One in our series on Easy Ways to remember tricky areas of anatomy covering the Autonomic Nerve Supply to the Eye and Principles of Pupil Control. Light and Near Reflexes you can find more material at www.instantanatomy.net
almost 5 years ago
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.
almost 9 years ago
This is the best online medical lectures site, providing high quality medical and nursing lectures for students across the globe. Our lectures are oversimplified for adequate learning, less memorization and proper understanding of difficult concept in clinical medicine.
over 3 years ago
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...
about 2 years ago
http://www.handwrittentutorials.com - This tutorial looks at the ways in which the Nervous System is divided and categorised, both functionally and anatomically. Concepts such as the CNS, PNS and the Autonomic Nervous system are discussed in detail. For more entirely FREE tutorials and the accompanying PDFs visit http://www.handwrittentutorials.com
over 3 years ago
Fastbleep offers the opportunity to support a growing social network of healthcare students and educators as they consider patient care, undertake professional development and share knowledge.
almost 3 years ago
Adrenergic Receptors Adrenergic receptors are divided into two major classes: alpha-adrenergic receptors and beta-adrenergic receptors. These classes have been further subdivided into alpha1- and alpha2-adrenergic receptors and beta1- and beta2-adrenergic receptors. Alpha1-adrenergic receptors are located on the membranes of postsynaptic […]
over 2 years ago
Male Reproductive System Sympathetic Innervation The sympathetic preganglionic neurons innervating the male reproductive system (i.e., epididymis, vas deferens, seminal vesicles, and prostate glands) are located in the IML at the T12-L2 level. Their preganglionic fibers pass through the sympathetic chain, […]
over 2 years ago