4 - Nerves Flashcards
a lot of _____ praise from the brainstem
cranial nerves
the brainstem is primarily made up of _____ matter
grey
Structurally, what is the cerebellum?
hindbrain structure attached to the brainstem
Where are unipolar cells found in the NS?
(Rarely found in the CNS)
around the retina
What is a pseudo-unipolar cell and where is it found in the NS?
has a single axonal projection which splits into two
rarely found in the CNS
mainly found in the pain pathway in the PNS
What is a bipolar cell and where is it found in the NS?
two projections - 1 axon and 1 dendrite
rarely found in the CNS
What is a multipolar cell and where is it found in the NS?
numbers projections coming form the cell body - 1 axon and multiple dendrites
very common
have many morphologies
What are the three types of multipolar cells? Where are they found?
Pyramidal, Golgi and Purkinje
Pukinje and Golgi are the GABA neurones found in the cerebellum
Where does an axon originate from?
the soma at the axon hillock
What can axons branch into?
collaterals
Give some characteristics of neurones
- excitable cells
- heterogenous morphology
- non-dividing cells
- 3 parts: soma, axon and dendrites
are dendrites myelinated?
NO
What is neuroglia/glia?
the connective tissue of the nervous system, consisting of several different types of cell associated with neurons
(all other cells of the NS except neurones)
What is the most abundant cll type in the mammalian brain?
astrocytes
What is the main difference between oligodendrocytes and schwann cells?
one oligodendrocyte myelinated many axons
one Schwann cell myelinated one axon segment
oligodendrocytes - in the CNS
schwann cells - in the PNS
