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.
over 12 years ago
A presentation on the visual system, explains the basic concepts of Anatomy, Physiology, Embryology, Pathology and a little information on examination. It's a great presentation for teaching purposes.
almost 9 years ago
"Stroke Series" video 1 of 7: Hypertensive haemorrhage and lobar haemorrhage are two distinct forms of haemorrhagic stroke. This video discusses the imaging characteristics of hypertensive haemorrhage, the underlying pathology (Charcot-Bouchard aneurysms) and the relevant differential diagnosis.
about 8 years ago
"Stroke Series" video 2 of 7: Lobar haemorrhage and hypertensive haemorrhage are two distinct forms of haemorrhagic stroke. This video discusses the imaging characteristics of primary lobar haemorrhage, the underlying pathology (cerebral amyloid angiopathy) and the relevant differential diagnosis.
about 8 years ago
An easy way to draw the basic components of the brachial plexus. On paper, it's pretty easy to draw the brachial plexus using this method in around 10 seconds. I know I fumbled on a few words here and there but that shouldn't distract from how easy it can be to draw the brachial plexus.
over 7 years ago
A 22-year-old woman from the Netherlands suffering from chronic bone disorder had increased thickness of the skull from 1.5cm to 5cm, causing reduced eyesight and severe headaches.
about 7 years ago
over 6 years ago