G Glossary of Terms for
Physical Therapy & Sports Medicine

G

Gadolinium MRI:

The chemical gadolinium is injected into the joint being studied so as to enhance the diagnosis image of the structure under investigation.

Gamekeeper's Thumb:

Tear of the ulnar collateral ligament of the metacarpophalangeal joint of the thumb.

Glenohumeral:

The shoulder girdle; consists of the glenoid capsule, head of the humerus and labrum. The type of joint that allows 360-degree motion, a "ball and socket" joint.

Glenoid:

Cavity of the scapula into which the head of the humerus fits to the form the shoulder girdle.

Glucose:

A simple sugar found in the blood, all of carbohydrate and part of fat can be changed by the body into glucose. It is the body's main source of energy; also known as dextrose.

Glycogen:

Stored form of carbohydrate in the liver and muscles. Glycogen is the chief source of stored fuel in the body.

Grade One Injury:

A mild injury in which ligament, tendon, or other musculoskeletal tissue may have been stretched or contused, but not torn or otherwise disrupted.

Grade Two Injury:

A moderate injury when musculoskeletal tissue had been partially, but not totally torn which causes appreciable limitation in function of the injured tissue.

Grade Three Injury:

A severe injury in which tissue has been significantly, and in some cases totally, torn or otherwise disrupted causing a virtual total loss of function.

Groin:

Junction of the thigh and abdomen; location of muscles that rotate, flex and adduct the hip.

Guarding:

Involuntary local reflex ("protective") abdominal muscle contraction in the region of an area of peritonitis (inflamed lining membrane of the potential cavity in the abdomen).

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