Action Potential
The name for a nerve impulse transmitted by axons.
What is action potential ?
The most abundant neuroglia in the CNS. They determine capillary permeability.
What are astrocytes?
Neurons only have one of these projections.
What is an axon?
Lobe containing the primary auditory cortex.
What is the temporal lobe?
Damage to this nerve can cause issues with balance.
What is cranial nerve VIII (8) vestibulocochlear nerve?
A value in which any stimulus at or above this level will result in action potential.
What is threshold stimulus?/ What is -55mV?
These have processes that form the myelin sheath around nerve fibers in the CNS.
What are oligodendrocytes?
The receptive regions of the neuron.
What are dendrites? (Also possible: what is the cell body/soma?)
An area found in the frontal lobe and is considered to be a motor speech area.
What is Broca's area?
What is cranial nerve II? What is optic nerve?
When voltage-gated Na+ channels open (inside of cell becomes less negative).
What is depolarization?
These are found in the CNS and often ciliated. They play an active role in moving CSF.
The impulse-generating and conducting region of a neuron.
What is an axon?
This lobe has the gustatory cortex and the vestibular cortex.
What is the insula? (insular lobe)
This cranial nerve elevates the pharynx to aid in swallowing.
What is the glossopharyngeal nerve (cranial nerve IX?
At this stage, the sodium ion channels begin to inactivate and the voltage-gated K+ channels open.
What is repolarization?
These are neuroglia found in the PNS.
What are Schwaan and Satellite cells?
The secretory region of a neuron.
What is an axon terminal?
Insular cortex in charge of visceral perceptions such as "full bladder".
What is the visceral sensory cortex?
The only cranial nerves that go beyond the head and neck regions.
What is cranial nerve X- Vagus nerves?
At this stage, some potassium ion channels remain open and Na+ channels rest.
What is hyperpolarization?
These monitor neuron health and can become macrophages that phagocytize neuronal debris and microorganisms.
What are microglial cells ?
The rough endoplasmic reticulum of a neuron.
What is chromatophilic substance ? (what nissl bodies?)
A lesion in this area can cause the individual to have a type of aphasia in which they produce spoken nonsense or "word salad."
What is Wernicke's area?
This nerve serves the tongue and aids in chewing, swallowing, and speech (articulation).
What is cranial nerve XII- hypoglossal nerve?