Glossary

Transcranial doppler. A diagnostic technique using high frequency sound waves to measure the direction and amount of blood flow in a region of the brain.

Tethered (Spinal) Cord Syndrome – A condition where the spinal cord is pulled at the base of the spinal canal. In another words, the spinal cord is literally tethered. The condition occurs in a group of disorders of the spinal cord including tight filum terminale, lipomeningomyelocele, split cord malformations, dermal sinus tracts, dermoids, and cystoceles.

Transforming Growth Factor-Beta.  A family of proteins instrumental in the processes of bone and cartilage formation, skeletal development and homeostasis.  Abnormalities in these proteins have been associated with progression of various disease states.

Transforming Growth Factor-Beta.  A family of proteins instrumental in the processes of bone and cartilage formation, skeletal development and homeostasis.  Abnormalities in these proteins have been associated with progression of various disease states.

Transforming growth factor beta 1 – A secreted protein (cytokine) that performs many functions including control of growth, differentiation, proliferation, and the death of cells in the human body.

Transforming growth factor-beta 2 – a cytokine that has a vital role during embryonic development

Transient ischemic attack – commonly refers to temporary insufficiency in blood supply to the brain resulting in a reversible neurological deficit. The deficit resolves a short time after resolution of the ischemia.

Thrombolysis in Cerebral Infarction. Name for a scale used to grade the effectiveness of treatment of clotted cerebral blood vessel in the setting of a stroke.  The scale runs from 0 (no perfusion) to 3 (complete perfusion).

A MRI technique for flow within blood vessels.

The time taken to reach peak concentration after the administration of a contrast agent in a tissue volume being imaged sequentially (such as evaluating how long it takes for maximum enhancement of a tissue seen on MR T2-weighted images after administrating gadolinium).