The Components Of The Control And Communication Network Flashcards
Central nervous system
Sensory inputs into CNS givens motor outputs
Motor outputs can be somatic nervous system (you control) or autonomic nervous system (like breathing )
CCN components
Central nervous system -brain and spinal cord
The peripheral nervous system - somatic nervous system and autonomic nervous system
Endocrine system
Local support and defence system
Nervous system
Sensory neurons synapse at the spinal cord but not all information goes immediately to Brain
Ex reflex arc
5 major cell types
Neurons Oligodendrocytes and Schwann cells Astrocytes Micro glia Ependymal cells Last 4 classified as glial or non neuronal cells
Neurons
- unidirectional info flow
- built for speed (myelin sheath Insulates axon)
- specific neurotransmitter for specific target cells
- Either excitatory or inhibitory ( based on an overall or summation effect of all inputs)
- diverge coverage and form networking ( age 10 lot of remodelling of brain network network) -develop new synapse-get rid of unused
Oligodendrocytes and Schwann cells
Cells that produce myelin
Oligadendrocytes can span multiple axons ( each cell can support up to 30 myelin rolls)
Astrocytes microglia and Ependymal cells
Astrocytes- stellate morphology important for communication
microglia- mobile macrophage like immune cells
Ependymal cells - line the ventricles to form a Barrie’s produces cerebrospinal fluid
Astrocytes super network
Main function
Coordinate overall function of BBB and provide nutrients to feed neurons
Coordinates the function of the ventricle epithelium
Coordinates function at the action potential jump
Serve as super hubs for neural networks
The blood brain barrier
Tight control over what gets through Very good protection against most bacteria and toxins What gets through Small lipid soluble compounds Caffeine alcohol
