Transcript Peripheral Nervous System PowerPoint

WHS AP Psychology
Unit 4: Biological Psychology
Essential Task 4-5b:Describe the subdivisions
and functions of the peripheral nervous system:
A. Somatic Nervous System
B. Autonomic Nervous System
– i. Sympathetic Nervous System (Fight or Flight)
– ii. Parasympathetic Nervous System (Rest and Digest)
Evolutionary
Endocrine
System
Building
Blocks
Biological
Psychology
Genetics
Neurons
Nervous
System
Central
Nervous
System
Peripheral
Nervous
System
Motor
Brain
Brain
Imaging
Spinal
Cord
Autonomic
Sympathetic
Neurotransmitters
Sensory
Somatic
Parasympathetic
We are
here
Essential
Task
4-5b:
Outline
A. Somatic Nervous System
B. Autonomic Nervous System
– i. Sympathetic Nervous System (Fight or Flight)
– ii. Parasympathetic Nervous System (Rest and
Digest)
The Somatic Nervous System
• Consists of neurons that communicate
between the body and the brain
• Motor Neurons
– Neurons that carry messages from the
spinal cord or brain to muscles and
glands
The Autonomic Nervous System
• Sympathetic division
– Most active when you
are angry, afraid, or
aroused
– Increases heart rate
and breathing
– Stops digestion
– “Fight-or-flight”
SNS = Evolutionary Byproduct
Scared Bros
Hold me!
Congo line of fear
Swag gone scared
Even Flannel Bros have an SNS
response
Connector Bros
I’m not really here to protect you.
( I just happen to be in front)
Fight, Flight and Freeze
The better to see you with my dear
The Autonomic Nervous System
• Parasympathetic
division
– Calms body
– Produces effects
opposite to those of
the sympathetic
division
– Reduces heart rate and
breathing
– Restores digestion
– “Rest and Digest”
The Hypothalamus Has Central
Control of the ANS
• When someone experiences a stressful event, the
amygdala, an area of the brain that contributes to
emotional processing, sends a distress signal to the
hypothalamus. This area of the brain functions like a
command center, communicating with the rest of the
body through the nervous system so that the person has
the energy to fight or flee.
• The hypothalamus is involved in the coordination of ANS
responses
• One section of the hypothalamus seems to control many
of the "fight or flight" responses; another section favors
"rest and digest" activities