The Occipital Lobe
Where it does it and What its doing
The first functional area is the primary visual cortex. It controls a small description of the local orientation, spatial-frequency and color withing small receptor fields. It then projects to the ventral steam. The Ventral stream is known for the processing the "what" in vision, while the dorsal stream handles the "where/how." This is because the ventral stream provides important information for the identification of stimuli that are, stored in memory. With this information in memory, the dorsal stream is able to focus on motor actions in response to the outside stimuli.
Vocabulary of The Occipital Lobe
2nd- Visual Cortex: The cortical area that receives information from the lateralgeniculate body of the thalamus
3rd-The Ventral Stream:This is because the ventral stream provides important information for the identification of stimuli that are, stored in memory
What Does it Control?
Some Disorders Related to it
Prosopagnosia: Another condition caused by bilateral damage to the occipital lobe, prosopagnosia affects the patient's ability to recognize faces visually. Prosopagnosia can also occur with visual object agnosia.
Visual Object Agnosia: A patient with visual object agnosia can see familiar objects, but when asked to identify the objects, she cannot recognize them. Visual object agnosia occurs when there is damage to the right hemisphere occipital lobe and left hemisphere occipital lobe (bilateral damage)
Visual Hallucinations:Seizures may occur in the occipital lobe, which can cause visual hallucinations. The patient may see rapid blinking, colored lights or flickering lights. Occipital lobe seizures,it accounts for 5 to 10 percent of epilepsy cases, can be triggered by flashing lights.