subarachnoid space


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Related to subarachnoid space: Subarachnoid hemorrhage

space

 [spās]
1. a delimited area.
2. an actual or potential cavity of the body.
3. the areas of the universe beyond the earth and its atmosphere. adj., adj spa´tial.
danger space a subdivision of the retropharyngeal space, extending from the base of the skull to the level of the diaphragm; so called because it provides a route by which infection of the pharynx can spread to the mediastinum.
dead space see dead space.
epidural space the space between the dura mater and the lining of the spinal canal.
intercostal space the space between two adjacent ribs.
interpleural space mediastinum.
interproximal space (interproximate space) the space between the proximal surfaces of adjoining teeth; called also proximal or proximate space.
intervillous space the space of the placenta into which the chorionic villi project and through which the maternal blood circulates.
lymph s's open spaces filled with lymph in connective or other tissue, especially in the brain and meninges.
Meckel's space a recess in the dura mater that lodges the trigeminal ganglion.
mediastinal space mediastinum.
medullary space the central cavity and the intervals between the trabeculae of bone that contain the marrow.
palmar space a large fascial space in the hand, divided by a fibrous septum into a midpalmar and a thenar space.
parasinoidal s's spaces in the dura mater along the superior sagittal sinus which receive the venous blood.
perivascular space a lymph space within the walls of an artery.
plantar space a fascial space on the sole of the foot, divided by septa into the lateral, middle, and median plantar spaces.
pneumatic space a portion of bone occupied by air-containing cells, especially the spaces constituting the paranasal sinuses.
proximal space (proximate space) interproximal space.
retroperitoneal space the space between the peritoneum and the posterior abdominal wall.
retropharyngeal space the space behind the pharynx, containing areolar tissue.
subarachnoid space the space between the arachnoid and the pia mater, containing cerebrospinal fluid.
subdural space a narrow fluid-containing space, often only a potential space, between the dura mater and the arachnoid.
subphrenic space the space between the diaphragm and underlying organs.
subumbilical space somewhat triangular space in the body cavity beneath the umbilicus.
Tenon's space a lymph space between the sclera and Tenon's capsule.

sub·a·rach·noid space

[TA]
the space between the arachnoidea and pia mater, traversed by delicate fibrous trabeculae and filled with cerebrospinal fluid. Because the pia mater immediately adheres to the surface of the brain and spinal cord, the space is greatly widened wherever the brain surface exhibits a deep depression (for example, between the cerebellum and medulla); such widenings are called cisternae. The large blood vessels supplying the brain and spinal cord lie in the subarachnoid space.

subarachnoid space

n.
The space between the arachnoid membrane and pia mater that is filled with cerebrospinal fluid and contains the large blood vessels that supply the brain and spinal cord.

sub·a·rach·noid space

(sŭb'ă-rak'noyd spās) [TA]
The area between the arachnoidea and pia mater, traversed by delicate, fibrous trabeculae and filled with cerebrospinal fluid. Because the pia mater immediately adheres to the surface of the brain and spinal cord, the space is greatly widened wherever the brain surface exhibits a deep depression (for example, between the cerebellum and medulla); such widenings are called cisterns. The large blood vessels supplying the brain and spinal cord lie in the subarachnoid space.

subarachnoid space

The space between the PIA MATER and the arachnoid mater, occasioned by the fact that the pia, the innermost layer of the meninges, closely invests the surface of the brain while the arachnoid, external to it, bridges over the grooves. The subarachnoid space contains blood vessels.

Subarachnoid space

The space between two membranes surrounding the brain, the arachnoid and pia mater.
References in periodicals archive ?
1: empty sella, 2: flattening of the posterior aspect of the globe, 3: tortuous optic nerve, and 4: distention of the perioptic subarachnoid space.
FLAIR images demonstrate gadolinium enhancement in the subarachnoid space in the left MCA territory (arrows).
The distance from the skin to the epidural and subarachnoid spaces in parturients scheduled for caesarian section.
The clinical relevance of these soft tissue connections to dural generated pain mechanisms, cervicocephalic headaches, subarachnoid space and cord impingement make this an area of great interest.
Detection of dural penetration will prevent inserting the needle all the way through the subarachnoid space and contacting the vertebral body.
(20) MRI is mostly performed to exclude other intracranial pathologies which may increase ICR However, MRI may exhibit radiographic evidence of increased ICP, which includes slit ventricle, empty sella, flattening of the posterior sclera, distension of the perioptic subarachnoid space, tortuous optic nerve, protrusion and enhancement of the optic disc.
* If the vessel lies in the subarachnoid space, the haemorrhage is referred to as a subarachnoid haemorrhage (SAH).
Artifact can be generated by aneurysm clips or residual air from recent surgery, interference due to the presence of methemoglobin in the subarachnoid space, high fat concentrations, or tissue with a naturally high T1 signal [1].
According to the "ball valve" hypothesis, a one-way valve between arachnoid cysts and subarachnoid space might lead to its expansion, very rarely triggering a significantly serious neurological condition.
The upper level of the contrast medium in the subarachnoid space was observed to rise progressively when 5 ml aliquots of normal saline were injected into the epidural space.