2.3 Flashcards
Where do gangolin cells send info to and where does it receive info from
Sends info to the CNS (firing action potential) and receives it from photoreceptors
What happens if you shine light in the peripheral vision
You will get inhibition
True or false
Gangolin cells receptors are filed in the LARGEST of units on the retina
False they are filed in the SMALLEST of units
What neurotransmitter is released from photoreceptors and bipolar cell
Glutamate
When glutamate is release from a bipolar cell onto a gangolin cell what type of response happens
Excitatory
If you shine light in the middle of the eye what type of response do you get
Excitatory
If you shine light on the outside of the eye what type of response do you get
Inhibition
In the dark your do photoreceptors hyper polarize or depolarize and what does it cause
Depolarize and open sodium channels
In the light do photoreceptors hyper polarize or depolarize and what does it cause
Hyperpolarize and sodium channels close
What happens if you stimulate the center of vision
You decrease release of neurotransmitter
What happens if you decrease neurotransmitter
It becomes inhibited
What does light stimulation cause in relationship to firing range
Decreases firing range
True or false
Light stimulation ALWAYS decreases neurotransmitter
True
What do horizontal cell do
Sharpen contrast in vision
Do on-bipolar cells get excited or inhibited with light stimulation
Excited
Do off-bipolar cells get excited or inhibited with light stimulation
Inhibited
What separates you vision the retina and which is medial and lateral
Nasal-medial
Temporal-lateral
Which side of the brain does temporal info go
The same side of your brain
Which side of the brain does nasal info go to
Opposite side of the brain
Where is lateral geniculate and what’s its function
In the nucleus in the thalamus and receives concussion info
Where is pretectum and what’s its function
It’s in your midbrain and involves light stimulation
What’s the function of superior colliculus and what’s it important for
Is in charge of very quick responses and important in saccadic eye movement
What is saccadic
Very quick eye movement
What is saccadic eye movement mediated by
Frontal eye field
What does left monocular vision field contain
Contains temporal and nasal superior and inferior retina
What is the largest portion of the cortex
Macula
True or false
If you have a lesion under your cortex will you vision remain normal
True
What’s the function parvocelluar gangolin cell
Small receptive fields (high resolution and static detail and from cortex vision)
What’s the function of magnocelluar gangolin cell
Big receptive field (come from peripheral, not good resolution, light sensitive, and respond well to moving stimulate)
How many photopigments do comes have and where are they
They have 3 and in the center of your vision
