 years ago
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0
0

Vertebrates 5- Hagfish - YouTube

Part 5 in an 8 part lecture on VERTEBRATES in a flipped General Biology course taught by Wendy Riggs. CC-BY. Watch the whole lecture (all 8 videos) by going ...  
youtube.com
over 4 years ago
Preview
0
22

Vertebrates 4- Lancelets

Part 4 in an 8 part lecture on VERTEBRATES in a flipped General Biology course taught by Wendy Riggs. CC-BY. Watch the whole lecture (all 8 videos) by going ...  
youtube.com
over 4 years ago
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0
0

Vertebrates 4- Lancelets - YouTube

Part 4 in an 8 part lecture on VERTEBRATES in a flipped General Biology course taught by Wendy Riggs. CC-BY. Watch the whole lecture (all 8 videos) by going ...  
youtube.com
over 4 years ago