The transmission of information along neurons is electrochemical in nature.
Resting potential is the electrical potential across the neuron membrane.
Action potential is the change in the electrical potential of a neuron membrane, when it is stimulated, resulting in the transmission of an electrical impulse.
The series of neurons used to transmit information through the human nervous system is called a pathway.
The general senses are pain, touch, temperature and proprioception (body sense).
The general sensory pathway involves three neurons:
the sensory neuron
the interneuron in the spinal cord or brainstem
the neuron which projects through the cerebrum to the postcentral gyrus
The pyramidal motor pathway consists of the following steps:
the axons of the upper motor neurons descend from the cerebral motor cortex
at the bottom of the medulla these neurons cross over to the opposite side of the spinal cord
they then descend to synapse with a motor neuron in the appropriate segmental nerve
The human nervous system can be thought of as a series of levels. Each level is more complex than the level just below.
The cerebrum is at the highest level, the brainstem and cerebellum are at intermediate levels and the spinal cord is at the lowest level.
Each of the cerebral hemispheres tend to be dominant over the other for certain areas.
Memory is the faculty which enables people to store and retrieve facts, sensations, impressions and ideas.
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