What is the Parieto-occipital fissure?
What is the Parieto-occipital fissure?
The parieto-occipital fissure or sulcus, is an oblique sulcus which demarcates the occipital lobe from the parietal lobe on the medial surface of the cerebral hemisphere 1. The parieto-occipital sulcus joins the calcarine sulcus to form a pattern similar to the letter Y which has been placed sideways 2.
What does the Parieto-occipital fissure separate?
On the medial surface of the hemisected brain, the parieto-occipital sulcus separates the occipital lobe from the rest of the brain. The separation is a bit tricky on the lateral surface.
Where is the Parieto-occipital region?
The temporo-parieto-occipital (TPO) junction is located at the posterior end of the Sylvian fissure, where the temporal, parietal and occipital lobes meet. The TPO is a complex region of the brain through which various white matter (WM) fibres pass.
What does parietal fissure mean?
: a fissure near the posterior end of each cerebral hemisphere separating the parietal and occipital lobes.
What is the function of the parieto-occipital sulcus?
It forms a notch on the external surface of the brain that serves as a landmark to draw the line that arbitrarily limits the occipital and parietal lobes externally (Fig. 1b) and from there goes downward and anteriorly following a linear path. At its midpoint it merges with the terminus of the calcarine sulcus.
What is an occipital hematoma?
Occipital hematoma: A hematoma (collection of blood) in the occipital region (at the back of the head). An occipital hematoma may be either subdural or epidural. In an occipital epidural hematoma, the bleeding occurs between the skull and the dura (the brain cover).
What is the function of parieto-occipital sulcus?
The parieto-occipital sulcus (also called the parieto-occipital fissure) is a deep sulcus in the cerebral cortex that marks the boundary between the cuneus and precuneus, and also between the parietal and occipital lobes.
What happens when there is damage to the occipital lobe?
Injury to the occipital lobes may lead to vision impairments such as blindness or blind spots; visual distortions and visual inattention. The occipital lobes are also associated with various behaviors and functions that include: visual recognition; visual attention; and spatial analysis.
What other structures help the occipital lobe?
The visual cortex, called the associative area, constantly communicates with other brain structures, forming a complete image of the world. The occipital lobe has strong links with the limbic system (especially the hippocampus), the parietal, and temporal lobes.
Is there a MRI of the parietal lobe?
1, Angular gyrus. 2, Lateral ventricle 3, Genu, corpus callosum. MRI of the brain, T1-weighted coronal view. Level 2. Image 3. 1, Angular gyrus. 2, Cerebellum. MRI of the brain, T1-weighted sagittal view.
Is the parietal lobe part of the occipital lobe?
Parietooccipital sulcus separates partially the parietal lobe from occipital lobe in his medial part. Parietooccipital sulcus delimits the precuneus (parietal lobe) from the cuneus (occipital lobe).
When to use arthrography in conjunction with a MRI?
Arthrography in conjunction with MRI or CT is used most often to evaluate the intraarticular structures (e.g., glenoid labrum, synovial disorders) that are not as easily seen without intraarticular contrast.
Can a CT arthrogram be performed with claustrophobia?
Claustrophobia is also a relative contraindication for the performance of MR arthrography, and in these cases either a mild sedative can be administered to the patient or a CT arthrogram can be performed.