CHAPTER 1 Flashcards
Origins of Behavioral Neuroscience
Generalization
Scientific explanation - a general conclusion based on many observations of similar phenomena
Reduction
Scientific explanation - A broader complex phenomena described using smaller ideas.
Break down phenomena into simpler fundamental components.
Dualism
Approach to the mindbody question - The body is physical, and the mind (soul) is not.
Body and mind are separate.
body = ordinary matter
mind = not ordinary matter
Monism
Approach to the mindbody question - Everything consists of matter and energy.
The mind is a phenomenon produced by the workings of the nervous system.
Hippocrates
concluded that the role of thoughts and emotions should be assigned to the brain.
Aristotle
concluded that the role of thoughts and emotions should be assigned to the heart.
The brain cooled the passions of the heart.
Galen
demonstrated that nerved connected to the brain
- looked at different animals and discovered a highway of connections.
Rene Descarte
Believed animal behaviors to be controlled by the environmental stimuli.
Supporting monism - found human body movements can be automatic
Discovered reflexes - touch something hot - immediately move away
Reflexes
Automatic, stereotypical movement produced by the direct result of stimulus
I.e. something hot, you immediately move away from it.
Luigi Galvani
Studied how nervous system send messages to the muscles
Experimented on frogs using electric stimuli which resulted in a muscle contraction
Prompted others to study messages transmitted by the nerve and muscles
Johannes Muller
Discovered that messages in the brain occur in different channels of the brain. The brain is functionally divided.
Studied animal organs and tested responses using various chemicals and alternating environments (understanding the working of the body)
Doctrine of Specific Nerve Energies
Muller’s conclusions - because all nerve fibers carry the same type of message, sensory information must be specified by particular nerve fibers thar are active.
Nature of perception is defined by the pathway rather than which sensory information is carried
Example:
messages carried to optic nerves produce sensations of visual images
messages carried by auditory nerves produce sensations of sound
Pierre Florens
Discovered brain ablations
Experimental Ablation
Research method is which function o a part of the brain is inferred by observing behaviors and animal can no longer perform
Intentionally damaging the brain and observing the effects of said damage.
Paul Broca
Used Experimental ablation - found that damage to the frontal left hemisphere causes a loss of speech
Resulted in Broca’s area in the left side of the brain - performs functions necessary for speech
Epigenetics
Changes to gene expression induced by environmental factors.
Functionalism
Principle - the best way to understand a biological phenomenon (a behavior or a physiological structure) is to try and understand it’s useful function for the organism
Example:
Large talons = large prey
green color = caterpillars camouflage and survive
Natural Selection
Process by which inherited traits that confer a selective advantage become more prevalent in the population
MOTH EXAMPLE - the changing of environment - only those who can adapt survive, those who don’t die. Those that survive pass on said survival genes to others.
Mutations
How the transition from generation to generation.
- accidental changes in chromosomes
Change in genetic information contained in chromosomes of sperm or eggs, and be passes on to an organism’s offspring; provides genetic variability
- If a mutation kills you, it is not passed on
- CAN be passed on if it helps you survive - thus evolution occurs
Selective Advantage
A characteristic of an organism that permit it to produce more than the average number of offspring of it’s species
- can be physical traits
- effects pf physical changes can be seen in animal behavior.
Evolution
Gradual change in structure and physiology of plant and animal species - generally produce more complex organisms - as a result of natural selection
(GRADUAL)
Neoteny
Brain size is limited by birth canal. - solution
A slowing of the process o maturation allowing more time for growth; an important factor in development of large brains.
- This is why elephants have bigger brain than us yet we are smarter
- this continued growth created a “programmable computer
-Allows ability for what the environment is requiring
EX. deaf orphans with no adults - creating their own sign language - example of neoteny
Institutional Animal Care and Use Committee
A committee with the intention of insuring the humane treatment of all animals within a scientific environment.
The 3 R’s of Animal Research
Replacement, Reduction, Refinement