Vision pt. 2 Flashcards
Exam 2
Many __________ can converge on one bipolar cell
rods
1 or few __________ can converge on a bipolar cell
cones
P ganglion cells are sent by ______ and are for ______ and _______
Cones; color; acuity
M ganglion cells are sent by _______ and are for _______ and _______
Rods; Motion; achromatic
Optic chiasm
Where optic nerve fibers cross over
Lateral geniculate nucleus (LGN)
The visual relay points in the thalamus
Striated Cortex
Early visual cortex/primary visual cortex (V1)
Binocular zone
Where left and right visual fields overlap
Monocular zone
The portion of visual fields associated with one
The right ________ and _________ for left vision
LGN; V1
The _______ LGN and V1 is for right vision
Left
Process of left vision into the visual cortex (3 steps)
- Left visual field is left nasal and right temporal
- Left nasal crosses and goes to RLGN with right temp.
- RLGN leads to RV1
Process of right vision into the visual cortex (3 steps)
- Right visual is right nasal and left temporal
- Right nasal crosses and goes to LLGN with Left temp.
- LLGN leads to LV1
What are the bottom 2 layers ? Are they thinner or thicker?
Magnocellular; thinner
Magnocellular cells synapse with _ Retinal ganglion cells
M
What are the top 4 layers? Are they thinner or thicker?
Parvocellular; thicker
Parvocellular cells synapse with _ retinal ganglion cells
P
What cells are unable to see?
Koniocellular Cells
What are koniocellular cells used for? What do they synapse with?
Color and P
The LGN process information from both/a single eye(s), but one/multiple visual field(s)
both; one
What is the primary visual cortex?
A part of the occipital lobe that directly correlates with visual processing
Left V1 processes the ________ visual field
Right
Right V1 processes the _________ visual field
Left
What does Retinotopic mean?
Neurons organized in V1 like a map of the retina
V2/V3 responsibilities
Further processing; combination of signals
V4 responsibilities
Color interpretation
V5/MT responsibilities
Motion detection
Dorsal pathway is called the _________ pathway. It goes ______ from V1 to __________________. It’s main task is to ________________ and _____________________
Where; Up, Parietal; Identify objects and facial recognition
The Ventral pathway is called the ___________ pathway. It goes ________ from V1 to ____________. It’s main task is to ________________
What; horizontally; temporal; Recognize spatial awareness
