Exam Two: Vision Flashcards
What are the essentials a Sensory System Should have?
- Be able to differentiate the different types of energy forms
- Should be reliable and rapid in response
- Can discriminate among different intensities
- Should express extraneous information
What should all Sensory Systems have?
- Specialized Organs
- Specialized Receptor Cells
- A specific pathway to cortex
(Organs, Receptor, Cortex)
What is the order of the general pathway sensory information should take?
- Receptor
- thalamic relay nuclei
- primary sensory cortex
- Sencondary sensory cortex
- Association cortex
What is the function of the Primary Cortex?
Receives input from Thalamus and processes basic information
What is the function of the secondary Cortex?
Receives input from the primary cortex and processes higher order information like specific forms and motion
What is the function of the Association Cortex
Receives input from more than one sensory system and interacts with the motor system
If there is no _____ there is no vision?
Light
What area of the eye is specialized for high acuity vision/detailed vision?
The Fovea
Gap between the retina tissue where the axons leave the eye:
The blind Spot
What creates the Blind Spot in the Eye?
The Optic Nerve
What is completion
You are able to see a figure as complete even when part of it is in the blind area of the eye
How is light energy transduced in the eye and created into neural signals?
By Photoreceptors called Rods and Cones
What are the 5 layers of cells a signal has to go through before it leaves the eye?
Photoreceptors Horizontal Cells Bipolar Cells Amacrine Cells Retinal Ganglion C
Outline Scotopic Vision
- “Night Vision”
- Poor Detail
- No Color Vision
- Mediated By Rods
Outline Photopic Vision
- Mediated by Cones
- High Acuity
- Low sensitivity
- Responsible for color vision
