Unit 3

Seminar - Attend the seminar or complete the option 2 seminar assignment

Discussion questions address the following: 1) electrochemical and chemical components affecting our

thoughts, behaviors, and emotions; and 2) what

happens when parts of the brain fail. Remember to provide 150 minimum

word responses to both questions and

provide 2 fifty word responses to students. To receive full credit, post

responses by 11:59pm EST on Tuesday.

What is a Neuron? Parts of the Neuron

Cell Body DendritesAxon Myelin Sheath Terminal Branches Synapse

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Glial cells Support cells

Types of Neurons Sensory

neurons Motor neurons Interneurons

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Action potential Threshold Myelin

and Nodes of Ranvier

Refractory period

Drugs work by interfering with synaptic transmission

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Organization of the Nervous System Central (brain & spinal cord) Peripheral▪ Somatic▪ Autonomic▪ Sympathetic▪ Parasympathetic

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Part 1: Hindbrain Medulla Reticular formation Cerebellum Pons

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Part 2: Midbrain Tectum Tegmentum

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Part 3: Forebrain Cerebral cortex Subcortical

structures▪ Thalamus▪ Hypothalamus▪ Pituitary

gland▪ Hippocampus▪ Amygdala

Frontal LobeParietal LobeTemporal LobeOccipital LobeAssociation

Areas Corpus

Callosum

GenesChromosomes Monozygotic and Dizygotic Twin

Studies Heritability

Phineas Gage story

Right and Left hemispheres

Electroencephalogram (EEG)

Computerized axial tomography (CT)

Magnetic resonance imaging (MRI) Dr. Riley’s MRI of her neck

Positron emission tomography (PET)

Functional magnetic resonance imaging (fMRI) Detects oxygenated

hemoglobin and provides a picture of the level of activation in each brain area