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Chapter 3: Nervous System
Nervous system, function
44
Psychology
Undergraduate 1
09/15/2010

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Cards

Term
Neuron
Definition
-Basic unit of NS; specializes in communication
Term

Sensory Neurons

(Afferent neuron)

Definition
-Sends signals from sensory world > brain
Term

Motor Neurons

(Efferent)

Definition
-Sends signal from brain > muscles
Term
Interneurons
Definition
-Communicate w/in short/long distance circuits
Term
Dendrites
Definition

-Short, branchlike appendages

-Increase neuron's receptive field; detects chemical signals from neighboring neurons

Term
Cell Body
Definition
-Where info received from neurons is collected/integrated
Term
Axon
Definition
-Long, narrow outgrowth where electrical signals are transmitted
Term
Terminal Button
Definition

-Small nodule at axon's end

-Receives electr impulses > releases chemi signals from neuron to synapse

Term

Synapse

(synaptic cleft)

Definition

-Space in b/w neurons

-Site for chemi communication

Term
Nodes of Ranvier
Definition
Term
Action Potential
Definition
-Electrical signal that passes along axon & causes release of chemicals that transmit signals to other neurons
Term
Neurotransmitter
Definition
-Chemi substances that carry signals across synapse
Term
3 events that terminate transmitter's influence on synapse:
Definition

1. Reuptake

2. Enzyme Deactivation

3. Autoreception

Term
Agonist
Definition
-Drugs that enhance neurotransmitter's actions
Term
Antagonist
Definition
-Drugs that inhibit neurotransmitter's actions
Term
Reuptake
Definition
-Neurotransmitter is taken back into axon
Term
Autoreceptor
Definition

-Autoreceptor binds to neurotransmitter and deactivates it

-"Temporary parking"

 

 

Term
Enzymatic Deactivation
Definition
-Enzymes destroy neurotransmitter
Term
Central Nervous System
Definition
-Brain & spinal cord
Term
Peripheral Nervous System
Definition
-All other nerve cells
Term
Equipotentiality
Definition
-All areas of the brain are equally important
Term
Franz Gall
Definition
-Proposed phrenology
Term
Gray Matter
Definition
-Neuron's cell bodies
Term
White Matter
Definition
-Axons
Term
Brainstem consists of...
Definition

1. Medulla oblongata

2. Pons

3. Midbrain

Term
Cerebellum
Definition

-Motor function

-Experience of empathy

Term
Forebrain
Definition
-L/R hemispheres
Term
Hypothalamus
Definition

-Brain's master regulatory structure

-Receives input > projects influence

Term
Thalamus
Definition
- Gateway to cortex
Term
Hippocampus
Definition

-Stores new memories

-Changes w/ experience

Term
Amygdala
Definition
-Role in learning to associate things w/ emotional responses
Term
Basal Ganglia
Definition
-Structures crucial for planning/producing movement
Term
Cerebral Cortex
Definition

-Outer layer; site of thoughts, detailed perceptions, consciousness

- 4 lobes: occipital, parietal, temporal, frontal

Term
Occipital Lobe
Definition
-Vision; back portion of head
Term
Parietal Lobe
Definition
-Touch
Term
Temporal Lobe
Definition
-Hearing
Term
Frontal Lobe
Definition
-Planning, movement
Term
Prefrontal Cortex
Definition
-Attention, making/acting on plans, behaving, understanding, contemplating
Term
Somatic Nervous System
Definition

-Part of PNS

-Transmits sensory signals to CNS via nerves

Term
Autonomic Nervous System
Definition

-Part of PNS

- Regulates body's internal environment by stimulating glands & maintaining organs

Term
Sympathetic Division
Definition

-Part of ANS

-Prepares body for action

Term
Parasympathetic Division
Definition

-Part of ANS

-Restores body to normal state

Term
V.S. Ramachandran
Definition
-Neuroscientist who conducted studies on phantom limbs and synesthesia
Term
[image]
Definition

1. Temporal

2. Occipital

3. Parietal

4. Frontal

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