Class Notes (835,294)
Canada (509,074)
Psychology (1,975)
PSY 102 (450)
Lecture 3

Lecture 3 - Biology Psychology .doc

5 Pages
132 Views
Unlock Document

Department
Psychology
Course
PSY 102
Professor
Stephen Want
Semester
Fall

Description
Lecture #3 – Biology Psychology • Complicated mathematics; to bring arm to the front or touch nose o Implicit mathematics; years of practice/experience o Precise combination of muscle tension o Compensate for weight of object/shape • Brain decoding sound, patterns of vibration => air molecules • Waves in the air molecule, ear drums are moving -> decoding into words • Brain does tasks that we don’t listen to • CNS: brain and spinal cord • PNS: network of neurons that connect • Brain consists of 100000000000 neurons that connected to one another • Sensory (afferent) neurons – outside world  physical movement o Language of the brain o Vibration -> signals o Pressure info – signal (electrochemical system) • Interneurons: coordinate and take in what’s happening in the outside world • Motor neurons: efferent – (See glass of water, pick up glass) • Glial Cells: support network, enable you to think about things o Placeholders; efficient due to structure o Nutrient/oxygen supplier (feed neuron) o Housekeeper: clean away and recycle o Insulator – message will dissipate if otherwise (cover neuron with fatty layer – speed up signal) • Structure of Neuron s o Dendrites connected to neurons – receive info o Soma – summed up info (cell body) o Axon terminal buttons – connect to dendrites of other neurons • Neural Transmission: The Electrochemical Message o Info received through dendrites o Excitatory: excited o Inhibitory: input o Stimulates release of chemical o Partly electrical, partly chemical o Gap between dendrite and terminal button  Chemical are stored in the terminal button • Synapse o Action potential (on and off)  All or nothing • Once threshold is reached (similar to a toll booth)  Fundamentally the same regardless of the message  One speed of neuron has to transmit messages  Either sends a signal or it doesn’t  Myelinated: speeding up brain/neuron • Smarter – processing info faster • Coding Intensity of Stimulus o Send message as often as possible o Electrical message – packets of chemicals in terminal buttons o Inhibition (hyperpolarization)  Brain neurotransmitters o Acetylcholine – neurotransmitter in CNS and PNS (memory & Alzheimer’s disease) o Dopamine – inhibitory receptors, smooth muscle movement  Parkinson’s disease – lack of dopamine – shaky movement, wrong muscle movements are inhibited • Drugs and Our Brain o Chemicals affecting our electrochemical signals (3 ways)  Agonists: mimics function of neurotransmitter (copying functions) – Nicotine  Antagonists: opposite way – block neurotransmitter from doing what they do  Neuromodulator – enhance the action of the brain’s neurotransmitter  Jamming the wrong key (inhibition) o Curare: antagonist  Oppose action of acetylcholine  Acetylcholine acts in an excitatory way to activate muscles  With acetylene inhibited, diaphragm cannot
More Less

Related notes for PSY 102

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit