Suboccipital: Areabelow the
occipital bone; beneath the back of the head.
Subperiosteal: Beneath the periosteum (the membrane
covering of the bones).
Sulcus: A furrow, fissure or depression of the brain.
Supine: Lying with the back or dorsal surface downward.
Sylivan Aqueduct: A narrow canal that passes from the
third to the fourth ventricle.
Syncope: A temporary cessation of breathing and
circulation (partial or complete ). This condition is due to cerebellar
ischemia.
Syringo: Relationship to a tube or fistula (abnormal
tube like passage from a normal tube or cavity to a free surface or cavity).
Syringomyelia (SM): A chronic disease of the spinal
cord characterized by the development of fluid-filled cavities of
surrounding tissues.
Syringotomy: An operation performed to excise a fistula
(an abnormal tube-like passage).
Syrinx: A tube, pipe or cavity.
Telencephalon: The anterior division or the embryonic
endbrain of the prosencephalon from the cerebral hemispheres, corpora
striata and the rhinencephalon develop.
Tentorium: A tent-like structure in the brain.
Tethered Cord: A defect in the fusion of the spinal
processes and laminas found in the spinal bifida occulta. Sometimes the
spinal cord is trapped at the level of the defect and may result in
neurologic dysfunction.
Thoracic: Pertaining to the chest.
Tinnitus: A ringing, buzzing or tinkling sound in the
ear.
Torticollis: A state of excessive of inadequate muscle
tone in the muscles in the neck that control the position of the head. It
may be acquired or congenital.
Trachea: A tube-like portion of the respiratory tract
that connects the larynx.
Trachea Malasia: Softening of the cartilage of the
trachea.
Trophic: Relating to the nourishment; applied to a type
of nerve believed to control the growth and nourishment of the parts they
enervate (supply).
Unilateral: Relating to one side.
Ventral: Pertaining to the front or anterior of any
structure.
Ventricle: A cavity similar to those of the brain that
are filled with cerebrospinal fluid.
Ventriculography: An X-ray used for visualizing the
size and shape of the brains ventricles by injecting air to displace the
CSF, which normally fills this space.
Ventriculo peritoneal Shunt: A shunt or tube inserted
into the ventricles of the brain which us attached to tubing placed into the
abdominal or peritoneal cavity to drain excess spinal fluid from the brain.
Ventriculostomy: A neurosurgical procedure performed to
establish an opening the third ventricle to relieve hydrocephalus.
Ventriculo-subarachnoid Shunt: A shunt or tube inserted
in the space occupied by the cerebral spinal fluid (CSF).
Vermis: Anarrow, wormlike structure between the
hemispheres of the cerebellum.
Visceral: Referring to the viscera, the internal organs
of the body, specifically those within the chest such as the heart or lungs
or abdomen as the liver, pancreas or intestines.
Weakness: Lack of strength, also known as muscle
fatigue.
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