Meninges and CSF Flashcards
(49 cards)
Meninges (describe)
Comprise three connective tissue membranes that invest the spinal cord and brain, which are the pia mater, the arachnoid, and the dura mater
Pia mater (describe)
a delicate, vascular layer of connective tissue
Pia mater (structure)
covers the surface of the brain and spinal cord, connected to the arachnoid by arachnoid trabeculae
Denticulate ligaments (describe)
two lateral flattened bands of pial tissue, adhre to the spinal dura mater with 21 pair of attachments
Filum terminale (describe)
extension of the pia mater
Arachnoid (structure)
delicate, nonvascular connective tissue membrane between the dura and the pia mater and has the arachnoid villi
Dura mater (structure)
outer layer of the meninges, consisting of dense connective tssue, divided into periosteal layer and a meningeal layer
Meningeal spaces (structure)
spinal epidural space, cranial epidural space, subdural space, subarachnoid space, subarachnoid cisterns
Spinal epidural space (location)
located between the spinal dura mater and the vertebral periosteum
Spinal epidural space (function)
can be injected with a local anesthetic to produce a paravertebral nerve block
Cranial epidural space (describe)
contains the meningeal arteries and veins
Subdural space (function)
intracranially transmits cerebral ceins to the venous lacunae of the superior sugittal sinus
Subarachnoid space (location)
located between the pia mater and the arachnoid
Subarachnoid space (function)
contains CSF
Subarachnoid cisterns (function)
dilations of the subarachnoid space, which contain CSF
Brain ventricles (describe)
lateral ventricles, third ventricles, cerebral aqueduct, fourth ventricle
Subarachnoid cisterns (describe)
Cerebellopontine angle cistern, cerebellomedullary cistern, Ambient cistern, superior cistern
Cerebellopontine angle cistern (function)
Receives CSF from the fourth venticle via the lateral foramina
Cerebellomedullary cistern (describe)
Located in the midline between the cerebellum and the medulla
Cerebellomedullary cistern (function)
Receives CSF from the fourth ventricle via the median foramen and can be tapped for CSF
Ambient cistern (function)
Interconnects the superior and interpeduncular cistern
Ambient cistern (describe)
Contains the trochlear nerve CN IV
Superior cistern (describe)
Overlies the midbrain tectum
Ventricles (describe)
Lined with ependyma and contain CSF, contain choroid plexus. Lateral ventricles, third ventricle, cerebral aqueduct, fourth ventricle