CSF Flashcards
It begins to close just before birth in full-term newborns and is frequently seen in brain images [computed tomographic (CT) scans and magnetic resonance imaging (MRI)] in neonates.
Cavum septum pellucidum
Posterior extension of the cavum septum pellucidum above the fornix and posterior to the foramen of Monro constitutes the______________
cavum vergae (sixth ventricle),
The __________ (interventricular cavum) is a triangular cavity located rostral to the superior (quadrigeminal) cistern below the fornix and above the thalamus and the roof of the third ventricle
cavum veli interpositi
The ___________ communicates with the subarachnoid space, in contrast to the ____________, which communicates with the ventricle.
cavum veli interpositi
cavum vergae
This characteristic bulge of the caudate nucleus into the lateral wall disappears in degenerative diseases of the brain involving the caudate nucleus such as in________
Huntington’s chorea
The ________is the most expanded subdivision of the ventricle and the site of early ventricular enlargement in degenerative diseases of the brain.
atrium
_________extends from the atrium backward toward the occipital pole. It is the most variable subdivision in shape and size, with the left usually larger than the right, and may be rudimentary or altogether absent.
occipital (posterior) horn
Recesses of the 3rd ventricle
pineal (suprapineal) recess above the posterior commissure,
the optic recess above the optic chiasma,
and the infundibular recess into the infundibulum
Where is choroid distributed in the vent system
It is distributed in the body, trigone, and inferior horn of the lateral ventricle, foramen of Monro, roof of the third ventricle, and posterior part of the roof of the fourth ventricle
extraventricular sites of production of csf
(cerebral pial surface, cerebral extracellular space, perineural space, etc).
Almost total cessation of CSF formation from the choroid plexus may result following vasoconstriction induced by________during hyperventilation
low PCO2
_________ an ATPase inhibitor, can produce effects similar to those of Diamox in csf production
Ouabain,
Three factors seem to facilitate CSF circulation.
Drift.
Oscillation.with a to-and-fro movement the amplitude of which increases as the fluid approaches the fourth ventricle.
Pulsatile Movement.These pulsatile oscillations assume an upward and downward movement in the fourth ventricle and basal cisterns.
Arachnoid granulations are not discernible in the newborn. They become evident by the _________ and become numerous and widely disseminated by the _________
eighteenth month
third or fourth year of life
Components of the CSF
Water.
Protein. 15 -45 (15: Vent, 45:lumbar sas
CHO: Glucose value is slightly higher (75 mg/dl) in ventricular fluid than in lumbar subarachnoid space fluid (60 mg/dl)
Electrolytes: Sodium and potassium constitute the major cations, whereas chloride constitutes the major anion.
Peptides: luteinizing hormone–releasing factor, cholecystokinin, angiotensin II, substance P, somatostatin, thyroid hormone–releasing hormone, oxytocin, and vasopressin.
