Nerve tissues II Flashcards
What is the function of the choroid plexus
invaginated folds of Pia mater containing tufts of fenestrated capillaries and covered by simple cuboidal ependymal cells
Produces CSF in the lateral ventricles.
What is this structure
choroid plexus
What is the general organization of white matter?
- Found in the inner core of brain tissue
- Axons travel to parts of the CNS
What is the general organization of the gray matter?
- Found in the outer layer
- cell bodies arranged in layers
- Nuclei-islands of grey matter that project into white matter tissue
What structure is this?
White Matter
What is this structure?
Gray matter
Describe the general structure of the cerebral cortex.
- Has 6 grey matter layers
- contains afferent and efferent fibers
- Main cell type is Pyramidal cell
- Layer 3 has large pyramidal cells
What is gray matter layer I
Molecular level
What is gray matter layer II
External granular layer
What is gray matter layer III
External pyramidal cell layer
What is gray matter layer IV
Internal granular layer
What is gray matter layer V
- Ganglionic layer
- Internal Pyramidal cells
What is gray matter layer VI
Multiform cell layer
What is this structure?
Cerebral cortex
H&E stain
What is this structure
Cerebral cortex
luxol blue stain
What is Neuropil?
- Meshwork of tissue in grey matter excluding the cell bodies
- Comprised of dendritic and axonal processes and central glial cells
Describe the structure of the cerebellar cortex
- Grey Matter
- Outer portion
- cell bodies arranged in layers
- White matter
- Inner core
- axon travel to other parts of the CNS
- Axon forms tracts
Identify this structure
Cerebellar cortex
Identify the specified structure
Purkinje Fibers
What is the specified structure?
Purkinje Cells
General structure of gray and white matter in the spinal cord.
White matter on the outside, Gray matter on the inside
The two types of gray matter in the spinal cord?
Dorsal horn and Ventral horn,
Upside down butterfly looking shape
Dura Mater
Outer covering
Dense connective Tissue
Vascular
innervated
Arachnoid Mater
Loose connective tissue
lined with simple squamous epithelium
Projects into the sinus to dain CSF into the Bloodstream
AVASCULAR
Pia mater
Vascular loose connective tissue
lies directly on brain and spinal cord
Interact with epindymal cells to form choroid plexus
Overview of Meninges(dura,aracnoid,and pia)
Histology Overview of Meninges(dura,aracnoid,and pia)
Histology(H&E) Overview of Meninges(dura,aracnoid,and pia)
What is an Alpha Motor/Golgi nueron and where is it located?
Large cell with pale staining large nuclei
abundant nissl bodies
embedded in neuropil
- Located in the ventral horn
what is the structure that the arrow is pointing to?
Alpha motor neurons
What is the function of Granule cells?
They carry excitatory signals to the cerebellum.
Function of the blood brain barrier
Protect the CNS from imbalances in surrounding environment as well as electrolytes, hormones, metabolites disturbances
Organization of Blood brain barrier
- Continuous with capillaries
- complex tight junctions between endothelial cells
- continous basal lamina
- no fenestrations(openings) in basal lamina
- Foot process of Astrocytes
