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The route of administration is sometimes simply referred to as "intrathecal"; however, the term is also an adjective that refers to something occurring in or introduced into the anatomic space or potential space inside a sheath, most commonly the arachnoid membrane of the brain or spinal cord [1] (under which is the subarachnoid space).
The lumbar cistern is part of the subarachnoid space.It is the space within the thecal sac which extends from below the end of the spinal cord (the conus medularis), typically at the level of the first to second lumbar vertebrae down to tapering of the dura at the level of the second sacral vertebra.
of or pertaining to the veins, venous blood, and the vascular system: Latin vēna, blood-vessel, vein venule, venospasm: ventr(o)-of or pertaining to the belly, the stomach cavities Latin venter, belly, stomach, womb ventrodorsal: ventricul(o)-of or pertaining to the ventricles; any hollow region inside an organ
Pertaining to the lower side (usually of the head). interdorsal Between the dorsal fins. interorbital The space between the orbits. intromittent organ A structure to facilitate sperm transfer in some internally fertilizing species. iris lappet A fleshy flap or lobe-like structure in the eye, short and rounded, simple or multiply branched. isthmus
The parapharyngeal space is shaped like an inverted pyramid. Lateral and inferior to the parapharyngeal space is the carotid sheath, containing the internal carotid artery and cranial nerves IX, X and XI. Behind both the parapharyngeal space and carotid space lies the retropharyngeal space, and deep to this a potential space known as the danger ...
The spinal epidural space spans the length of the spinal cord, from the foramen magnum superiorly to the sacral hiatus inferiorly. [6] Epidural space is the smallest at the cervical region, measuring 1 to 2 mm. At L2 to L3, enlarges until 5 to 6 mm. It then enlarges progressively until lower lumbar and sacral region. [7]
4. Don’t Hover at the Pickup Counter Asking if Every Drink Is Yours. Hanging around anywhere with heavy foot traffic is a stupid idea, but people keep doing it anyway.
The space between these two layers is technically outside of the peritoneal sac, and thus not in the peritoneal cavity. The potential space between these two layers is the peritoneal cavity , filled with a small amount (about 50 mL) of slippery serous fluid that allows the two layers to slide freely over each other.