Mindblown: a blog about philosophy.
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Brain graft
An experimental technique in which brain cells are transplanted into the brain.
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Axillofemoral bypass graft
The surgical establishment of a connector between the axillary artery and the common femoral arteries. A synthetic artery graft is used and implanted subcutaneously. This technique is used in treating patients with insufficient blood flow to the legs (peripheral vascular disease).
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Avascular graft
A graft in which vascular infiltration does not occur.
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Autologous graft
A graft taken from another part of the patient’s body.
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Allogeneic graft
A graft from a genetically nonidentical donor of the same species as the recipient.
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Graefe’s sign
Failure of the upper lid to follow a downward movement of the eyeball when the patient changes is or her vision from looking up to looking down. This finding, referred to colloquially as “lid lag,” is seen in Graves’ disease (hyperthyroidism) with exophthalmos. In Graves’ disease, the upper eyelid lags behind the downward rotation of…
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Graduated tenotomy
Partial surgical division of a tendon of an eye muscle.
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Pressure gradient
The difference in hydrostatic pressure on either side of a membrane. As the difference in pressures rises, filtration increases from the area of high pressure to the area of low pressure.
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Concentration gradient
The difference in the amounts of a substance on either side of a membrane or in two areas of a biological system. Substances diffuse down a concentration gradient, from the area of higher concentration to lower concentration.
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Axial gradient
A gradient of physiological or metabolic activity exhibited by embryos and many adult animals, the principal one of which follows the main axis of the body, being highest at the anterior end and lowest at the posterior end.
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