Peripheral and Central Nervous System Graphic Organizer
Peripheral Nervous System
Central Nervous System
The peripheral nervous system is made up of two parts the parasympathetic and
The central nervous system is made up of the
sympathetic nervous systems. The PNS is divided into two sections: an Autonomic
brain and the spine.
Division, , and a Somatic Division, which controls striated muscles (voluntary), which are the
skeletal muscles.
Somatic :
Send sensory information to the
central nervous system AND
motor nerve fibers that project to
skeletal muscle.
Autonomic: which controls smooth muscles
(involuntary), such as the stomach and heart
Brain: The brain is the main data center of the
body, consisting of the cerebrum (which regulates
higher-level functioning such as thought) and
Sympathetic:
Parasympathetic:
“Fight or Flight”
“Digest and Rest”
the cerebellum (which maintains coordination).
Spinal Cord: A thick, whitish cord of nerve tissue
that is a major part of the central nervous system.
It extends from the brain stem through the spine,
with nerves branching off to various parts of the
body.
Function:
The cell body is located in either the
brain or spinal cord and projects
directly to a skeletal muscle
Example:
The muscles we have control
Function:
◦ Diverts energy away from
sustaining activities
◦ Instead, mobilizes the
delivery of oxygen
(via the blood) to the
extremities and brain
◦
Increases
responsiveness
Function:
Function:
◦ Maintains bodily functions
such as digestion and
blood flow at a
balanced level
◦
Maintains
homeostasis
The brain communicates its behavior to the PNS by
way of the spinal cord. In cases of very quick
reflexes, such as pain response, the PNS-spinal cordPNS pathway is invoked without first processing
information in the brain (e.g., knee jerk response).
Example:
Example:
Example:
Can accelerate heart rate, widen
bronchial passages, decrease
Rest and Digest
Pupil constriction, saliva
The CNS gets to decide what muscles fire, how
strong and fast they are, how far they will elongate,
over. Movement of any muscle
you can physically operate.
motility of the large intestine,
constrict blood vessels, increase
peristalsis in the esophagus,
perspiration (sweating), and
raise blood pressure.
production increased, mucus
production increased, heart rate
and force decreased, digestion
increased. Save energy
what motor patterns and postures you adopt, and
whether you will experience pain – in short,
everything that matters.