The eye pupil is the hole in the middle of the iris, the colored part of the eye. Pupils dilate and shrink in response to light; two muscles control pupil size, according to "Fundamentals for Ophthalmic Personnel." Pupillary reactions are...
Cavernous sinus thrombosis (CST) is a rare complication of facial infections. A blood clot forms in the cavernous sinus, stopping blood flow. The cavernous sinus is located in the skull and drains deoxygenated blood from the brain and face back to...
A brain bleed is a medical emergency that occurs when you have head trauma or suffer a stroke. Brain bleeds can occur within your brain (intracranial hemorrhage) or on the outer portions of your brain (subarachnoid hemorrhage). Sometimes the blood...
Frontal lobe brain tumors can be cancerous or noncancerous. Both types of tumors can cause symptoms for a variety of reasons. Tumors can destroy brain cells, causing permanent brain damage and inflammation as well as placing pressure on tissues...
Children are at risk for head injury from playing sports, bicycle and recreational accidents and vehicular accidents. These injuries can be serious, resulting in permanent brain damage and death if severe enough. A child with a head injury may not...
Exercise headaches develop after vigorous physical activity. According to MayoClinic.com, these headaches are usually benign, and are categorized as primary exercise headaches. Headaches due to medical problems are called secondary headaches; in...
Each year millions of people suffer a head injury. Most of these injuries are not significant due to the bony structure of the head. Because the skull protects the delicate brain, most head injuries tend to be cuts and bruises. According to the...
According to the Mayo Clinic, neuroblastoma is a form of cancer that originates from nerve cells. Sometimes, this cancer can form in your adrenal gland (located above your kidneys), stomach, chest and pelvis. Typically, neuroblastoma affects...
The iris is the colored muscle, called the sphincter muscle, of the eye that expands and contracts the pupil to control the amount of light entering the eye. In an eye that functions properly, the pupil will appear larger in low light and look...
Bumps to your child's head occur during the course of normal play and exploration, especially for youngsters who lack coordination. In most cases, a bump to the head is treatable at home, but more serious head injuries require an exam by a doctor....
Hypoglycemia is the medical term for low blood glucose or low blood sugar, which occurs when glucose in the blood drops below levels considered to be normal. There are many food sources of glucose including carbohydrates such as rice, potatoes,...
Low blood sugar, also called hypoglycemia, happens when your blood sugar, or glucose, levels drop below the normal levels. Glucose is converted from food into energy for the body. Hypoglycemia can happen suddenly, according to the National...
Gazing into your baby's eyes can do more than fill you with a thrill. It can also give you a chance to check for certain conditions that merit a trip to the doctor, website Kids Health points out. Different sized pupils, eyes that move...
