Nervous System

Neuron

Neuron

Neurons

Schwann cells and the Oligodendroglia. 

Myelin Sheath

A Baby’s Brain https://www.youtube.com/watch?v=MS5HUDVNbGs

Electrical Signal down axon Resting State https://www.youtube.com/watch?v=fHRC8SlLcH0

Electrical Impulse Action Potential (1) https://www.youtube.com/watch?v=fHRC8SlLcH0 Action Potential (2) https://www.youtube.com/watch?v=iBDXOt_uHTQ

Types of Impulse Transmission Continuous Conduction

Types of Impulse Transmission  Saltatory Conduction

Types of Impulse Transmission

Synapse Axon terminal Axon of transmitting neuron Vesicles Synaptic cleft Action potential arrives Synapse Axon of transmitting neuron Receiving neuron

Neurotransmitters Transmitting neuron Axon terminal Vesicles Synaptic cleft Action potential arrives Synapse Axon of transmitting neuron Receiving neuron Vesicle fuses with plasma membrane Ion channels Transmitting neuron

Neurotransmitters

Neural Networks Neural networks - formed when several neurons link together to form a pathway.  critical to the functioning of the body.  different types of neural networks. examples: divergent circuit, a single neuron sends impulses to several other neurons.  This allows information to be disseminated to many areas simultaneously to allow a coordination of activities. convergent circuit, several neurons send information to a single neuron.  This type of circuit will allow information from a number of sources to be processed in one central location. reverberating circuit cycles the impulse back through the neural network.  This continues to restimulate the neurons near the beginning of the neural network and keeps the information cycling through the network.  This type of circuit is involved in short-term memory.