evaluation of bob's lectures Flashcards
1
Q
colour changes in electromagnetic system are?
A
ABRUPT
2
Q
what is the trichomacy theory?
A
- 3 receptor types
- 3 cones in head to produce colour
- 3 colour system
3
Q
what is the principle of univariance?
A
- only 1 system = cannot tell diffs between changes in wavelength vs intensity
- suffer this at night as brain sees everything as changes in intensity
- any stimulus evokes response
- solved by 2 receptor system
4
Q
what is the 2 receptor system?
A
- short and long wave cones
- stimulus activates both receptors but in diff ratios
- ratio does not change in intensity
- colour = ratio of activity in both channels and this produces greatest colour-change sensitivity when ratio changing fastest
5
Q
what is the primordial colour system?
A
- blue/yellow
- output of blue vs other cones
- little short wave cones but lots of medium
6
Q
what is the second subsystem colour system?
A
- red/green
7
Q
what is the parvocellular pathway?
A
- red/green
- LGN to V1
8
Q
what is the kinocellular pathway?
A
- yellow/blue
- LGN to V1
9
Q
cells in V1 are?
A
directionally selective
10
Q
A
