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Lecture 2

PSYCH 10 Lecture 2: Psych 10- lecture 2


Department
Psychology
Course Code
PSYCH 10
Professor
Clark
Lecture
2

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Psych 10- Lecture 2
Phineas Gage he was blasting rocks to make theme expose and the pole went through his
head
Immediately after the incident was fine and close to normal
2 weeks later he went into a coma
After the accident he had very little self control, was more irritable
Hobbes viewpoint- our brain produces thoughts and experiences that don’t change even if your
body is altered
What are brain is made of?
How different areas of the brain contribute to complex human behavior and processing
Neuro system responsible for everything we think, feel and do
Neurons: basic units of the nervous system that operate via electron- chemical
signals
o Central nervous system (CNS)
Brain and spinal cord
Body’s decision maker
o Peripheral nervous system ( PNS)
Sensory and motor neurons
Transmits information between body and CNS
Layers
o Nervous system
o Peripheral/ Central (brain and spinal cord)
o Autonomic (controls self regulated action of internal organs and glands)/
Somatic (controls voluntary movements of skeletal muscles)
o Sympathetic (arousing)/ Parasympathetic (calming)
Types of Neurons and their Function
Sensory neurons: (lead towards neurons (body to brain)
o Carry info sensory receptors to the CNS
Motor neurons: (lead AWAY from neurons- Brain to body)
o Carry info from CNS to muscle and glands
o Direct muscles to contract or relax (produces movement)
Interneurons (within brain)
o Communicate within CNS; intervene between sensory inputs and motor outputs
Think of Reflexes- neurons are converting sensation to action
KNOW THE PARTS OF A NEURON FROM LECTURE 2
Dendrites: detect incoming signals
Cell body (soma): collects/ sums input; contains nucleus and cellular material
Axon: transmits signal to axon terminals ( and ultimately to other neurons)
Myelin sheath: covers the axon of some neurons and helps speed up neural impulses
Terminal buttons: small nodules at the end of the axon that release chemicals signals
from the neuron into the synapse
Synapse: the space between the axon of a “sending” neuron and the dendrite of a
“receiving “ neuron – This is hwere/ how neurons communicate
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