The BBC describes a reflex arc as the nerve pathway through which neural impulses travel to cause a quick autonomic response known as a reflex. Reflexes are not something people think about, rather, they are impulsive reactions to stimuli.Know More
An example illustrated by class notes from Rutgers University explains that when a person touches a flame or hot surface with his hand, his immediate reaction is to remove his hand from the heat to prevent getting burned. This decision, or reflex, is not a conscious one. In general, there are five parts of a reflex: receptor, the sense organ, such as skin muscle or another organ; sensory neuron, which is in charge of carrying the neural message to the central nervous system; interneuron, which carries the message within the central nervous system; motor neuron, which carries the impulse away from the central nervous system; and effector, the structure that reacts and exhibits a response.
According to Rutgers University, the reflex response can be more involved. For example, if a person steps on a sharp object, the reflex is to lift his foot off the object. There is also the stabilization of the other leg as he lifts his foot off the ground. This means this type of reflex response involves some consciousness.Learn more in Nerves
The corneal reflex is an involuntary closing of the eyelids when the cornea is touched by a foreign object. The function of this reflex is to protect the eye from damage. Absence of a corneal reflex may indicate damage to the fifth and seventh cranial nerves, which mediate the reflex.Full Answer >
An example of a contralateral reflex would be when someone steps on a nail. Once their foot comes into contact with the nail, they put their weight down on the other leg and pull the other one back as a reflex.Full Answer >
Visceral reflex arcs and somatic reflex arcs differ in the end point of the arc: Visceral reflex arcs end at involuntary muscles and glands, and somatic reflex arcs end at voluntary skeletal muscles. Both reflex arcs go from sensory nerves to their endpoints through the central nervous system.Full Answer >
Nerve ablation is the erosion or removal of nerve tissue. This is usually done intentionally by a medical professional to ease pain from chronic conditions such as arthritis. Due to the delicate nature and sensitivity of nerve tissue, the technique used is not surgical, but rather uses radiation.Full Answer >