Ventricles and CFS Flashcards
Ventricular System
Interconnected network of cavities filled with cerebral spinal fluid
The ventricular system is composed of?
2 lateral ventricles
1 third ventricle
1 fourth ventricle
The ventricular system is lined by?
Ependymal cells - a type of microglia
The lateral ventricles are separated medially by the?
Septum pellucidum
The roof of the lateral ventricle is the?
Corpus callosum
Atrium/Trigone
A triangular cavity where the body, posterior, and inferior horns communicate within the lateral ventricles
Interventricular Foramen of Monroe
The communication between lateral ventricles and the third ventricle
Third ventricle
The middle space between the thalami
The roof of the third ventricle
The ependyma - stretches across the upper limits of the two thalami
The floor of the third ventricle
Formed partially by the infundibulum, which attaches to the pituitary gland and the optic chiasm
The pineal wall is responsible for?
Circadian rhythms
What are the four third ventricle recesses?
Infundibular recess
Supraoptic recess
Pineal recess
Suprapineal recess
Cerebral Aquaduct
Located in the midbrain between the tegmentum and the tectum, connects the third and fourth ventricles
The inferior portion of the cavity (fourth ventricle) is called the ______, which connects to the central canal of the spinal cord
Obex
What is the posterior boundary of the fourth venticle?
The cerebellar peduncles and superior and inferior medullary velum
Ependyma
Thin, neuroepithelial lining of the ventricles and central canal of the spinal cord
Choroid Plexus
Richly innervated invagination of pia. Covering or plexus of cuboidal epithelium; which is continuous with the ependymal cells
Purpose of the Choroid Plexus
Produce cerebral spinal fluid, serves as a barrier in the brain seperating the blood from the cerebral spinal fluid, known as the blood-CFS barrier
Functions of Cerebral Spinal Fluid
Provides a cushion to protect the brain/buoyancy. Involved in drainage of cerebral metabolites. Helps regulate cerebral blood flow
Location of Cerebral Spinal Fluid
Subarachnoid space, surrounding the spinal cord, and within the inner ear
Where is CFS the most abundant?
The cranial subarachnoid space
CFS if replaced every ___ hours
8
About _______ ml of CFS is formed each day
500
Cisterns
Compartments within the subarachnoid space where the pia mater and arachnoid membrane are not in close approximation and cerebrospinal fluid forms pools or cisterns
