PNS Overview Flashcards
What structure of a neuron conducts APs away from the cell body?
Axon
What is the function of dendrites?
Communicate with adjacent neurons
The myelin sheath surrounding the axon does what?
Ensures fast conduction of action potentials
What produces the myelin sheath in the PNS?
Schwann cells
What are the two main types of neurons?
Multipolar
Unipolar
A multipolar neuron contains two or more what?
Dendrites
What is a nerve?
A collection of axons bundled together and cased within connective tissue
What cranial nerves arise from the forebrain?
CNs I and II
What cranial nerves arise from the midbrain?
CNs III and IV
What cranial nerve arises from the pons?
CN V
Where do cranial nerves VI, VII and VIII arise from?
Junction between pons and medulla
What cranial nerves arise from the medulla?
CNs IX, X and XII
Why is the accessory nerve not considered a true cranial nerve?
As it arises from the spinal cord
Within what structure is a spinal nerve only found?
Intervertebral foramina
What does a spinal nerve branch into?
Anterior and posterior rami
