It occurs when visual information from the occipital lobe cannot pass to the areas of the brain that process language. Instead, looking at a piece of writing would just look like strange lines and symbols. Color agnosia is similar to normal color blindness. Except whereas color blindness affects color perception , color agnosia affects color knowledge. With color agnosia, the mechanisms in the eye that enable a person to see color remain intact.
But the person could not tell you what color they see. This rare condition causes a person to not perceive motion in their visual field. Instead, you might see motion as a series of stills, like something moving under a strobe light. In severe cases, you might not be able to detect motion at all, but your vision of stationary objects would still be intact. This symptom makes it almost impossible for a person to perceive more than one object at a time.
It is common after both parietal and occipital lobe damage. They also could not see their fork if they were looking at their plate. To deal with occipital lobe damage, your best course is to start occupational therapy, which can help you learn effective compensatory tactics. For example, people with word blindness can utilize strategies that many blind patients use to read, such as text-to-speech programs or braille.
To take part in scanning therapy and other treatments for occipital lobe damage, make an appointment with a certified vision rehabilitation specialist , typically a neuro-optometrist.
Even though they might not cure your vision loss, they can help make living with it a little easier. Damage to the occipital lobe can cause blindness and other visual distortions, including hallucinations.
Although living with visual problems can be difficult, therapists and neuro-optometrists can help you adapt and make things a little easier. Vision therapy techniques might also help you improve the vision you still have.
Keep in mind that the brain is remarkably adaptive. With enough therapy, it can actually rewire nerve cells to allow undamaged brain regions to take over functions from damaged ones. Which means even if you have severe occipital lobe damage, you might still regain your sight after brain injury. Each of these regions carries out specific functions, and damage to any of these areas results in corresponding impairment.
The frontal lobes are relatively large compared to other regions of the brain, and the extensive functions controlled by the frontal lobe reflects that large size. The occipital lobes are vital for visual processing. A stroke of the occipital lobe can cause vision loss or partial vision loss of one eye or both eyes. Because of the way the blood vessels are arranged in the brain, occipital lobe strokes are less common than strokes affecting the frontal lobes, temporal lobes, and parietal lobes.
Fig: branching point of the right middle cerebral artery MCA trunk red circle , suspicious for thrombus or embolus. Of the 4 major lobes of the brain, the occipital lobe is the smallest—but in our daily lives, we perhaps lean on it the most. Put simply, the occipital lobe controls our ability to respond to things we see.
Another cause of occipital lobe damage is a posterior cerebral artery stroke, according to Medscape. Some of the complications include:. World View. Those include:. Like all other lobes of the brain, the occipital lobe contains a number of structures and neuronal tracts that work together to enable vision. Brain imaging studies have revealed that neurons on the back of the gray matter of the occipital lobe create an ongoing visual map of data taken in by the retinas.
No part of the brain is a standalone organ that can function without information from other parts of the body. The occipital lobe is no exception. Although its primary role is to control vision, damage to other brain regions and body parts can inhibit vision. Moreover, some evidence suggests that, when the occipital lobe is damaged, nearby brain regions may be able to compensate for some of its functions.
The occipital lobe is heavily dependent on:. The most obvious effect of damage to the occipital lobe is blindness, but occipital lobe damage can have other surprising effects:. Spinal cord injuries are traumatic for patients and their families.
They cause disruptive changes to every aspect of your life and there is a lot of new information to navigate and understand. Our experts have collected everything in one place to help you learn more about your injury, locate doctors and treatment centers, find financial support, and get assistance navigating your next move.
Author: Spinalcord. Where is the Occipital Lobe Located? What Does the Occipital Lobe Do? Those include: Mapping the visual world, which helps with both spatial reasoning and visual memory.
Most vision involves some type of memory, since scanning the visual field requires you to recall that which you saw just a second ago. Determining color properties of the items in the visual field. Assessing distance, size, and depth. Identifying visual stimuli, particularly familiar faces and objects. Transmitting visual information to other brain regions so that those brain lobes can encode memories, assign meaning, craft appropriate motor and linguistic responses, and continually respond to information from the surrounding world.
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