Differences

This shows you the differences between two versions of the page.

--- visualprocessing [2025/02/22 14:15] – created andrewtaustin
+++ visualprocessing [2025/02/22 14:22] (current) – [Visual Processing Pathway] andrewtaustin
@@ Line 5: / Line 5: @@
 ===== Visual Fields: Definition and Structure =====
-The **visual field** refers to the entire area that can be seen when the eyes are fixed on a single point. It encompasses both central (foveal) and peripheral vision, forming a roughly circular field extending approximately 180 degrees horizontally and 130 degrees vertically per eye. Binocular overlap between the two eyes creates a stereoscopic zone critical for depth perception.
+{{ :visual-fields.jpg?600 |}}The **visual field** refers to the entire area that can be seen when the eyes are fixed on a single point. It encompasses both central (foveal) and peripheral vision, forming a roughly circular field extending approximately 180 degrees horizontally and 130 degrees vertically per eye. Binocular overlap between the two eyes creates a stereoscopic zone critical for depth perception.
   * **Monocular Visual Field**: The area seen by one eye alone, including a nasal and temporal hemifield.
@@ Line 16: / Line 16: @@
 ===== Anatomy of the Occipital Lobe =====
-The **occipital lobe**, located at the posterior of the brain, is the primary hub for visual processing. Bordered by the parietal and temporal lobes, it houses several key areas dedicated to interpreting visual stimuli. Its main structure, the **primary visual cortex (V1)**, lies along the calcarine sulcus and is the first cortical region to process visual input from the retina via the optic nerve, optic chiasm, optic tract, and lateral geniculate nucleus (LGN) of the thalamus.
+{{ :parcellation_of_different_cortical_regions_involved_in_visual_processing.jpg?600 |}}The **occipital lobe**, located at the posterior of the brain, is the primary hub for visual processing. Bordered by the parietal and temporal lobes, it houses several key areas dedicated to interpreting visual stimuli. Its main structure, the **primary visual cortex (V1)**, lies along the calcarine sulcus and is the first cortical region to process visual input from the retina via the optic nerve, optic chiasm, optic tract, and lateral geniculate nucleus (LGN) of the thalamus.
 Other notable regions include:
@@ Line 28: / Line 28: @@
 Visual processing begins when light enters the eye, stimulating photoreceptors (rods and cones) in the retina. The signal travels through the following stages:
-. **Retina**: Converts light into electrical impulses via ganglion cells, which form the optic nerve.
+  * **Retina**: Converts light into electrical impulses via ganglion cells, which form the optic nerve.
-. **Optic Chiasm**: Nasal fibers from each eye cross, ensuring both hemispheres receive input from both visual hemifields.
+  * **Optic Chiasm**: Nasal fibers from each eye cross, ensuring both hemispheres receive input from both visual hemifields.
-. **Lateral Geniculate Nucleus (LGN)**: A thalamic relay station that organizes and forwards signals to V1.
+  * **Lateral Geniculate Nucleus (LGN)**: A thalamic relay station that organizes and forwards signals to V1.
-. **Primary Visual Cortex (V1)**: Analyzes basic features like edges, orientation, and contrast.
+  * **Primary Visual Cortex (V1)**: Analyzes basic features like edges, orientation, and contrast.
-. **Higher Visual Areas**: V2-V5 and beyond integrate these features into coherent perceptions (e.g., recognizing a face or detecting motion).
+  * **Higher Visual Areas**: V2-V5 and beyond integrate these features into coherent perceptions (e.g., recognizing a face or detecting motion).
 This hierarchical processing allows the brain to construct a detailed, dynamic representation of the visual world.