Calcarine sulcus: Difference between revisions

Latest revision as of 10:57, 23 March 2025

Calcarine Sulcus[edit]

The calcarine sulcus is a prominent anatomical feature of the medial surface of the brain, located in the occipital lobe. It is a deep groove that plays a crucial role in the visual system of the human brain.

Anatomy[edit]

The calcarine sulcus begins near the occipital pole and extends forward to the parieto-occipital sulcus. It is situated on the medial aspect of the occipital lobe and is bordered by the cuneus above and the lingual gyrus below. The sulcus is approximately 5 cm in length and is one of the earliest sulci to develop in the human brain.

Function[edit]

The calcarine sulcus is significant because it contains the primary visual cortex, also known as Brodmann area 17. This area is responsible for processing visual information received from the retina via the optic nerve. The primary visual cortex is essential for interpreting visual stimuli, such as light, color, and movement.

Development[edit]

The calcarine sulcus is one of the first sulci to form during fetal development. It appears around the 20th week of gestation and continues to develop throughout the prenatal period. Its early formation is crucial for the proper development of the visual system.

Clinical Significance[edit]

Damage to the calcarine sulcus or the surrounding primary visual cortex can result in visual field defects, such as hemianopia, where there is a loss of vision in half of the visual field. This can occur due to stroke, trauma, or tumors affecting the occipital lobe.

Related Structures[edit]

The calcarine sulcus is closely associated with several other structures in the occipital lobe, including:

The cuneus, which lies superior to the sulcus.
The lingual gyrus, which is located inferior to the sulcus.
The parieto-occipital sulcus, which intersects with the calcarine sulcus.

Images[edit]

Anatomical illustration showing the calcarine sulcus

Related Pages[edit]

@@ Line 1: / Line 1: @@
-'''Calcarine Sulcus'''
+==Calcarine Sulcus==
-The '''calcarine sulcus''' is a prominent anatomical feature of the [[human brain]]. It is a deep fissure located in the [[occipital lobe]], the region of the brain responsible for processing visual information. The calcarine sulcus is of significant importance in the field of [[neuroscience]] due to its role in the visual system.
+[[File:Calcarine_sulcus_animation_small.gif|Animation of the calcarine sulcus|thumb|right]]
+The '''calcarine sulcus''' is a prominent anatomical feature of the [[medial surface of the brain]], located in the [[occipital lobe]]. It is a deep groove that plays a crucial role in the [[visual system]] of the human brain.
-== Anatomy ==
+==Anatomy==
+[[File:Calcarine_sulcus_medial.jpg|Medial view of the calcarine sulcus|thumb|left]]
+The calcarine sulcus begins near the [[occipital pole]] and extends forward to the [[parieto-occipital sulcus]]. It is situated on the medial aspect of the occipital lobe and is bordered by the [[cuneus]] above and the [[lingual gyrus]] below. The sulcus is approximately 5 cm in length and is one of the earliest sulci to develop in the human brain.
-The calcarine sulcus begins near the [[occipital pole]] of the brain and runs forward to the [[splenium]] of the [[corpus callosum]], a thick band of nerve fibers that connects the two hemispheres of the brain. It forms the upper boundary of the [[lingual gyrus]] and the lower boundary of the [[cuneus]], two structures involved in visual processing.
+==Function==
+The calcarine sulcus is significant because it contains the [[primary visual cortex]], also known as [[Brodmann area 17]]. This area is responsible for processing visual information received from the [[retina]] via the [[optic nerve]]. The primary visual cortex is essential for interpreting visual stimuli, such as light, color, and movement.
-== Function ==
+[[File:Brodmann_Cytoarchitectonics_17.png|Brodmann area 17, related to the calcarine sulcus|thumb|right]]
-The calcarine sulcus is the primary visual cortex, also known as [[Brodmann area 17]]. This area is the first to receive visual information relayed from the [[retina]] via the [[thalamus]]. The upper bank of the calcarine sulcus processes the lower half of the visual field, while the lower bank processes the upper half of the visual field.
+==Development==
+The calcarine sulcus is one of the first sulci to form during fetal development. It appears around the 20th week of gestation and continues to develop throughout the prenatal period. Its early formation is crucial for the proper development of the visual system.
-== Clinical significance ==
+==Clinical Significance==
+Damage to the calcarine sulcus or the surrounding primary visual cortex can result in [[visual field defects]], such as [[hemianopia]], where there is a loss of vision in half of the visual field. This can occur due to [[stroke]], [[trauma]], or [[tumors]] affecting the occipital lobe.
-Damage to the calcarine sulcus can result in [[visual field defects]], such as [[hemianopia]], a condition characterized by loss of vision in half of the visual field. It can also lead to [[cortical blindness]], a total loss of vision caused by damage to the visual cortex.
+==Related Structures==
+The calcarine sulcus is closely associated with several other structures in the occipital lobe, including:
+* The [[cuneus]], which lies superior to the sulcus.
+* The [[lingual gyrus]], which is located inferior to the sulcus.
+* The [[parieto-occipital sulcus]], which intersects with the calcarine sulcus.
-== See also ==
+==Images==
+[[File:Medial_surface_of_cerebral_cortex_-_gyri.png|Medial surface of cerebral cortex showing gyri|thumb|left]]
+[[File:Gray727_calcarine_sulcus.svg|Diagram of the calcarine sulcus|thumb|right]]
+[[File:Gray738.png|Anatomical illustration showing the calcarine sulcus|thumb|left]]
+==Related Pages==
 * [[Visual cortex]]
 * [[Occipital lobe]]
 * [[Brodmann area 17]]
+* [[Visual system]]
-== References ==
-{{reflist}}
 [[Category:Neuroanatomy]]
 [[Category:Visual system]]
-{{neuroscience-stub}}