Tarsal bones - The bones between the heel and forefoot of the foot.

Temporary Prosthesis - An unfinished artificial limb designed to replace the amputated limb. Fabricated and fit soon after surgery, to be worn while the residual limb is healing and to accelerate the rehabilitation process.

Terminal Device - The portion of an upper extremity prosthesis that replaces the hand, referred to as a hook or prosthetic hand.

Test Socket - A socket, usually transparent, which is used to evaluate the comfort and fit of the socket before the fabrication of the temporary or permanent prosthesis. Also, known as test socket or evaluation interface.

Thoracic Curve - A scoliosis curve of the spine with an apex of the curve between the second and eleventh thoracic vertebrae.

Thoracic Vertebra - The 12 spinal vertebra to which ribs are attached.

Thoracolumbar Curve - A scoliosis curve of the spine with its apex at the twelfth thoracic or first lumbar vertebra.

Thoracolumbosacral Orthosis - (TLSO) An orthosis (brace) which is prescribed to support or control the spine from the pelvis to armpits.

Tibia - Located between the knee and ankle on the medial side (inside edge of the leg). Also known as the shin bone.

TLSO - See also, Thoracolumbosacral Orthosis.

Torso - The chest and abdominal area, also known as the trunk.

Total contact - Distribution of pressure in a prosthetic socket to reduce pressure on the residual limb.

Transfemoral - Amputation above the knee.

Transhumeral - Amputation above the elbow.

Transmetasatal - A partial foot amputation through the metatarsal bones.

Transradial - Amputation below the elbow.

Transtibial - Amputation below the knee.

Traumatic amputation - The surgical removal of a limb as a result of an accident or injury.