2. The Retinofugal Projection
Right and Left Visual Hemifields
Neuroscience: Exploring the Brain, 3rd Ed, Bear, Connors, and Paradiso Copyright © 2007 Lippincott Williams & Wilkins

3. The Retinofugal Projection
Targets of the Optic Tract
Neuroscience: Exploring the Brain, 3rd Ed, Bear, Connors, and Paradiso Copyright © 2007 Lippincott Williams & Wilkins

4. Visual agnosia is an impairment in recognition of visually presented objects.

11. A scotoma (Greek σκότος/skótos, darkness; plural: scotomas or scotomata) is an area of partial alteration in the field of vision consisting of a partially diminished or entirely degenerated visual acuity that is surrounded by a field of normal – or relatively well-preserved – vision.
A depiction of a scintillating scotoma that was almost spiral-shaped, with distortion of shapes but otherwise melting into the background similarly to the physiological blind spot, as may be caused by cortical spreading depression

13. V1 damage and scotoma and blindsight
Smoked glass immediately
Visual noise 4d after (snow on a television)
Cortically blind or BLINDSIGHT
Perceived location w/o being able to see content (B.K.)
Normal color, line, angle, and motion perception (D.B.)
Primary and secondary vision?
Some brain regions function w/o consciousness?
Blindsight is the ability of people who are cortically blind due to lesions in their striate cortex, also known as primary visual cortex or V1, to respond to visual stimuli that they do not consciously see (see Wiki).

14. Blindsight is the ability of people who are cortically blind due to lesions in their striate cortex, also known as primary visual cortex or V1, to respond to visual stimuli that they do not consciously see (see Wiki).
Underlying mechanisms?
Why such mechanisms?
What does it tell us about?

15. Color blindness
Color perception
How color blindness is like

16. Motion blindness (akinetopia)
Motion perception

23. Face blindness http://www.youtube.com/watch?v=dxqsBk7Wn-Y
Cases D and T: Higher-level visual processes
Case D. Prosopagnosia (face blindness)
Case T. Difficulty reading (alexia), naming, and lip reading
Face blindness

24. Disorders of visual pathways Disorders of cortical functions
Visual agnosia
Object agonsia
Apperceptive agnosia
Associative agonosia
Other agnosias
Prosopagnosia
Alexia
Visuospatial Agnosia
Associative visual agnosia refers to a subtype of visual agnosia, which was labeled by Lissauer (1890), as an inability to connect the visual percept (mental representation of something being perceived through the senses) with its related semanticinformation stored in memory, such as, its name, use, and description