Olfactory Sulcus

On the 5-7 serial coronal sections from crista galli of ethmoid bone to the optic chiasm, the cusp ellipse olfactory bulb and the triangular tract were situated in the shallow part of the olfactory sulcus. CONCLUSION: The olfactory bulb and olfactory tract lay tightly on the ethmoidal cribriform plate and jugum sphenoidale , in the olfactory cistern of the shallow part of the olfactory sulcus, the ethmoid sinus and sphenoid sinus inferiorly..  

Techniques for collecting quantitative data on olfactory bulb volume and on olfactory sulcus depth are described.  

Quantitative measurements of olfactory bulb volume and of olfactory sulcus depth, and the morphological depiction of structural abnormalities, make synergistic contributions to the accurate radiological diagnosis of smell dysfunction. In this paper, we provide an outline of how to measure olfactory bulb volume and olfactory sulcus depth, with numerous illustrative cases of patients with congenital anosmia, post-infectious or posttraumatic olfactory loss and sinonasal-related olfactory dysfunction..  

Abnormal forebrain development during this period is often characterized by a shallow olfactory sulcus.  

A hypoplastic olfactory sulcus was shown by MRI, but no olfactory bulb.  

The sulci measured were the olfactory sulcus (16 weeks), the parieto-occipital sulcus (22-23 weeks), the superior temporal sulcus (32 weeks) and the orbitofrontal sulcus (36-39 weeks).  

The olfactory bulb ends with the olfactory tract and is closely related to the olfactory sulcus of the frontal lobe. In this review, we will discuss the actual knowledge regarding olfactory bulb function, practical ways to measure olfactory bulb volume and olfactory sulcus depth, and report systematic observations regarding these measurements related to various causes of olfactory dysfunction, e.g.  

The orbital sulci were connected with olfactory sulcus in one right hemispheres, but not in the left.  

The results showed that the olfactory cistern was situated in the superficial part of the olfactory sulcus, which separated the gyrus retus from the orbital gyrus. There were two or three of arterial loops in each olfactory sulcus, from which long, fine olfactory arteries originated.  

In this paper, we propose the coronal section containing the anterior termination of the olfactory sulcus (ATOS) as an easy-to-identify landmark for FP parcellation that largely overlaps with the cytoarchitectonic distinction between BA 10 and the more posterior cytoarchitectonic subdivisions of the PFC.  

This study aimed to explore olfactory deficit in PD and to investigate its possible correlation with the disease severity or the depth of the olfactory sulcus. Among these subjects, the depth of the olfactory sulcus of 42 PD patients and 8 controls was measured in the plane of the posterior tangent through the eyeballs using the coronal view brain MRI. However, CC-SIT did not correlate with the disease duration, H-Y stage, score of UPDRS Part III, or the depth of either side of the olfactory sulcus (P>0.05). The absence of correlation of olfactory deficit with the disease severity or the depth of olfactory sulcus may suggest that olfactory loss precede the development of motor signs and not be a primary consequence of damage to the olfactory sulcus..  

METHODS: We evaluated the depth and volume of the primary olfactory sulcus (developed at 16 weeks' gestation) and the secondary orbital sulci (which start to develop at 28 weeks' gestation) in a sample of 22 adolescents with history of very-preterm birth (VPTB).  

In all three patients with a 'saccular type' AWAICA, accumulation of the subarachnoid clot in the olfactory sulcus was noted on CT scan. The accumulation of subarachnoid clot in the olfactory sulcus on CT scan may suggest a ruptured 'saccular type' AWAICA..  

Based on previous cytoarchitectonic studies, the coronal plane of the anterior termination of olfactory sulcus (ATOS) was used as a landmark for delimiting the boundary between the frontal pole (FP) and the frontal gyri.  

MATERIALS AND METHODS: Olfactory function was assessed with the "Sniffin' Sticks" test kit, and the magnetic resonance imaging study focused on OB volume and the olfactory sulcus.  

Seven of them, including two patients with Kallmann syndrome, exhibited abnormality of the olfactory bulb, olfactory tract, olfactory sulcus, or rectus gyrus, with some variation among patients in type and degree of abnormality.  

The medial and lateral subdivisions of OFC were also separately measured using the olfactory sulcus as the boundary to distinguish between them.  

The aim of this study was to identify whether the depth of the olfactory sulcus relates to olfactory function in healthy subjects. Magnetic resonance imaging of the olfactory sulcus was performed immediately following olfactometry. Based on previous investigations the depth of the olfactory sulcus was measured in the plane of the posterior tangent through the eyeballs. Olfactory function correlated significantly with left-sided depth of the olfactory sulcus (r(44)=0.33, P=0.03); no such correlation was seen for the right side. In addition, olfactory sulcus depth was found to be significantly deeper on the right compared to the left side (t=5.61, P<0.001). Further, lateralization of olfactory sulcus depth may correlate to functional lateralization in the olfactory system. Thus, it may be carefully speculated that sensory input in the olfactory system results in cortical growth in the area of the olfactory sulcus, at least at some developmental stage..  

PATIENTS AND METHODS: We present 25 patients who were operated on for meningiomas of the olfactory sulcus, orbit and sella and suprasella meningiomas, and the results obtained.  

We assessed the length and depth of the olfactory sulcus, olfactory bulb volume, and olfactory sulcus depth in the plane of the posterior tangent through the eyeballs (PPTE). The depth of the olfactory sulcus at the level of the PPTE was smaller in patients with IA than in control subjects. The depth of the olfactory sulcus was greater on the right than on the left, and there was no overlap. Among patients with IA, the depth of the olfactory sulcus differed significantly between those with and those without visible olfactory tracts. CONCLUSION: The depth of the olfactory sulcus at the level of the PPTE reflects the presence of olfactory tracts. The presence or absence of the olfactory tract may therefore have some association with cortical growth of the olfactory sulcus region. The olfactory sulcus is deeper on the right than on the left, particularly in patients with IA.  

The olfactory sulcus occupies the most medial position forming the lateral border of the gyrus rectus.  

Qualitative grading for olfactory bulb, olfactory tract, olfactory sulcus, subfrontal region, hippocampus, and temporal lobe damage also was performed.  

To explore the origin of olfactory sulcus polyp (OSP) and observe the recovery of olfaction after functional endoscopic sinus surgery, fifty-nine olfactory sulcus polyps in 31 patients were reviewed.  

The arachnoid separates from the pial membrane and forms a bridge with the ventral part of the olfactory bulb and tract, from the lateral edge of the olfactory sulcus to the medial edge of the gyrus rectus. The cistern is wide in its anterior portion, between the gyrus rectus and the olfactory bulb, and is reduced to a virtual slit in its posterior portion where the tract is lodged in the olfactory sulcus. (segment A2), or from the medial fronto-basal a., and consistently provides terminal branches in front of the olfactory trigone in the medial olfactory sulcus.  

Seventeen patients with KS demonstrated aplasia of an olfactory bulb; one olfactory sulcus was absent in six, rudimentary in four, and normal in eight.  

By contrast, in patients with isolated hypogonadotropic hypogonadism, hypothalamic pituitary anatomy is normal, although abnormalities of the olfactory sulcus are present in patients with anosmia and hypogonadotropism (Kallmann syndrome).  

The MRT criterion for the presence of Kallmann's syndrome appears to be an interruption or total absence of the olfactory sulcus..  

The first 5 mm of the distal anterior cerebral artery (A2) had perforating branches penetrating the brain at the gyrus rectus and olfactory sulcus.  

The aneurysm was located at the tip of an abnormal loop of the proximal anterior cerebral artery and was buried in the olfactory sulcus.  

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