Etymology: L, crena, notch. the formation of notches or leaflike scalloped edges on an object. Red blood cells exposed to a hypertonic saline solution acquire a notched, shriveled surface as a result of the osmotic effect of the solution. They are then called crenated red blood cells. crenate, crenated, adj.
Occipital neuralgia is the neck/head pain that results from injury or irritation to the occipital nerves. It can be caused by trauma, such as a car accident, by a pinched nerve root in the neck (from arthritis, for example) or by âtightâ muscles at the back of the head that entrap the nerves.
The pain typically starts at the base of the skull by the nape of the neck and may spread to the area behind the eyes and to the back, front and side of the head. Causes. Occipital neuralgia is a headache syndrome that can be either primary or secondary.he pain typically starts at the base of the skull by the nape of the neck and may spread to the area behind the eyes and to the back, front and side of the head. Causes. Occipital neuralgia is a headache syndrome that can be either primary or secondary.