Talasia Hydrocephalus Angle | Health Dictionary

Talasia Hydrocephalus Angle | Health Dictionary

Keywords of this word: Talasia Hydrocephalus Angle


HYDROCEPHALUS

Medical Dictionary

An abnormal accumulation of CEREBROSPINAL FLUID, or CSF, within the skull, as a result of one or more of three main causes: (i) excessive CSF production; (ii) defective CSF absorption;

(iii) blockage of the circulation of CSF. Such disturbances in the circulation of the ?uid may be due to congenital reasons (most commonly associated with SPINA BIFIDA), to MENINGITIS, or to a tumour.

Symptoms In children, the chief symptoms observed are the gradual increase in size of the upper part of the head, out of all proportion to the face or the rest of the body. The head is globular, with a wide anterior FONTANELLE and separation of the bones at the sutures. The veins in the scalp are prominent, and there is a ‘crackpot’ note on percussion. The normal infant’s head should not grow more than 2·5 cm (1 inch) in each of the ?rst two months of life, and much more slowly subsequently; growth beyond this rate should arouse suspicions of hydrocephalus, so medical professionals caring for infants use centile charts for this purpose.

The cerebral ventricles are widely distended, and the convolutions of the brain ?attened, while occasionally the ?uid escapes into the cavity of the cranium, which it ?lls, pressing down the brain to the base of the skull. As a consequence of such changes, the functions of the brain are interfered with, and in general the mental condition of the patient is impaired. Untreated, the child is dull and listless, irritable and sometimes su?ers from severe mental subnormality. The special senses become a?ected as the disease advances, especially vision, and sight is often lost, as is also hearing. Towards the end, paralysis is apt to occur.

Treatment Numerous ingenious operations have been devised for the treatment of hydrocephalus. The most satisfactory of these utilise unidirectional valves and shunts (tubes), whereby the cerebrospinal ?uid is bypassed from the brain into the right atrium of the heart or the peritoneal cavity. The shunt may have to be left in position inde?nitely.... Medical Dictionary

LANGLEY

Medical Dictionary

(English) From the long meadow Langly, Langli, Langlie, Langlee, Langleigh, Langlea... Medical Dictionary