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The thecal sac is the covering for the spinal cord. This can be seen on an MRI. Impingement means that something is pressing on it.
Ventral means in front. Thecal sac means the sac that contain the spinal cord and cerebro spinal fluid. Effacement of the ventral thecal sac means pressure is upon the front of the sac (producing a flattening effect) most likely from a disc protrusion. Foramen means hole (where the nerve comes out of from the spinal cord). Stenosis means narrowing (usually from bony degeneration or disc herniation/protrusion/or bulge). Left foraminal stenosis means narrowing of the passageway where the nerve comes through.
wide herniation that is larger at center mid-line pushing the disc out and beginning to but not yet touch or push on the thecal sac.
They are produced in the anterior pituitary and act mostly notably on the uterus
Epidermal means pertaining to upon the surface of the skin.
The Color of stars depends upon their surface temperature.
No. Only if you get sat upon.
It depends upon the surface. I have used Mr Clean Magic Erasers to remove ink from counter tops and such.
The surface is the ground upon which the medium is applied. If you are painting with oils, you are likely using stretched canvas or masonite board as a surface. If you are drawing in pastels, your surface may be Canson paper.
Emulsification of fats is necessary because a fat globule has large surface area for enzymes to act upon it. Emulsification reduces the surface area and then more enzymes can act upon it and thus can produce more energy.
An adsorber is a material, particularly a solid material, capable of adsorption - accumulation on a surface.
A prayer kneeler is a piece of furniture that typically consists of a low surface for kneeling upon during prayer or meditation. It can also be referred to as a prie-dieu.