What is the overview of the nervous system?
The brain and the spinal cord make up the central nervous system. The nervous system is the most complex and highly organized body system. It receives information from the sensory organs via nerves, transmits the information through the spinal cord, and processes it in the brain.
What are the stages of the nervous system?
Later stages of nervous system development include neural stem cell differentiation into neurons and glial cells, neuron migration, axon outgrowth, and synapse formation and remodeling.
- Axon Guidance and Neuron Migration.
- Morphogens.
- Neural Crest Cell Markers.
- Neural Stem Cells.
What does the P stand for in PNS?
Reviewed on 3/29/2021. Nervous system, peripheral (PNS): That portion of the nervous system that is outside the brain and spinal cord. The peripheral nervous system (PNS) is one of the two major divisions of the nervous system.
What is the function of the PNS?
The PNS has three basic functions: (1) conveying motor commands to all voluntary striated muscles in the body; (2) carrying sensory information about the external world and the body to the brain and spinal cord (except visual information: the optic nerves, which convey information from the retina to the brain, are in …
What are the four stages of nervous system development?
Neuronal Development
- Stage 1: Neurogenesis.
- Stage 2: Cell Migration.
- Stage 3: Differentiation.
- Stage 4: Outgrowth.
What is the correct order of events during the development of the nervous system?
First, cells must migrate to their final position, second, these cells must be specified to be neurons, third, the neurons must make connections with their targets, and fourth, the neurons refine their synaptic connections.
What do PNS and CNS comprise of?
Our nervous system is divided in two components: the central nervous system (CNS), which includes the brain and spinal cord, and the peripheral nervous system (PNS), which encompasses nerves outside the brain and spinal cord.
What are the 3 divisions of the PNS?
The autonomic nervous system is divided into three parts: the sympathetic nervous system, the parasympathetic nervous system and the enteric nervous system. The autonomic nervous system controls smooth muscle of the viscera (internal organs) and glands.