Term
| What are the primary functions of cerebrospinal fluid? |
|
Definition
| Keep brain tissue buoyant, deliver nutrients/hormones/pressure and remove waste, compensate for changes in intracranial blood volume |
|
|
Term
| What is the developmental origin of the ventricular spaces within the brain? |
|
Definition
| Expansions of the lumen of the neural tube |
|
|
Term
| What are the primary structures adjacent to the lateral ventricles? |
|
Definition
| Caudate nucleus, corpus callosum, septum pellucidum, fornix, and thalamus in the anterior horn of the body |
|
|
Term
| What are the divisions of the lateral ventricles? |
|
Definition
| Anterior horn, body, posterior horn, inferior horn, atrium |
|
|
Term
| What part of the brain does the anterior horn of the lateral ventricles extend into? |
|
Definition
|
|
Term
| What is the location of the body of the lateral ventricles within the brain? |
|
Definition
| Under the corpus callosum and over the thalamus |
|
|
Term
| What part of the brain does the posterior horn of the lateral ventricles extend into? |
|
Definition
|
|
Term
| What part of the brain does the inferior horn of the lateral ventricles extend into? |
|
Definition
|
|
Term
| The junction of the body and the posterior and inferior horns of the lateral ventricles is known as what? |
|
Definition
|
|
Term
| What separates the lateral ventricles in the midline over the thalamus? |
|
Definition
|
|
Term
| The septum pellucidum separates the lateral ventricles over the midline and attaches to what structures? |
|
Definition
| Corpus callosum and the fornix |
|
|
Term
| What forms the floor of the body of the lateral ventricles? |
|
Definition
|
|
Term
| What important structures help compose the inferior horn of the lateral ventricles? |
|
Definition
| Hippocampus forms the medial wall, amygdala forms its tip |
|
|
Term
| What recesses in the 3rd ventricle are used as landmarks for imaging? |
|
Definition
| Supra optic recess above the optic chiasm, the infundibular recess, the pineal recess, and the suprapineal recesss |
|
|
Term
| What forms the anterior (rostral) wall of the third ventricle? |
|
Definition
| Anterior commissure and the lamina terminalis (point of closure of the anterior neuropore) |
|
|
Term
| The apex of the fourth ventricle extends into what structure? |
|
Definition
|
|
Term
| The two lateral recesses of the fourth ventricle extend out over of what structure? Where do they end? |
|
Definition
| The medulla, ends in the foramina Luscka at the cerebellopontine angle |
|
|
Term
| What connects the fourth ventricle and the cisterna magna? |
|
Definition
| Foramen of Magendie in the midline of the fourth ventricle |
|
|
Term
| What forms the roof of the fourth ventricle? |
|
Definition
| Superior cerebellar peduncles and the anterior medullary velum |
|
|
Term
| The fourth ventricle is continuous with what structure? |
|
Definition
| central canal of the spinal cord |
|
|
Term
| What secretes the cerebrospinal fluid that fills the ventricles? |
|
Definition
|
|
Term
| What is the direction of cerebrospinal fluid flow? |
|
Definition
| Choroid plexus -> lateral ventricles -> 3rd ventricle -> cerebral aqueduct -> fourth ventricle -> subarachnoid space over the brain and spinal cord |
|
|
Term
| What are potential sites of obstruction of cerebrospinal fluid flow? |
|
Definition
| Interventricular foramina and cerebral aqueduct |
|
|
Term
| What is the name of the junction between the lateral ventricles and the third ventricle? |
|
Definition
| Interventricular foramen of Monro |
|
|
Term
| What provides communication between the 3rd and fourth ventricles? |
|
Definition
|
|
Term
| What are the pathways for cerebrospinal fluid out of the internal ventricular system? |
|
Definition
| Foramena of Luschka and foramen of Magendie within the fourth ventricle |
|
|
Term
| What are the naturally expanded regions of the subarachnoid space that contain cerebrospinal fluid, arteries, veins, and occasionally cranial roots? |
|
Definition
|
|
Term
| Subarachnoid cisterns are usually named according to what? |
|
Definition
|
|
Term
| What is the developmental origin of the choroid plexus? |
|
Definition
| Forms as an outgrowth of the tela choroidea in the lateral, 3rd, and fourth ventricles |
|
|
Term
| What is formed by the choroid plexus in the atrium of the lateral ventricles? |
|
Definition
| Glomus, may contain calcifications that show up on CT scans along with the pineal |
|
|
Term
| What cells regulate the composition of the cerebrospinal fluid via the blood-CSF barrier? |
|
Definition
|
|
Term
| What is actively transported into ventricles by choroid epithelium? |
|
Definition
| Sodium and chloride, water follow passively |
|
|
Term
| How does cerebrospinal fluid composition compare with blood plasma? |
|
Definition
| higher sodium, chloride, and magnesium, lower potassium, calcium, glucose, protines, and pH |
|
|
