1. All action potentials conform to the same profile of continuing to completion once begun, a phenomenon
a. the doctrine of specific nerve energy.
b. the all or none law.
c. Dale's law.
d. the law of parsimony.
2. The scientific approach wherein
EXAM #3 KEY WORDS Motion aftereffect o o Seeing motion where there is no change in the position of an object Due to stimulation by previous image of either inward/outward motion Perceived shape is defined by motion Motion cannot depend only on first
1. Outer hair cells do not send signals to the brain; instead it receives input from the brain ( TRUE). 2. There are four semicircular
canals, each for the yaw, pitch, roll, and rock ( FALSE). 3. Allo-centric navigation refers to finding way via the direc
Space perception: *Virtual reality, its applications, dangers, and how it works (basics). *Depth perception: monocular
cues. *Occlusion *Relative height and size *Aerial perspective / Linear perspective (vanishing point) *Motion
parallax. *Depth perceptio
1. The case of Miss C illustrates how great it is to have no pain receptors ( FALSE). 2. Tactile spatial attention studies showed that an invalid
cue prompted the participants to respond faster to a tactile vibration than the valid cue ( FALSE). 3. The Ou
Recap of intro lecture
Cognitive Science is an interdisciplinary exercise
involving (some areas of):
Psychology, computer science, artificial
intelligence, robotics, linguistics,
anthropology, neuroscience,and philosophy
Its aim is to unders
Olfactory Physiology: Odor: The translation of a chemical stimulus into a smell sensation. Odorant: A molecule that is defined by its
physiochemical characteristics, which are capable of being translated by the nervous system into the perception of smell.
Kinesthesis: Internal sensations that arise from muscles, tendons, and joints and inform us of the positions and movements of our limbs in
space. Proprioception: Perception mediated by kinesthetic and vestibular receptors (the sense of where our body part
Sound (three components): Physical-energy that compresses or decompresses air. Physiological-the energy is
detected by the ear and is converted into neural activity. Psychological-the brain (mind) interprets the neural activity
Motion Perception Pathway: Retina (photoreceptors parasol cells) LGN
(magnocellular layer) Primary Vis Cortex (relatively frew direction-selective
MT (lot of direction-selective cells)
Detectors: sending signals to the different steps in the
Motion and Movement Perception: Motion is a change in position over time. Our visual system registers a series of images across time. It is
good for: 1) Object Detection. Examples: Camouflaged Bird - Gestalt Law called "common fate" - stationary things bl
Receptive Fields are represented as a disk (+) and annulus (-). Center disk
area and annulus inhibitory area. Receptive fields in uniformly white and black
receive about same stimulation in excitatory centers and inhibitory surrounds.
center excitations a
1. Probably the most important fact to know about color vision is that lights and surfaces look colored because a particular distribution of
wavelengths of light is being analyzed by a particular visual system. Color is a mental phenomenon, not
Brain processing of pain in patients
with unresponsive wakefulness
Alexandra Markl et al.
1. Basic sensory regions
- primary and secondary somatosensory cortex (S1,
2. Emotional cognitive responses associated
Recap of visual angle
different distances will
affect the perceived size
and the amt of room it takes
on your retina
Lecture 4: Spatial vision
How do we get from the retina to complex objects?
PSC 131: Lecture 2
Measuring perception with
Detection, discrimination, and signal detection
Detection: Did you hear anything?
Psychophysics measures the relation between physical stimulation
Extra credit assignments are due to day.
- Wri6en assignments must be hard copies. No email
Quiz 6 (last one, yay!)
The Last Quiz
Please write legibly.
1. The case of Miss C illustrates how great it is to have no pain receptors.
2. Virtual reality (VR) closely mimics the real world. VR is capable of implementing
all the sensorial inputs.
3. You cannot
Partial list (more to come!)
Hybrid faces (Einstein/Marilyn)
Structures of the eye (functions, locations)
Components of the retina (photoreceptors, ganglion cells)
Object and face perception (agnosia, prosopagnosia)
What happens to visual cortex when vision is absent?
V1 and blindness
Lecture 6: V1 and blindness
(A) 3 examples from your reading of evidence that visual cortex
is used for processing Braille/ tactile informa
A. V1 and Cortical Magnification
Macro organization of information processing in V1
Lecture 5: Selective
B. V1 Simple Cells
Micro organization of information processing in V1
Orientation selective tuning curves