[PSY 250] - Midterm Exam Guide - Everything you need to know! (22 pages long)

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PSY 250
MIDTERM EXAM
STUDY GUIDE
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PSY 250 Biopsych | Class Notes 1
Does size matter?
Brain facts:
Weight 1300 g = 1.3kg || chimp 420g || Dolphin 1500g || Elephants 4700g
86 bill neurons
100 trillion connections
20-25% of total energy
What is Biopsych
- Discipline of neuroscience
- Study of nerv syst to understand how we perceive, feel, think, say and do
- Interdisciplinary and technical
- Nerv syst many struct w/ substruct
- Molecular cellular structural syst
- How does complex behavior emerge from an electrochemical syst.
- How do all parts of nerv syst work together to make one unit?
History
- Rene Descarte - mind/body relationship
- Santiago Ramon y Cajal nerv syst composed of neurons
- Donald O. Hebb
a. “The organization of behavior”
b. Brain not only mass of tissue
c. Highly integrated series of “cell assemblies“ that perform specific funct and more
- How to study the unobservable
a. Phrenos (mind) logos (study of a thing) measure physical characteristics of skull to
determine person’s character and mental capacity
b. Modern approach combo of theories and research approaches from many areas to describe,
understand and predict behavior
i. Highly interdisciplinary (psych, molecular bio, physiology, pharmacology, anatomy,
cs, engineering)
c. Examining inner working requires advanced tech
d. Use of different species comparative approach
i. Advantages of human subj = better control, follow instruct, report subj experiences,
human brains
ii. Advantages of nonhuman subj = simpler nerv syst, evolutionary continuity, test more
specific, allowed more invasive
CNS vs. PNS
- CNS (Central Nerv Syst)
a. Brain
b. Spinal Cord
- PNS (Peripheral Nerv. Syst)
a. Autonomic Nerv Syst regulates internal env
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i. Sympathetic NS speed up
ii. Parasympathetic NS - slow down
b. Somatic NS deals w/ skeletal system
i.
ii. Motor nerves
Brain Formation
- Tube expansion
- Forebrain, midbrain, hindbrain
- Telencephalon (cerebral hemispheres) from forebrain
a. Cerebral Cortex outer covering of cerebral hemispheres
- Diencephalon (forebrain)
- Mesencephalon (midbrain)
- Metencephalon (hindbrain)
- Myelencephalon (hindbrain)
Blood Brain Barrier
- Keeps blood stream from coming in direct contact w/ neurons
- Keeps brain substances from directly entering blood stream
- BBB protects brain; and brain decides what can come through
- Disadvantage hard to transmit nutrition, if sick need different medications
- Fat soluble don’t require energy; nutrients need active transport
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