Lecture 7 - The Nervous System Flashcards
What is the CNS comprised of?
the brain and spinal cord
what is the PNS comprised of?
The nerves connecting the CNS to the body and includes a number of neuronal clusters (ganglia) at specific locations along these peripheral nerves
What are some of the cells of the CNS?
astrocyte, capillary, microglia, oligodendrocyte, neuron
what are the major parts of the CNS?
cerebrum
diencephalon
brain stem
cerebullum
central canal
spinal cord
pituitary gland
What are the three types of Dural folds?
a. Falx cerebri
b. Tentorium cerebelli
c. Falx cerebelli
The CNS is wrapped in 3 membranes known as meninges, what are these three membranes called?
Dura mater, arachnoid mater, pia mater
Where Is CSF found?
Inside the brain (ventricles) and surround sthe brain and spinal cords
What happens if the CSF doesn’t return to the proper circulation?
a. A catheter is required to drain CSF from the ventricles into the peritoneal cavity to treat hydrocephalus
b. A tube is inserted into lateral ventricle through ole in skull
c. Drainage tube, usually introduced into peritoneal cavity, with extra length to allow for growth of child
Where are most primary cortices located?
Around the deepest sulci/fissues
What is the central sulcus surrounded by?
Primary somatomotor and somatosensory cortices
What is the lateral tissue surrounded by?
Primary auditory and gustatory cortices
What is the calcarine sulcus surround by?
Primary visual cortex
Where is the brainstem located?
Between the diencephalon (interbrain) and the spinal cord
What are the three major divisions of the brain stem?
a. The midbrain (mesencephalon)
b. Pons (“the bridge”)
c. Medulla oblongata (= myelencephalon = bulbus)
What are the two types of glial cells that provide insulation to nerve axons?
a. Oligodendrocytes in CNS
b. Schwann cells in PNS
