Exam 1 - Chapter 2 Flashcards
_________ : the study of the physiological bases of cognition
Cognitive neuroscience
Cognitive neuroscience: the study of the _________ bases of cognition
physiological
Cognitive Neuroscience: _________ the physiological basis of cognition
Understanding
_________ —all problems can be studied a number of different ways; each approach offers it own unique identification
Marr’s levels of analysis
Marr’s levels of analysis—all problems can be studied a number of different ways; each approach offers it own unique _________
identification
If a particular _________ is reached in the cell body, an electrical signal is transmitted down the _________
- threshold
- axon
Action Potentials & Measurement
We can measure this electrical signal in a single _________
neuron
-Properties of the Electrical Signal-
Same voltage along the axon (signal does NOT _________ )
degrade
-Properties of the Electrical Signal-
Signal is always the _________ , regardless of intensity
same size
-Properties of the Electrical Signal-
Signal is always the same size, regardless of intensity
However, the neuron fires more frequently for _________ signals
intense
-Properties of the Electrical Signal-
Signal is always the same size, regardless of intensity
-Not the degree of size to which they fire, but how _________ they fire increases
often
_________ -: small gap between neurons
Synapse
_________ : chemicals sent across the synaptic gap
Neurotransmitters
Neural Response-
Excitatory (+) transmitters cause _________
depolarization
Neural Response-
Excitatory (+) transmitters cause depolarization
- Neuron becomes more _________
- _________ the likelihood of an action potential
- positive
- Increases
Neural Response-
_________ transmitters cause depolarization
- _________ becomes more positive
- Increases the likelihood of an _________-
- Excitatory (+)
- Neuron
- action potential
Neural Response-
Inhibitory (-) transmitters cause _________
hyperpolarization
Neural Response-
Inhibitory (-) transmitters cause hyperpolarization
- Neuron becomes more _________
- _________ the likelihood of an action potential
- negative
- Decreases
Neural Response-
_________ transmitters cause hyperpolarization
- Neuron becomes more negative
- Decreases the _________ of an action potential
- Inhibitory (-)
- likelihood
-Principle of Neural Representation-
Representation of the ‘real world’
We do not perceive the world _________, instead the outside world needs to be transformed (transduced) to a signal that can be used by the _________
- directly
- brain
-Principle of Neural Representation-
Representation of the ‘real world’
We do not perceive the world directly, instead the _________ world needs to be transformed (_________) to a signal that can be used by the brain
- outside
- transduced
-Principle of Neural Representation-
_________ – taking energy from one energy for to another energy form
Transduction
-Principle of Neural Representation-
Transduction– taking energy from one energy for to another _________
energy form
-Principle of Neural Representation-
Rods and cones are turning the light coming in, into an _________ signal coming into the brain
electrical
-Single Neuron Representation -
_________: neurons that respond to specific stimulus features (e.g., orientation, movement, length)
Feature detectors
-Single Neuron Representation -
Feature detectors: neurons that respond to specific _________ features (e.g., _________, movement, length)
- stimulus
- orientation
-Single Neuron Representation -
Feature detectors-
_________ : respond to size, orientation, movement direction
Simple detectors
-Single Neuron Representation -
Feature detectors-
_________ : respond to more complex shapes
Complex detectors
-Single Neuron Representation -
Feature detectors-
Simple detectors: respond to size, _________, movement _________
- orientation
- direction
-Single Neuron Representation -
Feature detectors-
Complex detectors: respond to more _________ shapes
complex
_________ detectors - detect information about our environment such as size, orientation, movement direction (essential elements)
-Simple
Simple detectors - detect simple information about our environment such as size, orientation, movement direction (_________ elements)
essential
_________ detectors – look at combinations of things ex; length and width
Complex
Complex detectors – look at combinations of things ex; _________
length and width
_________ -
Specificity coding—a neuron only fires for a specific stimuli (e.g., Dr. H cell)
-Multiple Neuron Representation
-Multiple Neuron Representation -
_________ —a neuron only fires for a specific stimuli (e.g., Dr. H cell)
Specificity coding
-Multiple Neuron Representation -
Specificity coding—a neuron only fires for a _________ stimuli (e.g., Dr. H cell)
specific
-Multiple Neuron Representation -
_________ -
“Grandmother Cell” Hypothesis”
Specificity coding
_________ – One individual cell for each thing, person, place
Specificity coding
Specificity coding – One individual cell for each _________, person, _________
- thing
- place
Problems with Specificity coding :
- Would need tons of _________ to categorize all things we know
- If a cell dies, that thing related to that cell would _________
- cells
- disappear
Problems with Specificity coding :
- Would need tons of cells to _________ all things we know
- If a cell _________ , that thing related to that cell would disappear
- categorize
- dies
_________—pattern of firing across many neurons codes specific objects (e.g., Dr. H pattern)
Population coding
Population coding—pattern of firing across _________ neurons codes specific _________ (e.g., Dr. H pattern)
- many
- objects
_________ - Particular pattern of cells or neural firing for each person/thing we see
Population coding
Population coding - Particular pattern of cells or neural firing for each _________ we see
person/thing
_________ —similar to population coding, except only a few cells are responding
Sparse coding
Sparse coding—similar to population coding, except only a _________ cells are responding
few
_________ -
‘Middle ground’ between specificity & population coding
Sparse coding
Sparse coding – Mix between specificity and population coding – Not just one cell, not a ton of cells, but a few cells with _________ particular cell always firing along with a few others for a _________ thing
- one
- specific
_________-
Controls basic life functions (e.g., heartbeat, breathing), posture, balance
Hindbrain
Hindbrain -
Controls basic life functions (e.g., _________ , breathing), _________, balance
- heartbeat
- posture